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xfs: validate attr entry pointer before field access

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: xfs: validate attr entry pointer before field access xfs_attr3_leaf_verify_entry() accesses lentry/rentry fields (namelen, valuelen) before checking if the entry pointer itself is within bounds. If nameidx is crafted to point near the end of the buffer, these field accesses can read out-of-bounds before the bounds check at name_end > buf_end is performed. Add explicit bounds checks for entry pointers before accessing their fields. Use offsetof() to check that the start of the flexible array member (nameval/name) is within bounds, which ensures all preceding fields are safe to access.

Announced Source revision 1
Original source ↗

CVE-2026-80805

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-80805

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "c84760659dcf237902d4cc997cd5f55cb3b2807f",
        "lessThan": "0f82586741e39926542f621bafa424e237a04fa4",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c84760659dcf237902d4cc997cd5f55cb3b2807f",
        "lessThan": "134d82a2b5e3eba3ebf58753a1387b22f26ca1de",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c84760659dcf237902d4cc997cd5f55cb3b2807f",
        "lessThan": "03a12253dd2a036545bdb0110a4e0b8dc70f8e7c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c84760659dcf237902d4cc997cd5f55cb3b2807f",
        "lessThan": "e99120b5944a16d0bc27e52b33de78bcdaaabf5c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c84760659dcf237902d4cc997cd5f55cb3b2807f",
        "lessThan": "98a42bb9d60d42898c3494de351a1bf508348cde",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c84760659dcf237902d4cc997cd5f55cb3b2807f",
        "lessThan": "184c1a80421a5b5ddcd262e47980ce2e67fee211",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c84760659dcf237902d4cc997cd5f55cb3b2807f",
        "lessThan": "9f92e749fc08b7ff3d9da190c4d1b2273745b282",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c84760659dcf237902d4cc997cd5f55cb3b2807f",
        "lessThan": "c35da2bac6f7cb9a9be73f188b4fcc324615c327",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c84760659dcf237902d4cc997cd5f55cb3b2807f",
        "lessThan": "b7eea80be25f3334f131d52982b3131aba77b97d",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "fs/xfs/libxfs/xfs_attr_leaf.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "5.5"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "5.5",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.267",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.218",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.185",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.154",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.106",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.47",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.1.11",
        "versionType": "semver",
        "lessThanOrEqual": "7.1.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.1",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "fs/xfs/libxfs/xfs_attr_leaf.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-80805

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#34822 · Revision 1
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Publisher date
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