Vulnerability-Lookup

GHSA-48R8-X424-WVC7

Vulnerability from github – Published: 2026-07-25 12:31 – Updated: 2026-07-25 12:31

Details

In the Linux kernel, the following vulnerability has been resolved:

netfilter: ebtables: zero chainstack array

sashiko reports: looking at ebtables table translation, could a sparse cpu_possible_mask lead to an uninitialized pointer free?

If cpu_possible_mask is sparse (for example, CPU 0 and CPU 2 are possible, but CPU 1 is not), the allocation loop skips CPU 1. If vmalloc_node() fails at CPU 2, the cleanup loop will blindly decrement and call vfree() on newinfo->chainstack[1].

Not a real-world bug, such allocation isn't expected to fail in the first place.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-64413"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-25T10:17:25Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: ebtables: zero chainstack array\n\nsashiko reports:\n looking at ebtables table\n translation, could a sparse cpu_possible_mask lead to an uninitialized pointer\n free?\n\n If cpu_possible_mask is sparse (for example, CPU 0 and CPU 2 are possible,\n but CPU 1 is not), the allocation loop skips CPU 1. If vmalloc_node() fails at\n CPU 2, the cleanup loop will blindly decrement and call vfree() on\n newinfo-\u003echainstack[1].\n\nNot a real-world bug, such allocation isn\u0027t expected to fail\nin the first place.",
  "id": "GHSA-48r8-x424-wvc7",
  "modified": "2026-07-25T12:31:34Z",
  "published": "2026-07-25T12:31:34Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64413"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/29bf41a9b59aff9f6197df58641a00037d567ca8"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2ade612967e2cdfb9290ebcb773f302c82f311fa"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/42bef500d07b5769d916e9122a3e3fa3fd2245ef"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5ee856e4208acafaaaf7b84824d39b78c21345d6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9e6c5169db423e51dcc66a73fd15409c0d38e088"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9f74d28e903fa4fdf82f870d0aeadddc8196e41c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cbfe53599eebffd188938ab6774cc41794f6f9d5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fc7f105451044501a50cfd530cfa3b472c54acbc"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-64413 (GCVE-0-2026-64413)

Vulnerability from cvelistv5 – Published: 2026-07-25 08:50 – Updated: 2026-07-25 08:50

Title

netfilter: ebtables: zero chainstack array

Summary

In the Linux kernel, the following vulnerability has been resolved: netfilter: ebtables: zero chainstack array sashiko reports: looking at ebtables table translation, could a sparse cpu_possible_mask lead to an uninitialized pointer free? If cpu_possible_mask is sparse (for example, CPU 0 and CPU 2 are possible, but CPU 1 is not), the allocation loop skips CPU 1. If vmalloc_node() fails at CPU 2, the cleanup loop will blindly decrement and call vfree() on newinfo->chainstack[1]. Not a real-world bug, such allocation isn't expected to fail in the first place.

Severity

No CVSS data available.

Assigner

Linux

References

8 references

URL	Tags
https://git.kernel.org/stable/c/2ade612967e2cdfb9…
https://git.kernel.org/stable/c/42bef500d07b5769d…
https://git.kernel.org/stable/c/fc7f105451044501a…
https://git.kernel.org/stable/c/9e6c5169db423e51d…
https://git.kernel.org/stable/c/29bf41a9b59aff9f6…
https://git.kernel.org/stable/c/9f74d28e903fa4fdf…
https://git.kernel.org/stable/c/5ee856e4208acafaa…
https://git.kernel.org/stable/c/cbfe53599eebffd18…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 2ade612967e2cdfb9290ebcb773f302c82f311fa (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 42bef500d07b5769d916e9122a3e3fa3fd2245ef (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < fc7f105451044501a50cfd530cfa3b472c54acbc (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 9e6c5169db423e51dcc66a73fd15409c0d38e088 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 29bf41a9b59aff9f6197df58641a00037d567ca8 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 9f74d28e903fa4fdf82f870d0aeadddc8196e41c (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 5ee856e4208acafaaaf7b84824d39b78c21345d6 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < cbfe53599eebffd188938ab6774cc41794f6f9d5 (git)
Linux	Linux	Affected: 2.6.12 Unaffected: 0 , < 2.6.12 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.97 , ≤ 6.12.* (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2-rc3 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/bridge/netfilter/ebtables.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "2ade612967e2cdfb9290ebcb773f302c82f311fa",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "42bef500d07b5769d916e9122a3e3fa3fd2245ef",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "fc7f105451044501a50cfd530cfa3b472c54acbc",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "9e6c5169db423e51dcc66a73fd15409c0d38e088",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "29bf41a9b59aff9f6197df58641a00037d567ca8",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "9f74d28e903fa4fdf82f870d0aeadddc8196e41c",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "5ee856e4208acafaaaf7b84824d39b78c21345d6",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "cbfe53599eebffd188938ab6774cc41794f6f9d5",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/bridge/netfilter/ebtables.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.12"
            },
            {
              "lessThan": "2.6.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.261",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.212",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.97",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.39",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2-rc3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.261",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.212",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.178",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.145",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.97",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.39",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.4",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2-rc3",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: ebtables: zero chainstack array\n\nsashiko reports:\n looking at ebtables table\n translation, could a sparse cpu_possible_mask lead to an uninitialized pointer\n free?\n\n If cpu_possible_mask is sparse (for example, CPU 0 and CPU 2 are possible,\n but CPU 1 is not), the allocation loop skips CPU 1. If vmalloc_node() fails at\n CPU 2, the cleanup loop will blindly decrement and call vfree() on\n newinfo-\u003echainstack[1].\n\nNot a real-world bug, such allocation isn\u0027t expected to fail\nin the first place."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-25T08:50:53.759Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/2ade612967e2cdfb9290ebcb773f302c82f311fa"
        },
        {
          "url": "https://git.kernel.org/stable/c/42bef500d07b5769d916e9122a3e3fa3fd2245ef"
        },
        {
          "url": "https://git.kernel.org/stable/c/fc7f105451044501a50cfd530cfa3b472c54acbc"
        },
        {
          "url": "https://git.kernel.org/stable/c/9e6c5169db423e51dcc66a73fd15409c0d38e088"
        },
        {
          "url": "https://git.kernel.org/stable/c/29bf41a9b59aff9f6197df58641a00037d567ca8"
        },
        {
          "url": "https://git.kernel.org/stable/c/9f74d28e903fa4fdf82f870d0aeadddc8196e41c"
        },
        {
          "url": "https://git.kernel.org/stable/c/5ee856e4208acafaaaf7b84824d39b78c21345d6"
        },
        {
          "url": "https://git.kernel.org/stable/c/cbfe53599eebffd188938ab6774cc41794f6f9d5"
        }
      ],
      "title": "netfilter: ebtables: zero chainstack array",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64413",
    "datePublished": "2026-07-25T08:50:53.759Z",
    "dateReserved": "2026-07-19T15:36:31.786Z",
    "dateUpdated": "2026-07-25T08:50:53.759Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

GHSA-48R8-X424-WVC7

CVE-2026-64413 (GCVE-0-2026-64413)

Tags

Sightings

Nomenclature