CVE-2024-43854 (GCVE-0-2024-43854)

Vulnerability from cvelistv5 – Published: 2024-08-17 09:22 – Updated: 2026-05-11 20:31
VLAI
Title
block: initialize integrity buffer to zero before writing it to media
Summary
In the Linux kernel, the following vulnerability has been resolved: block: initialize integrity buffer to zero before writing it to media Metadata added by bio_integrity_prep is using plain kmalloc, which leads to random kernel memory being written media. For PI metadata this is limited to the app tag that isn't used by kernel generated metadata, but for non-PI metadata the entire buffer leaks kernel memory. Fix this by adding the __GFP_ZERO flag to allocations for writes.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 7ba1ba12eeef0aa7113beb16410ef8b7c748e18b , < 9f4af4cf08f9a0329ade3d938f55d2220c40d0a6 (git)
Affected: 7ba1ba12eeef0aa7113beb16410ef8b7c748e18b , < 129f95948a96105c1fad8e612c9097763e88ac5f (git)
Affected: 7ba1ba12eeef0aa7113beb16410ef8b7c748e18b , < 3fd11fe4f20756b4c0847f755a64cd96f8c6a005 (git)
Affected: 7ba1ba12eeef0aa7113beb16410ef8b7c748e18b , < cf6b45ea7a8df0f61bded1dc4a8561ac6ad143d2 (git)
Affected: 7ba1ba12eeef0aa7113beb16410ef8b7c748e18b , < d418313bd8f55c079a7da12651951b489a638ac1 (git)
Affected: 7ba1ba12eeef0aa7113beb16410ef8b7c748e18b , < 23a19655fb56f241e592041156dfb1c6d04da644 (git)
Affected: 7ba1ba12eeef0aa7113beb16410ef8b7c748e18b , < ebc0e91ba76dc6544fff9f5b66408b1982806a00 (git)
Affected: 7ba1ba12eeef0aa7113beb16410ef8b7c748e18b , < 899ee2c3829c5ac14bfc7d3c4a5846c0b709b78f (git)
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Linux Linux Affected: 2.6.27
Unaffected: 0 , < 2.6.27 (semver)
Unaffected: 4.19.322 , ≤ 4.19.* (semver)
Unaffected: 5.4.284 , ≤ 5.4.* (semver)
Unaffected: 5.10.226 , ≤ 5.10.* (semver)
Unaffected: 5.15.165 , ≤ 5.15.* (semver)
Unaffected: 6.1.103 , ≤ 6.1.* (semver)
Unaffected: 6.6.44 , ≤ 6.6.* (semver)
Unaffected: 6.10.3 , ≤ 6.10.* (semver)
Unaffected: 6.11 , ≤ * (original_commit_for_fix)
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    "nvd": "{\"cve\":{\"id\":\"CVE-2024-43854\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-08-17T10:15:10.447\",\"lastModified\":\"2025-11-03T22:18:11.257\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nblock: initialize integrity buffer to zero before writing it to media\\n\\nMetadata added by bio_integrity_prep is using plain kmalloc, which leads\\nto random kernel memory being written media.  For PI metadata this is\\nlimited to the app tag that isn\u0027t used by kernel generated metadata,\\nbut for non-PI metadata the entire buffer leaks kernel memory.\\n\\nFix this by adding the __GFP_ZERO flag to allocations for writes.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: bloque: inicializa el b\u00fafer de integridad a cero antes de escribirlo en el medio. Los metadatos agregados por bio_integrity_prep utilizan kmalloc simple, lo que lleva a que la memoria del kernel se escriba en el medio de forma aleatoria. Para los metadatos de PI, esto se limita a la etiqueta de la aplicaci\u00f3n que no es utilizada por los metadatos generados por el kernel, pero para los metadatos que no son de PI, todo el b\u00fafer pierde memoria del kernel. Solucione este problema agregando el indicador __GFP_ZERO a las asignaciones para escrituras.\"}],\"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\":\"CWE-401\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"2.6.27\",\"versionEndExcluding\":\"5.15.165\",\"matchCriteriaId\":\"281A9189-26A2-46A1-ABED-BB34ABC26FDD\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.103\",\"matchCriteriaId\":\"E45EAC72-8329-4F99-8276-86AF9BB3496A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.44\",\"matchCriteriaId\":\"CC912330-6B41-4C6B-99AF-F3857FBACB6A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.10.3\",\"matchCriteriaId\":\"92D388F2-1EAF-4CFA-AC06-5B26D762EA7D\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/129f95948a96105c1fad8e612c9097763e88ac5f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/23a19655fb56f241e592041156dfb1c6d04da644\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/3fd11fe4f20756b4c0847f755a64cd96f8c6a005\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/899ee2c3829c5ac14bfc7d3c4a5846c0b709b78f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/9f4af4cf08f9a0329ade3d938f55d2220c40d0a6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/cf6b45ea7a8df0f61bded1dc4a8561ac6ad143d2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d418313bd8f55c079a7da12651951b489a638ac1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ebc0e91ba76dc6544fff9f5b66408b1982806a00\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"},{\"url\":\"https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html\",\"source\":\"af854a3a-2127-422b-91ae-364da2661108\"}]}}",
    "vulnrichment": {
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      "cveMetadata": "{\"cveId\": \"CVE-2024-43854\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-11T20:31:06.290Z\", \"dateReserved\": \"2024-08-17T09:11:59.278Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-08-17T09:22:11.297Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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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.