Vulnerability-Lookup

GHSA-83H3-PMWM-WJ9J

Vulnerability from github – Published: 2025-03-27 18:31 – Updated: 2026-01-19 15:30

Details

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

ovl: Use "buf" flexible array for memcpy() destination

The "buf" flexible array needs to be the memcpy() destination to avoid false positive run-time warning from the recent FORTIFY_SOURCE hardening:

memcpy: detected field-spanning write (size 93) of single field "&fh->fb" at fs/overlayfs/export.c:799 (size 21)

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-2022-49743"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-03-27T17:15:38Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\novl: Use \"buf\" flexible array for memcpy() destination\n\nThe \"buf\" flexible array needs to be the memcpy() destination to avoid\nfalse positive run-time warning from the recent FORTIFY_SOURCE\nhardening:\n\n  memcpy: detected field-spanning write (size 93) of single field \"\u0026fh-\u003efb\"\n  at fs/overlayfs/export.c:799 (size 21)",
  "id": "GHSA-83h3-pmwm-wj9j",
  "modified": "2026-01-19T15:30:32Z",
  "published": "2025-03-27T18:31:23Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49743"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/012cdef22000f3104e4fa8224ad29fde509b8caf"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/07a96977b2f462337a9121302de64277b8747ab1"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a77141a06367825d639ac51b04703d551163e36c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cf8aa9bf97cadf85745506c6a3e244b22c268d63"
    }
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  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2022-49743 (GCVE-0-2022-49743)

Vulnerability from cvelistv5 – Published: 2025-03-27 16:42 – Updated: 2026-10-15 21:21

Title

ovl: Use "buf" flexible array for memcpy() destination

Summary

In the Linux kernel, the following vulnerability has been resolved: ovl: Use "buf" flexible array for memcpy() destination The "buf" flexible array needs to be the memcpy() destination to avoid false positive run-time warning from the recent FORTIFY_SOURCE hardening: memcpy: detected field-spanning write (size 93) of single field "&fh->fb" at fs/overlayfs/export.c:799 (size 21)

Severity

7.5 (High)


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

SSVC

Exploitation: none Automatable: yes Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-15 21:18 UTC

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 7018 records in the last 180 days details

References

4 references

URL	Tags
https://git.kernel.org/stable/c/012cdef22000f3104…
https://git.kernel.org/stable/c/a77141a06367825d6…
https://git.kernel.org/stable/c/07a96977b2f462337…
https://git.kernel.org/stable/c/cf8aa9bf97cadf857…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: cbe7fba8edfc8cb8e621599e376f8ac5c224fa72 , < 012cdef22000f3104e4fa8224ad29fde509b8caf (git) Affected: cbe7fba8edfc8cb8e621599e376f8ac5c224fa72 , < a77141a06367825d639ac51b04703d551163e36c (git) Affected: cbe7fba8edfc8cb8e621599e376f8ac5c224fa72 , < 07a96977b2f462337a9121302de64277b8747ab1 (git) Affected: cbe7fba8edfc8cb8e621599e376f8ac5c224fa72 , < cf8aa9bf97cadf85745506c6a3e244b22c268d63 (git)
Linux	Linux	Affected: 5.5 Unaffected: 0 , < 5.5 (semver) Unaffected: 5.10.248 , ≤ 5.10.* (semver) Unaffected: 5.15.93 , ≤ 5.15.* (semver) Unaffected: 6.1.11 , ≤ 6.1.* (semver) Unaffected: 6.2 , ≤ * (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.

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