Vulnerability-Lookup

GHSA-HQFW-8GWG-7R3Q

Vulnerability from github – Published: 2024-08-17 12:30 – Updated: 2025-11-04 00:31

Details

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

5.5 (Medium)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2024-43854"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-401"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-08-17T10:15:10Z",
    "severity": "MODERATE"
  },
  "details": "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.",
  "id": "GHSA-hqfw-8gwg-7r3q",
  "modified": "2025-11-04T00:31:16Z",
  "published": "2024-08-17T12:30:33Z",
  "references": [
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      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-43854"
    },
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      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/129f95948a96105c1fad8e612c9097763e88ac5f"
    },
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      "url": "https://git.kernel.org/stable/c/3fd11fe4f20756b4c0847f755a64cd96f8c6a005"
    },
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}

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

Vulnerability from cvelistv5 – Published: 2024-08-17 09:22 – Updated: 2026-05-11 20:31

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.

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-09-10 16:07 UTC

Assigner

Linux mitre root Scorecard

References

10 references

URL	Tags
https://git.kernel.org/stable/c/9f4af4cf08f9a0329…
https://git.kernel.org/stable/c/129f95948a96105c1…
https://git.kernel.org/stable/c/3fd11fe4f20756b4c…
https://git.kernel.org/stable/c/cf6b45ea7a8df0f61…
https://git.kernel.org/stable/c/d418313bd8f55c079…
https://git.kernel.org/stable/c/23a19655fb56f241e…
https://git.kernel.org/stable/c/ebc0e91ba76dc6544…
https://git.kernel.org/stable/c/899ee2c3829c5ac14…
https://lists.debian.org/debian-lts-announce/2025…
https://lists.debian.org/debian-lts-announce/2024…

Impacted products

2 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)
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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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.

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.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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GHSA-HQFW-8GWG-7R3Q

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

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