CVE-2024-26851 (GCVE-0-2024-26851)

Vulnerability from cvelistv5 – Published: 2024-04-17 10:17 – Updated: 2026-08-05 11:27
VLAI
Title
netfilter: nf_conntrack_h323: Add protection for bmp length out of range
Summary
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conntrack_h323: Add protection for bmp length out of range UBSAN load reports an exception of BRK#5515 SHIFT_ISSUE:Bitwise shifts that are out of bounds for their data type. vmlinux get_bitmap(b=75) + 712 <net/netfilter/nf_conntrack_h323_asn1.c:0> vmlinux decode_seq(bs=0xFFFFFFD008037000, f=0xFFFFFFD008037018, level=134443100) + 1956 <net/netfilter/nf_conntrack_h323_asn1.c:592> vmlinux decode_choice(base=0xFFFFFFD0080370F0, level=23843636) + 1216 <net/netfilter/nf_conntrack_h323_asn1.c:814> vmlinux decode_seq(f=0xFFFFFFD0080371A8, level=134443500) + 812 <net/netfilter/nf_conntrack_h323_asn1.c:576> vmlinux decode_choice(base=0xFFFFFFD008037280, level=0) + 1216 <net/netfilter/nf_conntrack_h323_asn1.c:814> vmlinux DecodeRasMessage() + 304 <net/netfilter/nf_conntrack_h323_asn1.c:833> vmlinux ras_help() + 684 <net/netfilter/nf_conntrack_h323_main.c:1728> vmlinux nf_confirm() + 188 <net/netfilter/nf_conntrack_proto.c:137> Due to abnormal data in skb->data, the extension bitmap length exceeds 32 when decoding ras message then uses the length to make a shift operation. It will change into negative after several loop. UBSAN load could detect a negative shift as an undefined behaviour and reports exception. So we add the protection to avoid the length exceeding 32. Or else it will return out of range error and stop decoding.
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 5e35941d990123f155b02d5663e51a24f816b6f3 , < 98db42191329c679f4ca52bec0b319689e1ad8cb (git)
Affected: 5e35941d990123f155b02d5663e51a24f816b6f3 , < 4bafcc43baf7bcf93566394dbd15726b5b456b7a (git)
Affected: 5e35941d990123f155b02d5663e51a24f816b6f3 , < ccd1108b16ab572d9bf635586b0925635dbd6bbc (git)
Affected: 5e35941d990123f155b02d5663e51a24f816b6f3 , < b3c0f553820516ad4b62a9390ecd28d6f73a7b13 (git)
Affected: 5e35941d990123f155b02d5663e51a24f816b6f3 , < 39001e3c42000e7c2038717af0d33c32319ad591 (git)
Affected: 5e35941d990123f155b02d5663e51a24f816b6f3 , < 014a807f1cc9c9d5173c1cd935835553b00d211c (git)
Affected: 5e35941d990123f155b02d5663e51a24f816b6f3 , < 80ee5054435a11c87c9a4f30f1ff750080c96416 (git)
Affected: 5e35941d990123f155b02d5663e51a24f816b6f3 , < 767146637efc528b5e3d31297df115e85a2fd362 (git)
Create a notification for this product.
Linux Linux Affected: 2.6.17
Unaffected: 0 , < 2.6.17 (semver)
Unaffected: 4.19.310 , ≤ 4.19.* (semver)
Unaffected: 5.4.272 , ≤ 5.4.* (semver)
Unaffected: 5.10.213 , ≤ 5.10.* (semver)
Unaffected: 5.15.152 , ≤ 5.15.* (semver)
Unaffected: 6.1.82 , ≤ 6.1.* (semver)
Unaffected: 6.6.22 , ≤ 6.6.* (semver)
Unaffected: 6.7.10 , ≤ 6.7.* (semver)
Unaffected: 6.8 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem Affected: 0 , < * (custom)
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-26851",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-06-12T17:33:25.792652Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-06-12T17:33:34.212Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-02T00:14:13.704Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/98db42191329c679f4ca52bec0b319689e1ad8cb"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/4bafcc43baf7bcf93566394dbd15726b5b456b7a"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/ccd1108b16ab572d9bf635586b0925635dbd6bbc"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/b3c0f553820516ad4b62a9390ecd28d6f73a7b13"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/39001e3c42000e7c2038717af0d33c32319ad591"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/014a807f1cc9c9d5173c1cd935835553b00d211c"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/80ee5054435a11c87c9a4f30f1ff750080c96416"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/767146637efc528b5e3d31297df115e85a2fd362"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "affected": [
          {
            "defaultStatus": "unknown",
            "product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem",
            "vendor": "Siemens",
            "versions": [
              {
                "lessThan": "*",
                "status": "affected",
                "version": "0",
                "versionType": "custom"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-12T11:49:32.649Z",
          "orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e",
          "shortName": "siemens-SADP"
        },
        "references": [
          {
            "url": "https://cert-portal.siemens.com/productcert/html/ssa-265688.html"
          }
        ],
        "x_adpType": "supplier"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/netfilter/nf_conntrack_h323_asn1.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "98db42191329c679f4ca52bec0b319689e1ad8cb",
              "status": "affected",
              "version": "5e35941d990123f155b02d5663e51a24f816b6f3",
              "versionType": "git"
            },
            {
              "lessThan": "4bafcc43baf7bcf93566394dbd15726b5b456b7a",
              "status": "affected",
              "version": "5e35941d990123f155b02d5663e51a24f816b6f3",
              "versionType": "git"
            },
            {
              "lessThan": "ccd1108b16ab572d9bf635586b0925635dbd6bbc",
              "status": "affected",
              "version": "5e35941d990123f155b02d5663e51a24f816b6f3",
              "versionType": "git"
            },
            {
              "lessThan": "b3c0f553820516ad4b62a9390ecd28d6f73a7b13",
              "status": "affected",
              "version": "5e35941d990123f155b02d5663e51a24f816b6f3",
              "versionType": "git"
            },
            {
              "lessThan": "39001e3c42000e7c2038717af0d33c32319ad591",
              "status": "affected",
              "version": "5e35941d990123f155b02d5663e51a24f816b6f3",
              "versionType": "git"
            },
            {
              "lessThan": "014a807f1cc9c9d5173c1cd935835553b00d211c",
              "status": "affected",
              "version": "5e35941d990123f155b02d5663e51a24f816b6f3",
              "versionType": "git"
            },
            {
              "lessThan": "80ee5054435a11c87c9a4f30f1ff750080c96416",
              "status": "affected",
              "version": "5e35941d990123f155b02d5663e51a24f816b6f3",
              "versionType": "git"
            },
            {
              "lessThan": "767146637efc528b5e3d31297df115e85a2fd362",
              "status": "affected",
              "version": "5e35941d990123f155b02d5663e51a24f816b6f3",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/netfilter/nf_conntrack_h323_asn1.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.17"
            },
            {
              "lessThan": "2.6.17",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.310",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.272",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.213",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.152",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.82",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.22",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.7.*",
              "status": "unaffected",
              "version": "6.7.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.8",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.19.310",
                  "versionStartIncluding": "2.6.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.272",
                  "versionStartIncluding": "2.6.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.213",
                  "versionStartIncluding": "2.6.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.152",
                  "versionStartIncluding": "2.6.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.82",
                  "versionStartIncluding": "2.6.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.22",
                  "versionStartIncluding": "2.6.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.7.10",
                  "versionStartIncluding": "2.6.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.8",
                  "versionStartIncluding": "2.6.17",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_conntrack_h323: Add protection for bmp length out of range\n\nUBSAN load reports an exception of BRK#5515 SHIFT_ISSUE:Bitwise shifts\nthat are out of bounds for their data type.\n\nvmlinux   get_bitmap(b=75) + 712\n\u003cnet/netfilter/nf_conntrack_h323_asn1.c:0\u003e\nvmlinux   decode_seq(bs=0xFFFFFFD008037000, f=0xFFFFFFD008037018, level=134443100) + 1956\n\u003cnet/netfilter/nf_conntrack_h323_asn1.c:592\u003e\nvmlinux   decode_choice(base=0xFFFFFFD0080370F0, level=23843636) + 1216\n\u003cnet/netfilter/nf_conntrack_h323_asn1.c:814\u003e\nvmlinux   decode_seq(f=0xFFFFFFD0080371A8, level=134443500) + 812\n\u003cnet/netfilter/nf_conntrack_h323_asn1.c:576\u003e\nvmlinux   decode_choice(base=0xFFFFFFD008037280, level=0) + 1216\n\u003cnet/netfilter/nf_conntrack_h323_asn1.c:814\u003e\nvmlinux   DecodeRasMessage() + 304\n\u003cnet/netfilter/nf_conntrack_h323_asn1.c:833\u003e\nvmlinux   ras_help() + 684\n\u003cnet/netfilter/nf_conntrack_h323_main.c:1728\u003e\nvmlinux   nf_confirm() + 188\n\u003cnet/netfilter/nf_conntrack_proto.c:137\u003e\n\nDue to abnormal data in skb-\u003edata, the extension bitmap length\nexceeds 32 when decoding ras message then uses the length to make\na shift operation. It will change into negative after several loop.\nUBSAN load could detect a negative shift as an undefined behaviour\nand reports exception.\nSo we add the protection to avoid the length exceeding 32. Or else\nit will return out of range error and stop decoding."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - The vulnerable decoder is driven entirely by attacker-supplied packet payload \u2014 a UDP datagram to port 1719 (RAS) or TCP 1720 (Q.931) processed by the in-kernel H.323 conntrack helper on any Linux router, firewall, or CPE with the ALG active. The attacker can be anywhere on the internet.\nAC:L - The 7-bit extension-bitmap length field is read verbatim from the packet, so the attacker simply sets it above 32 to force the out-of-range shift \u2014 deterministic, single packet, no timing or memory-layout dependency.\nPR:N - The helper runs on the very first packet of the flow (the trace shows it invoked from nf_confirm()), before any application-level state, credentials, or connection setup exist. A completely unauthenticated remote host triggers it.\nUI:N - Packet processing happens in softirq context on the conntrack hook with no involvement from any local user or administrator.\nS:U - The undefined behavior and its consequences are confined to the kernel of the host running the conntrack helper; no VM, IOMMU, or sandbox boundary is crossed.\nC:N - The out-of-range shift produces a garbage value in a local bitmap variable; the byte reads are still covered by nf_h323_error_boundary() and nothing is returned to the attacker, so there is no read primitive or information disclosure.\nI:N - There is no out-of-bounds write and no corruption of adjacent state \u2014 the extension loop remains bounded by f-\u003eub, so the effect is a misparse of the attacker\u0027s own message rather than modification of kernel data.\nA:H - On kernels built with the UBSAN shift sanitizer in trap mode (widely deployed on Android/vendor kernels, and the exact configuration in the bug report) the out-of-range shift raises a BRK exception and panics the kernel, so one unauthenticated remote packet takes the box down."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T11:27:47.072Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/98db42191329c679f4ca52bec0b319689e1ad8cb"
        },
        {
          "url": "https://git.kernel.org/stable/c/4bafcc43baf7bcf93566394dbd15726b5b456b7a"
        },
        {
          "url": "https://git.kernel.org/stable/c/ccd1108b16ab572d9bf635586b0925635dbd6bbc"
        },
        {
          "url": "https://git.kernel.org/stable/c/b3c0f553820516ad4b62a9390ecd28d6f73a7b13"
        },
        {
          "url": "https://git.kernel.org/stable/c/39001e3c42000e7c2038717af0d33c32319ad591"
        },
        {
          "url": "https://git.kernel.org/stable/c/014a807f1cc9c9d5173c1cd935835553b00d211c"
        },
        {
          "url": "https://git.kernel.org/stable/c/80ee5054435a11c87c9a4f30f1ff750080c96416"
        },
        {
          "url": "https://git.kernel.org/stable/c/767146637efc528b5e3d31297df115e85a2fd362"
        }
      ],
      "title": "netfilter: nf_conntrack_h323: Add protection for bmp length out of range",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-26851",
    "datePublished": "2024-04-17T10:17:15.298Z",
    "dateReserved": "2024-02-19T14:20:24.183Z",
    "dateUpdated": "2026-08-05T11:27:47.072Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2024-26851",
      "date": "2026-08-10",
      "epss": "0.00735",
      "percentile": "0.51031"
    },
    "fkie_nvd": {
      "descriptions": "[{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnetfilter: nf_conntrack_h323: Add protection for bmp length out of range\\n\\nUBSAN load reports an exception of BRK#5515 SHIFT_ISSUE:Bitwise shifts\\nthat are out of bounds for their data type.\\n\\nvmlinux   get_bitmap(b=75) + 712\\n\u003cnet/netfilter/nf_conntrack_h323_asn1.c:0\u003e\\nvmlinux   decode_seq(bs=0xFFFFFFD008037000, f=0xFFFFFFD008037018, level=134443100) + 1956\\n\u003cnet/netfilter/nf_conntrack_h323_asn1.c:592\u003e\\nvmlinux   decode_choice(base=0xFFFFFFD0080370F0, level=23843636) + 1216\\n\u003cnet/netfilter/nf_conntrack_h323_asn1.c:814\u003e\\nvmlinux   decode_seq(f=0xFFFFFFD0080371A8, level=134443500) + 812\\n\u003cnet/netfilter/nf_conntrack_h323_asn1.c:576\u003e\\nvmlinux   decode_choice(base=0xFFFFFFD008037280, level=0) + 1216\\n\u003cnet/netfilter/nf_conntrack_h323_asn1.c:814\u003e\\nvmlinux   DecodeRasMessage() + 304\\n\u003cnet/netfilter/nf_conntrack_h323_asn1.c:833\u003e\\nvmlinux   ras_help() + 684\\n\u003cnet/netfilter/nf_conntrack_h323_main.c:1728\u003e\\nvmlinux   nf_confirm() + 188\\n\u003cnet/netfilter/nf_conntrack_proto.c:137\u003e\\n\\nDue to abnormal data in skb-\u003edata, the extension bitmap length\\nexceeds 32 when decoding ras message then uses the length to make\\na shift operation. It will change into negative after several loop.\\nUBSAN load could detect a negative shift as an undefined behaviour\\nand reports exception.\\nSo we add the protection to avoid the length exceeding 32. Or else\\nit will return out of range error and stop decoding.\"}, {\"lang\": \"es\", \"value\": \"En el kernel de Linux, se resolvi\\u00f3 la siguiente vulnerabilidad: netfilter: nf_conntrack_h323: Agregar protecci\\u00f3n para longitud de bmp fuera de rango La carga de UBSAN informa una excepci\\u00f3n de BRK#5515 SHIFT_ISSUE: desplazamientos bit a bit que est\\u00e1n fuera de los l\\u00edmites para su tipo de datos. vmlinux get_bitmap(b=75) + 712  vmlinux decode_seq(bs=0xFFFFFFD008037000, f=0xFFFFFFD008037018, nivel=134443100) + 1956  vmlinux decode_choice (base=0xFFFFFFD0080370F0, nivel=23843636) + 1216  vmlinux decode_seq(f=0xFFFFFFD0080371A8, nivel=134443500) + 812  vmlinux decode_choice(base =0xFFFFFFD008037280, nivel=0) + 1216  vmlinux DecodeRasMessage() + 304  vmlinux ras_help() + 684  vmlinux nf_confirm() + 188  Debido a datos anormales en skb-\u0026gt;data, la longitud del mapa de bits de la extensi\\u00f3n excede 32 cuando se decodifica el mensaje ras y luego usa la longitud para realizar una operaci\\u00f3n de cambio . Cambiar\\u00e1 a negativo despu\\u00e9s de varios bucles. La carga de UBSAN podr\\u00eda detectar un cambio negativo como un comportamiento indefinido e informar una excepci\\u00f3n. Por lo tanto, agregamos la protecci\\u00f3n para evitar que la longitud exceda 32. De lo contrario, devolver\\u00e1 un error fuera de rango y dejar\\u00e1 de decodificar.\"}]",
      "id": "CVE-2024-26851",
      "lastModified": "2024-11-21T09:03:12.700",
      "published": "2024-04-17T11:15:08.473",
      "references": "[{\"url\": \"https://git.kernel.org/stable/c/014a807f1cc9c9d5173c1cd935835553b00d211c\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/39001e3c42000e7c2038717af0d33c32319ad591\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/4bafcc43baf7bcf93566394dbd15726b5b456b7a\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/767146637efc528b5e3d31297df115e85a2fd362\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/80ee5054435a11c87c9a4f30f1ff750080c96416\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/98db42191329c679f4ca52bec0b319689e1ad8cb\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/b3c0f553820516ad4b62a9390ecd28d6f73a7b13\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/ccd1108b16ab572d9bf635586b0925635dbd6bbc\", \"source\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}, {\"url\": \"https://git.kernel.org/stable/c/014a807f1cc9c9d5173c1cd935835553b00d211c\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/39001e3c42000e7c2038717af0d33c32319ad591\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/4bafcc43baf7bcf93566394dbd15726b5b456b7a\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/767146637efc528b5e3d31297df115e85a2fd362\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/80ee5054435a11c87c9a4f30f1ff750080c96416\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/98db42191329c679f4ca52bec0b319689e1ad8cb\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/b3c0f553820516ad4b62a9390ecd28d6f73a7b13\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://git.kernel.org/stable/c/ccd1108b16ab572d9bf635586b0925635dbd6bbc\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html\", \"source\": \"af854a3a-2127-422b-91ae-364da2661108\"}]",
      "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "vulnStatus": "Awaiting Analysis"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-26851\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-04-17T11:15:08.473\",\"lastModified\":\"2026-08-04T11:17:12.943\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnetfilter: nf_conntrack_h323: Add protection for bmp length out of range\\n\\nUBSAN load reports an exception of BRK#5515 SHIFT_ISSUE:Bitwise shifts\\nthat are out of bounds for their data type.\\n\\nvmlinux   get_bitmap(b=75) + 712\\n\u003cnet/netfilter/nf_conntrack_h323_asn1.c:0\u003e\\nvmlinux   decode_seq(bs=0xFFFFFFD008037000, f=0xFFFFFFD008037018, level=134443100) + 1956\\n\u003cnet/netfilter/nf_conntrack_h323_asn1.c:592\u003e\\nvmlinux   decode_choice(base=0xFFFFFFD0080370F0, level=23843636) + 1216\\n\u003cnet/netfilter/nf_conntrack_h323_asn1.c:814\u003e\\nvmlinux   decode_seq(f=0xFFFFFFD0080371A8, level=134443500) + 812\\n\u003cnet/netfilter/nf_conntrack_h323_asn1.c:576\u003e\\nvmlinux   decode_choice(base=0xFFFFFFD008037280, level=0) + 1216\\n\u003cnet/netfilter/nf_conntrack_h323_asn1.c:814\u003e\\nvmlinux   DecodeRasMessage() + 304\\n\u003cnet/netfilter/nf_conntrack_h323_asn1.c:833\u003e\\nvmlinux   ras_help() + 684\\n\u003cnet/netfilter/nf_conntrack_h323_main.c:1728\u003e\\nvmlinux   nf_confirm() + 188\\n\u003cnet/netfilter/nf_conntrack_proto.c:137\u003e\\n\\nDue to abnormal data in skb-\u003edata, the extension bitmap length\\nexceeds 32 when decoding ras message then uses the length to make\\na shift operation. It will change into negative after several loop.\\nUBSAN load could detect a negative shift as an undefined behaviour\\nand reports exception.\\nSo we add the protection to avoid the length exceeding 32. Or else\\nit will return out of range error and stop decoding.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: netfilter: nf_conntrack_h323: Agregar protecci\u00f3n para longitud de bmp fuera de rango La carga de UBSAN informa una excepci\u00f3n de BRK#5515 SHIFT_ISSUE: desplazamientos bit a bit que est\u00e1n fuera de los l\u00edmites para su tipo de datos. vmlinux get_bitmap(b=75) + 712  vmlinux decode_seq(bs=0xFFFFFFD008037000, f=0xFFFFFFD008037018, nivel=134443100) + 1956  vmlinux decode_choice (base=0xFFFFFFD0080370F0, nivel=23843636) + 1216  vmlinux decode_seq(f=0xFFFFFFD0080371A8, nivel=134443500) + 812  vmlinux decode_choice(base =0xFFFFFFD008037280, nivel=0) + 1216  vmlinux DecodeRasMessage() + 304  vmlinux ras_help() + 684  vmlinux nf_confirm() + 188  Debido a datos anormales en skb-\u0026gt;data, la longitud del mapa de bits de la extensi\u00f3n excede 32 cuando se decodifica el mensaje ras y luego usa la longitud para realizar una operaci\u00f3n de cambio . Cambiar\u00e1 a negativo despu\u00e9s de varios bucles. La carga de UBSAN podr\u00eda detectar un cambio negativo como un comportamiento indefinido e informar una excepci\u00f3n. Por lo tanto, agregamos la protecci\u00f3n para evitar que la longitud exceda 32. De lo contrario, devolver\u00e1 un error fuera de rango y dejar\u00e1 de decodificar.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/netfilter/nf_conntrack_h323_asn1.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5e35941d990123f155b02d5663e51a24f816b6f3\",\"lessThan\":\"98db42191329c679f4ca52bec0b319689e1ad8cb\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5e35941d990123f155b02d5663e51a24f816b6f3\",\"lessThan\":\"4bafcc43baf7bcf93566394dbd15726b5b456b7a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5e35941d990123f155b02d5663e51a24f816b6f3\",\"lessThan\":\"ccd1108b16ab572d9bf635586b0925635dbd6bbc\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5e35941d990123f155b02d5663e51a24f816b6f3\",\"lessThan\":\"b3c0f553820516ad4b62a9390ecd28d6f73a7b13\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5e35941d990123f155b02d5663e51a24f816b6f3\",\"lessThan\":\"39001e3c42000e7c2038717af0d33c32319ad591\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5e35941d990123f155b02d5663e51a24f816b6f3\",\"lessThan\":\"014a807f1cc9c9d5173c1cd935835553b00d211c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5e35941d990123f155b02d5663e51a24f816b6f3\",\"lessThan\":\"80ee5054435a11c87c9a4f30f1ff750080c96416\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5e35941d990123f155b02d5663e51a24f816b6f3\",\"lessThan\":\"767146637efc528b5e3d31297df115e85a2fd362\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/netfilter/nf_conntrack_h323_asn1.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2.6.17\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"2.6.17\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"4.19.310\",\"lessThanOrEqual\":\"4.19.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.4.272\",\"lessThanOrEqual\":\"5.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.213\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.152\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.82\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.22\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.7.10\",\"lessThanOrEqual\":\"6.7.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.8\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]},{\"source\":\"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\",\"affectedData\":[{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 TM MFP - GNU/Linux subsystem\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"0\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":7.5,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":3.6},{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2024-06-12T17:33:25.792652Z\",\"id\":\"CVE-2024-26851\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"total\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-787\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"2.6.17\",\"versionEndExcluding\":\"4.19.310\",\"matchCriteriaId\":\"2376FDE6-6EC1-445C-9CBA-98C1D1D59B0A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.20\",\"versionEndExcluding\":\"5.4.272\",\"matchCriteriaId\":\"06199E67-91F5-4EC0-828B-22825E4DBAD1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.213\",\"matchCriteriaId\":\"CE7B425A-A38B-494A-AA47-EC2251748164\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.152\",\"matchCriteriaId\":\"DBBE9241-559E-479A-895A-02186BA03EBF\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.82\",\"matchCriteriaId\":\"933AC628-7DAD-4B2D-82E3-3B7B331B1C09\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.22\",\"matchCriteriaId\":\"AC6FD6F8-5B16-4F53-8116-D42F4BF4FBAC\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.7.10\",\"matchCriteriaId\":\"FB4549F9-0160-455F-8CDC-98D38AEF6D66\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.8:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"B9F4EA73-0894-400F-A490-3A397AB7A517\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.8:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"056BD938-0A27-4569-B391-30578B309EE3\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.8:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"F02056A5-B362-4370-9FF8-6F0BD384D520\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.8:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"62075ACE-B2A0-4B16-829D-B3DA5AE5CC41\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.8:rc5:*:*:*:*:*:*\",\"matchCriteriaId\":\"A780F817-2A77-4130-A9B7-5C25606314E3\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.8:rc6:*:*:*:*:*:*\",\"matchCriteriaId\":\"AEB9199B-AB8F-4877-8964-E2BA95B5F15C\"}]}]},{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*\",\"matchCriteriaId\":\"07B237A9-69A3-4A9C-9DA0-4E06BD37AE73\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/014a807f1cc9c9d5173c1cd935835553b00d211c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/39001e3c42000e7c2038717af0d33c32319ad591\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/4bafcc43baf7bcf93566394dbd15726b5b456b7a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/767146637efc528b5e3d31297df115e85a2fd362\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/80ee5054435a11c87c9a4f30f1ff750080c96416\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/98db42191329c679f4ca52bec0b319689e1ad8cb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/b3c0f553820516ad4b62a9390ecd28d6f73a7b13\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ccd1108b16ab572d9bf635586b0925635dbd6bbc\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/014a807f1cc9c9d5173c1cd935835553b00d211c\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/39001e3c42000e7c2038717af0d33c32319ad591\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/4bafcc43baf7bcf93566394dbd15726b5b456b7a\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/767146637efc528b5e3d31297df115e85a2fd362\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/80ee5054435a11c87c9a4f30f1ff750080c96416\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/98db42191329c679f4ca52bec0b319689e1ad8cb\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/b3c0f553820516ad4b62a9390ecd28d6f73a7b13\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ccd1108b16ab572d9bf635586b0925635dbd6bbc\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Mailing List\"]},{\"url\":\"https://cert-portal.siemens.com/productcert/html/ssa-265688.html\",\"source\":\"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-04T19:10:54+00:00",
      "cve": "CVE-2024-26851",
      "id": "CVE-2024-26851",
      "initial_release_date": "2024-04-17T00:00:00+00:00",
      "product_status:fixed": "549",
      "product_status:known_affected": "108",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: netfilter: nf_conntrack_h323: Add protection for bmp length out of range",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-26851.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-07-23T02:09:00Z",
      "cve": "CVE-2024-26851",
      "id": "CVE-2024-26851",
      "initial_release_date": "2024-04-19T02:18:39Z",
      "product_status:known_affected": "562",
      "product_status:known_not_affected": "12",
      "product_status:recommended": "752",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2024-26851",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2024-26851.json",
      "version": "93"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/98db42191329c679f4ca52bec0b319689e1ad8cb\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/4bafcc43baf7bcf93566394dbd15726b5b456b7a\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/ccd1108b16ab572d9bf635586b0925635dbd6bbc\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/b3c0f553820516ad4b62a9390ecd28d6f73a7b13\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/39001e3c42000e7c2038717af0d33c32319ad591\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/014a807f1cc9c9d5173c1cd935835553b00d211c\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/80ee5054435a11c87c9a4f30f1ff750080c96416\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/767146637efc528b5e3d31297df115e85a2fd362\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-02T00:14:13.704Z\"}}, {\"affected\": [{\"vendor\": \"Siemens\", \"product\": \"SIMATIC S7-1500 TM MFP - GNU/Linux subsystem\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"*\", \"versionType\": \"custom\"}], \"defaultStatus\": \"unknown\"}], \"x_adpType\": \"supplier\", \"references\": [{\"url\": \"https://cert-portal.siemens.com/productcert/html/ssa-265688.html\"}], \"providerMetadata\": {\"orgId\": \"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\", \"shortName\": \"siemens-SADP\", \"dateUpdated\": \"2026-05-12T11:49:32.649Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-26851\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-06-12T17:33:25.792652Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-06-12T17:33:31.483Z\"}}], \"cna\": {\"title\": \"netfilter: nf_conntrack_h323: Add protection for bmp length out of range\", \"metrics\": [{\"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 7.5, \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"AV:N - The vulnerable decoder is driven entirely by attacker-supplied packet payload \\u2014 a UDP datagram to port 1719 (RAS) or TCP 1720 (Q.931) processed by the in-kernel H.323 conntrack helper on any Linux router, firewall, or CPE with the ALG active. The attacker can be anywhere on the internet.\\nAC:L - The 7-bit extension-bitmap length field is read verbatim from the packet, so the attacker simply sets it above 32 to force the out-of-range shift \\u2014 deterministic, single packet, no timing or memory-layout dependency.\\nPR:N - The helper runs on the very first packet of the flow (the trace shows it invoked from nf_confirm()), before any application-level state, credentials, or connection setup exist. A completely unauthenticated remote host triggers it.\\nUI:N - Packet processing happens in softirq context on the conntrack hook with no involvement from any local user or administrator.\\nS:U - The undefined behavior and its consequences are confined to the kernel of the host running the conntrack helper; no VM, IOMMU, or sandbox boundary is crossed.\\nC:N - The out-of-range shift produces a garbage value in a local bitmap variable; the byte reads are still covered by nf_h323_error_boundary() and nothing is returned to the attacker, so there is no read primitive or information disclosure.\\nI:N - There is no out-of-bounds write and no corruption of adjacent state \\u2014 the extension loop remains bounded by f-\u003eub, so the effect is a misparse of the attacker\u0027s own message rather than modification of kernel data.\\nA:H - On kernels built with the UBSAN shift sanitizer in trap mode (widely deployed on Android/vendor kernels, and the exact configuration in the bug report) the out-of-range shift raises a BRK exception and panics the kernel, so one unauthenticated remote packet takes the box down.\"}]}], \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5e35941d990123f155b02d5663e51a24f816b6f3\", \"lessThan\": \"98db42191329c679f4ca52bec0b319689e1ad8cb\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"5e35941d990123f155b02d5663e51a24f816b6f3\", \"lessThan\": \"4bafcc43baf7bcf93566394dbd15726b5b456b7a\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"5e35941d990123f155b02d5663e51a24f816b6f3\", \"lessThan\": \"ccd1108b16ab572d9bf635586b0925635dbd6bbc\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"5e35941d990123f155b02d5663e51a24f816b6f3\", \"lessThan\": \"b3c0f553820516ad4b62a9390ecd28d6f73a7b13\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"5e35941d990123f155b02d5663e51a24f816b6f3\", \"lessThan\": \"39001e3c42000e7c2038717af0d33c32319ad591\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"5e35941d990123f155b02d5663e51a24f816b6f3\", \"lessThan\": \"014a807f1cc9c9d5173c1cd935835553b00d211c\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"5e35941d990123f155b02d5663e51a24f816b6f3\", \"lessThan\": \"80ee5054435a11c87c9a4f30f1ff750080c96416\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"5e35941d990123f155b02d5663e51a24f816b6f3\", \"lessThan\": \"767146637efc528b5e3d31297df115e85a2fd362\", \"versionType\": \"git\"}], \"programFiles\": [\"net/netfilter/nf_conntrack_h323_asn1.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"2.6.17\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"2.6.17\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"4.19.310\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"5.4.272\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.213\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.152\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.82\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.22\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.7.10\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.7.*\"}, {\"status\": \"unaffected\", \"version\": \"6.8\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/netfilter/nf_conntrack_h323_asn1.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/98db42191329c679f4ca52bec0b319689e1ad8cb\"}, {\"url\": \"https://git.kernel.org/stable/c/4bafcc43baf7bcf93566394dbd15726b5b456b7a\"}, {\"url\": \"https://git.kernel.org/stable/c/ccd1108b16ab572d9bf635586b0925635dbd6bbc\"}, {\"url\": \"https://git.kernel.org/stable/c/b3c0f553820516ad4b62a9390ecd28d6f73a7b13\"}, {\"url\": \"https://git.kernel.org/stable/c/39001e3c42000e7c2038717af0d33c32319ad591\"}, {\"url\": \"https://git.kernel.org/stable/c/014a807f1cc9c9d5173c1cd935835553b00d211c\"}, {\"url\": \"https://git.kernel.org/stable/c/80ee5054435a11c87c9a4f30f1ff750080c96416\"}, {\"url\": \"https://git.kernel.org/stable/c/767146637efc528b5e3d31297df115e85a2fd362\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnetfilter: nf_conntrack_h323: Add protection for bmp length out of range\\n\\nUBSAN load reports an exception of BRK#5515 SHIFT_ISSUE:Bitwise shifts\\nthat are out of bounds for their data type.\\n\\nvmlinux   get_bitmap(b=75) + 712\\n\u003cnet/netfilter/nf_conntrack_h323_asn1.c:0\u003e\\nvmlinux   decode_seq(bs=0xFFFFFFD008037000, f=0xFFFFFFD008037018, level=134443100) + 1956\\n\u003cnet/netfilter/nf_conntrack_h323_asn1.c:592\u003e\\nvmlinux   decode_choice(base=0xFFFFFFD0080370F0, level=23843636) + 1216\\n\u003cnet/netfilter/nf_conntrack_h323_asn1.c:814\u003e\\nvmlinux   decode_seq(f=0xFFFFFFD0080371A8, level=134443500) + 812\\n\u003cnet/netfilter/nf_conntrack_h323_asn1.c:576\u003e\\nvmlinux   decode_choice(base=0xFFFFFFD008037280, level=0) + 1216\\n\u003cnet/netfilter/nf_conntrack_h323_asn1.c:814\u003e\\nvmlinux   DecodeRasMessage() + 304\\n\u003cnet/netfilter/nf_conntrack_h323_asn1.c:833\u003e\\nvmlinux   ras_help() + 684\\n\u003cnet/netfilter/nf_conntrack_h323_main.c:1728\u003e\\nvmlinux   nf_confirm() + 188\\n\u003cnet/netfilter/nf_conntrack_proto.c:137\u003e\\n\\nDue to abnormal data in skb-\u003edata, the extension bitmap length\\nexceeds 32 when decoding ras message then uses the length to make\\na shift operation. It will change into negative after several loop.\\nUBSAN load could detect a negative shift as an undefined behaviour\\nand reports exception.\\nSo we add the protection to avoid the length exceeding 32. Or else\\nit will return out of range error and stop decoding.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.310\", \"versionStartIncluding\": \"2.6.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.272\", \"versionStartIncluding\": \"2.6.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.213\", \"versionStartIncluding\": \"2.6.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.152\", \"versionStartIncluding\": \"2.6.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.82\", \"versionStartIncluding\": \"2.6.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.22\", \"versionStartIncluding\": \"2.6.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.7.10\", \"versionStartIncluding\": \"2.6.17\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.8\", \"versionStartIncluding\": \"2.6.17\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T11:27:47.072Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-26851\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-05T11:27:47.072Z\", \"dateReserved\": \"2024-02-19T14:20:24.183Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-04-17T10:17:15.298Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.