CVE-2024-40974 (GCVE-0-2024-40974)

Vulnerability from cvelistv5 – Published: 2024-07-12 12:32 – Updated: 2025-11-03 21:58
VLAI?
Summary
In the Linux kernel, the following vulnerability has been resolved: powerpc/pseries: Enforce hcall result buffer validity and size plpar_hcall(), plpar_hcall9(), and related functions expect callers to provide valid result buffers of certain minimum size. Currently this is communicated only through comments in the code and the compiler has no idea. For example, if I write a bug like this: long retbuf[PLPAR_HCALL_BUFSIZE]; // should be PLPAR_HCALL9_BUFSIZE plpar_hcall9(H_ALLOCATE_VAS_WINDOW, retbuf, ...); This compiles with no diagnostics emitted, but likely results in stack corruption at runtime when plpar_hcall9() stores results past the end of the array. (To be clear this is a contrived example and I have not found a real instance yet.) To make this class of error less likely, we can use explicitly-sized array parameters instead of pointers in the declarations for the hcall APIs. When compiled with -Warray-bounds[1], the code above now provokes a diagnostic like this: error: array argument is too small; is of size 32, callee requires at least 72 [-Werror,-Warray-bounds] 60 | plpar_hcall9(H_ALLOCATE_VAS_WINDOW, retbuf, | ^ ~~~~~~ [1] Enabled for LLVM builds but not GCC for now. See commit 0da6e5fd6c37 ("gcc: disable '-Warray-bounds' for gcc-13 too") and related changes.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < acf2b80c31c37acab040baa3cf5f19fbd5140b18 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 19c166ee42cf16d8b156a6cb4544122d9a65d3ca (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < a8c988d752b3d98d5cc1e3929c519a55ef55426c (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 262e942ff5a839b9e4f3302a8987928b0c8b8a2d (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 8aa11aa001576bf3b00dcb8559564ad7a3113588 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 3ad0034910a57aa88ed9976b1431b7b8c84e0048 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < aa6107dcc4ce9a3451f2d729204713783b657257 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < ff2e185cf73df480ec69675936c4ee75a445c3e4 (git)
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    Linux Linux Unaffected: 4.19.317 , ≤ 4.19.* (semver)
Unaffected: 5.4.279 , ≤ 5.4.* (semver)
Unaffected: 5.10.221 , ≤ 5.10.* (semver)
Unaffected: 5.15.162 , ≤ 5.15.* (semver)
Unaffected: 6.1.96 , ≤ 6.1.* (semver)
Unaffected: 6.6.36 , ≤ 6.6.* (semver)
Unaffected: 6.9.7 , ≤ 6.9.* (semver)
Unaffected: 6.10 , ≤ * (original_commit_for_fix)
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(To be clear this is a contrived example and I have not\\nfound a real instance yet.)\\n\\nTo make this class of error less likely, we can use explicitly-sized\\narray parameters instead of pointers in the declarations for the hcall\\nAPIs. When compiled with -Warray-bounds[1], the code above now\\nprovokes a diagnostic like this:\\n\\nerror: array argument is too small;\\nis of size 32, callee requires at least 72 [-Werror,-Warray-bounds]\\n   60 |                 plpar_hcall9(H_ALLOCATE_VAS_WINDOW, retbuf,\\n      |                 ^                                   ~~~~~~\\n\\n[1] Enabled for LLVM builds but not GCC for now. See commit\\n    0da6e5fd6c37 (\\\"gcc: disable \u0027-Warray-bounds\u0027 for gcc-13 too\\\") and\\n    related changes.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: powerpc/pseries: aplica la validez y el tama\u00f1o del b\u00fafer de resultados de hcall plpar_hcall(), plpar_hcall9() y las funciones relacionadas esperan que los llamadores proporcionen b\u00faferes de resultados v\u00e1lidos de cierto tama\u00f1o m\u00ednimo. Actualmente esto se comunica s\u00f3lo a trav\u00e9s de comentarios en el c\u00f3digo y el compilador no tiene idea. Por ejemplo, si escribo un error como este: long retbuf[PLPAR_HCALL_BUFSIZE]; // deber\u00eda ser PLPAR_HCALL9_BUFSIZE plpar_hcall9(H_ALLOCATE_VAS_WINDOW, retbuf, ...); Esto se compila sin emitir diagn\u00f3sticos, pero probablemente da como resultado da\u00f1os en la pila en tiempo de ejecuci\u00f3n cuando plpar_hcall9() almacena los resultados m\u00e1s all\u00e1 del final de la matriz. (Para ser claros, este es un ejemplo artificial y todav\u00eda no he encontrado una instancia real). Para hacer que esta clase de error sea menos probable, podemos usar par\u00e1metros de matriz de tama\u00f1o expl\u00edcito en lugar de punteros en las declaraciones de las API hcall. Cuando se compila con -Warray-bounds[1], el c\u00f3digo anterior ahora provoca un diagn\u00f3stico como este: error: el argumento de la matriz es demasiado peque\u00f1o; es de tama\u00f1o 32, el destinatario requiere al menos 72 [-Werror,-Warray-bounds] 60 | plpar_hcall9(H_ALLOCATE_VAS_WINDOW, retbuf, | ^ ~~~~~~ [1] Habilitado para compilaciones LLVM pero no para GCC por ahora. Consulte El commit 0da6e5fd6c37 (\\\"gcc: deshabilite \u0027-Warray-bounds\u0027 para gcc-13 tambi\u00e9n\\\") y relacionados cambios.\"}],\"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:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"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:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"4.19.317\",\"matchCriteriaId\":\"AD25C2E5-C116-4160-BA6D-CE9B0D10AE3E\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.20\",\"versionEndExcluding\":\"5.4.279\",\"matchCriteriaId\":\"F4E38E58-1B9F-4DF2-AD3D-A8BEAA2959D8\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.221\",\"matchCriteriaId\":\"659E1520-6345-41AF-B893-A7C0647585A0\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.162\",\"matchCriteriaId\":\"10A39ACC-3005-40E8-875C-98A372D1FFD5\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.96\",\"matchCriteriaId\":\"61E887B4-732A-40D2-9983-CC6F281EBFB7\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.36\",\"matchCriteriaId\":\"E1046C95-860A-45B0-B718-2B29F65BFF10\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.9.7\",\"matchCriteriaId\":\"0A047AF2-94AC-4A3A-B32D-6AB930D8EF1C\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/19c166ee42cf16d8b156a6cb4544122d9a65d3ca\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/262e942ff5a839b9e4f3302a8987928b0c8b8a2d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/3ad0034910a57aa88ed9976b1431b7b8c84e0048\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/8aa11aa001576bf3b00dcb8559564ad7a3113588\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/a8c988d752b3d98d5cc1e3929c519a55ef55426c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/aa6107dcc4ce9a3451f2d729204713783b657257\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/acf2b80c31c37acab040baa3cf5f19fbd5140b18\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ff2e185cf73df480ec69675936c4ee75a445c3e4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/19c166ee42cf16d8b156a6cb4544122d9a65d3ca\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/262e942ff5a839b9e4f3302a8987928b0c8b8a2d\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/3ad0034910a57aa88ed9976b1431b7b8c84e0048\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/8aa11aa001576bf3b00dcb8559564ad7a3113588\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/a8c988d752b3d98d5cc1e3929c519a55ef55426c\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/aa6107dcc4ce9a3451f2d729204713783b657257\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/acf2b80c31c37acab040baa3cf5f19fbd5140b18\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ff2e185cf73df480ec69675936c4ee75a445c3e4\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\",\"tags\":[\"Patch\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}",
    "vulnrichment": {
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When compiled with -Warray-bounds[1], the code above now\\nprovokes a diagnostic like this:\\n\\nerror: array argument is too small;\\nis of size 32, callee requires at least 72 [-Werror,-Warray-bounds]\\n   60 |                 plpar_hcall9(H_ALLOCATE_VAS_WINDOW, retbuf,\\n      |                 ^                                   ~~~~~~\\n\\n[1] Enabled for LLVM builds but not GCC for now. 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      "cveMetadata": "{\"cveId\": \"CVE-2024-40974\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-11-03T21:58:39.132Z\", \"dateReserved\": \"2024-07-12T12:17:45.603Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-07-12T12:32:11.417Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Sightings

Author Source Type Date

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.