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FKIE_CVE-2026-80805

Vulnerability from fkie_nvd - Published: 2026-09-04 16:18 - Updated: 2026-09-04 16:18
Severity
Summary
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/03a12253dd2a036545bdb0110a4e0b8dc70f8e7c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/0f82586741e39926542f621bafa424e237a04fa4
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/134d82a2b5e3eba3ebf58753a1387b22f26ca1de
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/184c1a80421a5b5ddcd262e47980ce2e67fee211
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/98a42bb9d60d42898c3494de351a1bf508348cde
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9f92e749fc08b7ff3d9da190c4d1b2273745b282
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b7eea80be25f3334f131d52982b3131aba77b97d
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c35da2bac6f7cb9a9be73f188b4fcc324615c327
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e99120b5944a16d0bc27e52b33de78bcdaaabf5c
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/xfs/libxfs/xfs_attr_leaf.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "0f82586741e39926542f621bafa424e237a04fa4",
              "status": "affected",
              "version": "c84760659dcf237902d4cc997cd5f55cb3b2807f",
              "versionType": "git"
            },
            {
              "lessThan": "134d82a2b5e3eba3ebf58753a1387b22f26ca1de",
              "status": "affected",
              "version": "c84760659dcf237902d4cc997cd5f55cb3b2807f",
              "versionType": "git"
            },
            {
              "lessThan": "03a12253dd2a036545bdb0110a4e0b8dc70f8e7c",
              "status": "affected",
              "version": "c84760659dcf237902d4cc997cd5f55cb3b2807f",
              "versionType": "git"
            },
            {
              "lessThan": "e99120b5944a16d0bc27e52b33de78bcdaaabf5c",
              "status": "affected",
              "version": "c84760659dcf237902d4cc997cd5f55cb3b2807f",
              "versionType": "git"
            },
            {
              "lessThan": "98a42bb9d60d42898c3494de351a1bf508348cde",
              "status": "affected",
              "version": "c84760659dcf237902d4cc997cd5f55cb3b2807f",
              "versionType": "git"
            },
            {
              "lessThan": "184c1a80421a5b5ddcd262e47980ce2e67fee211",
              "status": "affected",
              "version": "c84760659dcf237902d4cc997cd5f55cb3b2807f",
              "versionType": "git"
            },
            {
              "lessThan": "9f92e749fc08b7ff3d9da190c4d1b2273745b282",
              "status": "affected",
              "version": "c84760659dcf237902d4cc997cd5f55cb3b2807f",
              "versionType": "git"
            },
            {
              "lessThan": "c35da2bac6f7cb9a9be73f188b4fcc324615c327",
              "status": "affected",
              "version": "c84760659dcf237902d4cc997cd5f55cb3b2807f",
              "versionType": "git"
            },
            {
              "lessThan": "b7eea80be25f3334f131d52982b3131aba77b97d",
              "status": "affected",
              "version": "c84760659dcf237902d4cc997cd5f55cb3b2807f",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/xfs/libxfs/xfs_attr_leaf.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.5"
            },
            {
              "lessThan": "5.5",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.267",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.218",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.185",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.154",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.106",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.47",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfs: validate attr entry pointer before field access\n\nxfs_attr3_leaf_verify_entry() accesses lentry/rentry fields (namelen,\nvaluelen) before checking if the entry pointer itself is within bounds.\nIf nameidx is crafted to point near the end of the buffer, these field\naccesses can read out-of-bounds before the bounds check at\nname_end \u003e buf_end is performed.\n\nAdd explicit bounds checks for entry pointers before accessing their\nfields. Use offsetof() to check that the start of the flexible array\nmember (nameval/name) is within bounds, which ensures all preceding\nfields are safe to access."
    }
  ],
  "id": "CVE-2026-80805",
  "lastModified": "2026-09-04T16:18:07.510",
  "metrics": {},
  "published": "2026-09-04T16:18:07.510",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/03a12253dd2a036545bdb0110a4e0b8dc70f8e7c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0f82586741e39926542f621bafa424e237a04fa4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/134d82a2b5e3eba3ebf58753a1387b22f26ca1de"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/184c1a80421a5b5ddcd262e47980ce2e67fee211"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/98a42bb9d60d42898c3494de351a1bf508348cde"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9f92e749fc08b7ff3d9da190c4d1b2273745b282"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b7eea80be25f3334f131d52982b3131aba77b97d"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c35da2bac6f7cb9a9be73f188b4fcc324615c327"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e99120b5944a16d0bc27e52b33de78bcdaaabf5c"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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