cve-2024-47702
Vulnerability from cvelistv5
Published
2024-10-21 11:53
Modified
2024-12-19 09:26
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf: Fail verification for sign-extension of packet data/data_end/data_meta syzbot reported a kernel crash due to commit 1f1e864b6555 ("bpf: Handle sign-extenstin ctx member accesses"). The reason is due to sign-extension of 32-bit load for packet data/data_end/data_meta uapi field. The original code looks like: r2 = *(s32 *)(r1 + 76) /* load __sk_buff->data */ r3 = *(u32 *)(r1 + 80) /* load __sk_buff->data_end */ r0 = r2 r0 += 8 if r3 > r0 goto +1 ... Note that __sk_buff->data load has 32-bit sign extension. After verification and convert_ctx_accesses(), the final asm code looks like: r2 = *(u64 *)(r1 +208) r2 = (s32)r2 r3 = *(u64 *)(r1 +80) r0 = r2 r0 += 8 if r3 > r0 goto pc+1 ... Note that 'r2 = (s32)r2' may make the kernel __sk_buff->data address invalid which may cause runtime failure. Currently, in C code, typically we have void *data = (void *)(long)skb->data; void *data_end = (void *)(long)skb->data_end; ... and it will generate r2 = *(u64 *)(r1 +208) r3 = *(u64 *)(r1 +80) r0 = r2 r0 += 8 if r3 > r0 goto pc+1 If we allow sign-extension, void *data = (void *)(long)(int)skb->data; void *data_end = (void *)(long)skb->data_end; ... the generated code looks like r2 = *(u64 *)(r1 +208) r2 <<= 32 r2 s>>= 32 r3 = *(u64 *)(r1 +80) r0 = r2 r0 += 8 if r3 > r0 goto pc+1 and this will cause verification failure since "r2 <<= 32" is not allowed as "r2" is a packet pointer. To fix this issue for case r2 = *(s32 *)(r1 + 76) /* load __sk_buff->data */ this patch added additional checking in is_valid_access() callback function for packet data/data_end/data_meta access. If those accesses are with sign-extenstion, the verification will fail. [1] https://lore.kernel.org/bpf/000000000000c90eee061d236d37@google.com/
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/92de36080c93296ef9005690705cba260b9bd68aPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f09757fe97a225ae505886eac572e4cbfba96537Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f1620c93a1ec950d87ef327a565d3907736d3340Patch
Impacted products
Vendor Product Version
Linux Linux Version: 1f1e864b65554e33fe74e3377e58b12f4302f2eb
Version: 1f1e864b65554e33fe74e3377e58b12f4302f2eb
Version: 1f1e864b65554e33fe74e3377e58b12f4302f2eb
 Create a notification for this product.
   Linux Linux Version: 6.6
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-47702",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-10-21T13:04:24.861686Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-10-21T13:14:13.443Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "include/linux/bpf.h",
            "kernel/bpf/verifier.c",
            "net/core/filter.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "f1620c93a1ec950d87ef327a565d3907736d3340",
              "status": "affected",
              "version": "1f1e864b65554e33fe74e3377e58b12f4302f2eb",
              "versionType": "git"
            },
            {
              "lessThan": "f09757fe97a225ae505886eac572e4cbfba96537",
              "status": "affected",
              "version": "1f1e864b65554e33fe74e3377e58b12f4302f2eb",
              "versionType": "git"
            },
            {
              "lessThan": "92de36080c93296ef9005690705cba260b9bd68a",
              "status": "affected",
              "version": "1f1e864b65554e33fe74e3377e58b12f4302f2eb",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "include/linux/bpf.h",
            "kernel/bpf/verifier.c",
            "net/core/filter.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.6"
            },
            {
              "lessThan": "6.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.10.*",
              "status": "unaffected",
              "version": "6.10.13",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.11.*",
              "status": "unaffected",
              "version": "6.11.2",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.12",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fail verification for sign-extension of packet data/data_end/data_meta\n\nsyzbot reported a kernel crash due to\n  commit 1f1e864b6555 (\"bpf: Handle sign-extenstin ctx member accesses\").\nThe reason is due to sign-extension of 32-bit load for\npacket data/data_end/data_meta uapi field.\n\nThe original code looks like:\n        r2 = *(s32 *)(r1 + 76) /* load __sk_buff-\u003edata */\n        r3 = *(u32 *)(r1 + 80) /* load __sk_buff-\u003edata_end */\n        r0 = r2\n        r0 += 8\n        if r3 \u003e r0 goto +1\n        ...\nNote that __sk_buff-\u003edata load has 32-bit sign extension.\n\nAfter verification and convert_ctx_accesses(), the final asm code looks like:\n        r2 = *(u64 *)(r1 +208)\n        r2 = (s32)r2\n        r3 = *(u64 *)(r1 +80)\n        r0 = r2\n        r0 += 8\n        if r3 \u003e r0 goto pc+1\n        ...\nNote that \u0027r2 = (s32)r2\u0027 may make the kernel __sk_buff-\u003edata address invalid\nwhich may cause runtime failure.\n\nCurrently, in C code, typically we have\n        void *data = (void *)(long)skb-\u003edata;\n        void *data_end = (void *)(long)skb-\u003edata_end;\n        ...\nand it will generate\n        r2 = *(u64 *)(r1 +208)\n        r3 = *(u64 *)(r1 +80)\n        r0 = r2\n        r0 += 8\n        if r3 \u003e r0 goto pc+1\n\nIf we allow sign-extension,\n        void *data = (void *)(long)(int)skb-\u003edata;\n        void *data_end = (void *)(long)skb-\u003edata_end;\n        ...\nthe generated code looks like\n        r2 = *(u64 *)(r1 +208)\n        r2 \u003c\u003c= 32\n        r2 s\u003e\u003e= 32\n        r3 = *(u64 *)(r1 +80)\n        r0 = r2\n        r0 += 8\n        if r3 \u003e r0 goto pc+1\nand this will cause verification failure since \"r2 \u003c\u003c= 32\" is not allowed\nas \"r2\" is a packet pointer.\n\nTo fix this issue for case\n  r2 = *(s32 *)(r1 + 76) /* load __sk_buff-\u003edata */\nthis patch added additional checking in is_valid_access() callback\nfunction for packet data/data_end/data_meta access. If those accesses\nare with sign-extenstion, the verification will fail.\n\n  [1] https://lore.kernel.org/bpf/000000000000c90eee061d236d37@google.com/"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2024-12-19T09:26:24.243Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/f1620c93a1ec950d87ef327a565d3907736d3340"
        },
        {
          "url": "https://git.kernel.org/stable/c/f09757fe97a225ae505886eac572e4cbfba96537"
        },
        {
          "url": "https://git.kernel.org/stable/c/92de36080c93296ef9005690705cba260b9bd68a"
        }
      ],
      "title": "bpf: Fail verification for sign-extension of packet data/data_end/data_meta",
      "x_generator": {
        "engine": "bippy-5f407fcff5a0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-47702",
    "datePublished": "2024-10-21T11:53:37.958Z",
    "dateReserved": "2024-09-30T16:00:12.945Z",
    "dateUpdated": "2024-12-19T09:26:24.243Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2024-47702\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-10-21T12:15:06.743\",\"lastModified\":\"2024-10-24T13:30:59.247\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nbpf: Fail verification for sign-extension of packet data/data_end/data_meta\\n\\nsyzbot reported a kernel crash due to\\n  commit 1f1e864b6555 (\\\"bpf: Handle sign-extenstin ctx member accesses\\\").\\nThe reason is due to sign-extension of 32-bit load for\\npacket data/data_end/data_meta uapi field.\\n\\nThe original code looks like:\\n        r2 = *(s32 *)(r1 + 76) /* load __sk_buff-\u003edata */\\n        r3 = *(u32 *)(r1 + 80) /* load __sk_buff-\u003edata_end */\\n        r0 = r2\\n        r0 += 8\\n        if r3 \u003e r0 goto +1\\n        ...\\nNote that __sk_buff-\u003edata load has 32-bit sign extension.\\n\\nAfter verification and convert_ctx_accesses(), the final asm code looks like:\\n        r2 = *(u64 *)(r1 +208)\\n        r2 = (s32)r2\\n        r3 = *(u64 *)(r1 +80)\\n        r0 = r2\\n        r0 += 8\\n        if r3 \u003e r0 goto pc+1\\n        ...\\nNote that \u0027r2 = (s32)r2\u0027 may make the kernel __sk_buff-\u003edata address invalid\\nwhich may cause runtime failure.\\n\\nCurrently, in C code, typically we have\\n        void *data = (void *)(long)skb-\u003edata;\\n        void *data_end = (void *)(long)skb-\u003edata_end;\\n        ...\\nand it will generate\\n        r2 = *(u64 *)(r1 +208)\\n        r3 = *(u64 *)(r1 +80)\\n        r0 = r2\\n        r0 += 8\\n        if r3 \u003e r0 goto pc+1\\n\\nIf we allow sign-extension,\\n        void *data = (void *)(long)(int)skb-\u003edata;\\n        void *data_end = (void *)(long)skb-\u003edata_end;\\n        ...\\nthe generated code looks like\\n        r2 = *(u64 *)(r1 +208)\\n        r2 \u003c\u003c= 32\\n        r2 s\u003e\u003e= 32\\n        r3 = *(u64 *)(r1 +80)\\n        r0 = r2\\n        r0 += 8\\n        if r3 \u003e r0 goto pc+1\\nand this will cause verification failure since \\\"r2 \u003c\u003c= 32\\\" is not allowed\\nas \\\"r2\\\" is a packet pointer.\\n\\nTo fix this issue for case\\n  r2 = *(s32 *)(r1 + 76) /* load __sk_buff-\u003edata */\\nthis patch added additional checking in is_valid_access() callback\\nfunction for packet data/data_end/data_meta access. If those accesses\\nare with sign-extenstion, the verification will fail.\\n\\n  [1] https://lore.kernel.org/bpf/000000000000c90eee061d236d37@google.com/\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: bpf: Error en la verificaci\u00f3n de la extensi\u00f3n de signo del paquete data/data_end/data_meta syzbot inform\u00f3 de un fallo del kernel debido a el commit 1f1e864b6555 (\\\"bpf: Manejar los accesos a miembros ctx de la extensi\u00f3n de signo\\\"). La raz\u00f3n se debe a la extensi\u00f3n de signo de la carga de 32 bits para el campo uapi del paquete data/data_end/data_meta. El c\u00f3digo original se ve as\u00ed: r2 = *(s32 *)(r1 + 76) /* load __sk_buff-\u0026gt;data */ r3 = *(u32 *)(r1 + 80) /* load __sk_buff-\u0026gt;data_end */ r0 = r2 r0 += 8 if r3 \u0026gt; r0 goto +1 ... Tenga en cuenta que la carga de __sk_buff-\u0026gt;data tiene una extensi\u00f3n de signo de 32 bits. Despu\u00e9s de la verificaci\u00f3n y convert_ctx_accesses(), el c\u00f3digo asm final se ve as\u00ed: r2 = *(u64 *)(r1 +208) r2 = (s32)r2 r3 = *(u64 *)(r1 +80) r0 = r2 r0 += 8 if r3 \u0026gt; r0 goto pc+1 ... Tenga en cuenta que \u0027r2 = (s32)r2\u0027 puede hacer que la direcci\u00f3n __sk_buff-\u0026gt;data del n\u00facleo sea inv\u00e1lida, lo que puede causar un error en tiempo de ejecuci\u00f3n. Actualmente, en el c\u00f3digo C, normalmente tenemos void *data = (void *)(long)skb-\u0026gt;data; void *data_end = (void *)(long)skb-\u0026gt;data_end; ... y generar\u00e1 r2 = *(u64 *)(r1 +208) r3 = *(u64 *)(r1 +80) r0 = r2 r0 += 8 if r3 \u0026gt; r0 goto pc+1 Si permitimos la extensi\u00f3n de signo, void *data = (void *)(long)(int)skb-\u0026gt;data; void *data_end = (void *)(long)skb-\u0026gt;data_end; ... el c\u00f3digo generado se ve as\u00ed r2 = *(u64 *)(r1 +208) r2 \u0026lt;\u0026lt;= 32 r2 s\u0026gt;\u0026gt;= 32 r3 = *(u64 *)(r1 +80) r0 = r2 r0 += 8 if r3 \u0026gt; r0 goto pc+1 y esto causar\u00e1 un error de verificaci\u00f3n ya que \\\"r2 \u0026lt;\u0026lt;= 32\\\" no est\u00e1 permitido ya que \\\"r2\\\" es un puntero de paquete. Para solucionar este problema en el caso r2 = *(s32 *)(r1 + 76) /* load __sk_buff-\u0026gt;data */, este parche agreg\u00f3 una verificaci\u00f3n adicional en la funci\u00f3n de devoluci\u00f3n de llamada is_valid_access() para el acceso a los paquetes data/data_end/data_meta. Si esos accesos son con la extensi\u00f3n sign-extenstion, la verificaci\u00f3n fallar\u00e1. [1] https://lore.kernel.org/bpf/000000000000c90eee061d236d37@google.com/\"}],\"metrics\":{\"cvssMetricV31\":[{\"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}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.6\",\"versionEndExcluding\":\"6.10.13\",\"matchCriteriaId\":\"5E608BB9-C140-4A10-AE7A-FC5B5D4C1972\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.11\",\"versionEndExcluding\":\"6.11.2\",\"matchCriteriaId\":\"AB755D26-97F4-43B6-8604-CD076811E181\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/92de36080c93296ef9005690705cba260b9bd68a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/f09757fe97a225ae505886eac572e4cbfba96537\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/f1620c93a1ec950d87ef327a565d3907736d3340\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2024-47702\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-10-21T13:04:24.861686Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-10-21T13:04:28.636Z\"}}], \"cna\": {\"title\": \"bpf: Fail verification for sign-extension of packet data/data_end/data_meta\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"1f1e864b65554e33fe74e3377e58b12f4302f2eb\", \"lessThan\": \"f1620c93a1ec950d87ef327a565d3907736d3340\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1f1e864b65554e33fe74e3377e58b12f4302f2eb\", \"lessThan\": \"f09757fe97a225ae505886eac572e4cbfba96537\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"1f1e864b65554e33fe74e3377e58b12f4302f2eb\", \"lessThan\": \"92de36080c93296ef9005690705cba260b9bd68a\", \"versionType\": \"git\"}], \"programFiles\": [\"include/linux/bpf.h\", \"kernel/bpf/verifier.c\", \"net/core/filter.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.6\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"6.6\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.10.13\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.10.*\"}, {\"status\": \"unaffected\", \"version\": \"6.11.2\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.11.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"include/linux/bpf.h\", \"kernel/bpf/verifier.c\", \"net/core/filter.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/f1620c93a1ec950d87ef327a565d3907736d3340\"}, {\"url\": \"https://git.kernel.org/stable/c/f09757fe97a225ae505886eac572e4cbfba96537\"}, {\"url\": \"https://git.kernel.org/stable/c/92de36080c93296ef9005690705cba260b9bd68a\"}], \"x_generator\": {\"engine\": \"bippy-5f407fcff5a0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nbpf: Fail verification for sign-extension of packet data/data_end/data_meta\\n\\nsyzbot reported a kernel crash due to\\n  commit 1f1e864b6555 (\\\"bpf: Handle sign-extenstin ctx member accesses\\\").\\nThe reason is due to sign-extension of 32-bit load for\\npacket data/data_end/data_meta uapi field.\\n\\nThe original code looks like:\\n        r2 = *(s32 *)(r1 + 76) /* load __sk_buff-\u003edata */\\n        r3 = *(u32 *)(r1 + 80) /* load __sk_buff-\u003edata_end */\\n        r0 = r2\\n        r0 += 8\\n        if r3 \u003e r0 goto +1\\n        ...\\nNote that __sk_buff-\u003edata load has 32-bit sign extension.\\n\\nAfter verification and convert_ctx_accesses(), the final asm code looks like:\\n        r2 = *(u64 *)(r1 +208)\\n        r2 = (s32)r2\\n        r3 = *(u64 *)(r1 +80)\\n        r0 = r2\\n        r0 += 8\\n        if r3 \u003e r0 goto pc+1\\n        ...\\nNote that \u0027r2 = (s32)r2\u0027 may make the kernel __sk_buff-\u003edata address invalid\\nwhich may cause runtime failure.\\n\\nCurrently, in C code, typically we have\\n        void *data = (void *)(long)skb-\u003edata;\\n        void *data_end = (void *)(long)skb-\u003edata_end;\\n        ...\\nand it will generate\\n        r2 = *(u64 *)(r1 +208)\\n        r3 = *(u64 *)(r1 +80)\\n        r0 = r2\\n        r0 += 8\\n        if r3 \u003e r0 goto pc+1\\n\\nIf we allow sign-extension,\\n        void *data = (void *)(long)(int)skb-\u003edata;\\n        void *data_end = (void *)(long)skb-\u003edata_end;\\n        ...\\nthe generated code looks like\\n        r2 = *(u64 *)(r1 +208)\\n        r2 \u003c\u003c= 32\\n        r2 s\u003e\u003e= 32\\n        r3 = *(u64 *)(r1 +80)\\n        r0 = r2\\n        r0 += 8\\n        if r3 \u003e r0 goto pc+1\\nand this will cause verification failure since \\\"r2 \u003c\u003c= 32\\\" is not allowed\\nas \\\"r2\\\" is a packet pointer.\\n\\nTo fix this issue for case\\n  r2 = *(s32 *)(r1 + 76) /* load __sk_buff-\u003edata */\\nthis patch added additional checking in is_valid_access() callback\\nfunction for packet data/data_end/data_meta access. If those accesses\\nare with sign-extenstion, the verification will fail.\\n\\n  [1] https://lore.kernel.org/bpf/000000000000c90eee061d236d37@google.com/\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-12-19T09:26:24.243Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-47702\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-12-19T09:26:24.243Z\", \"dateReserved\": \"2024-09-30T16:00:12.945Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-10-21T11:53:37.958Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.