CVE-2026-80805

Full vulnerability record from the local CVENow database.

Description

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.

Severity

Not scored

CVSS score

Not available

Vulnerability status

Received

Source identifier

416baaa9-dc9f-4396-8d5f-8c081fb06d67

Published

2026-09-04 16:18:07.510000

Last modified

2026-10-19 09:17:15.113000

View original CVE JSON

{
  "id": "CVE-2026-80805",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-09-04T16:18:07.510",
  "lastModified": "2026-10-19T09:17:15.113",
  "vulnStatus": "Received",
  "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 > 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."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "fs/xfs/libxfs/xfs_attr_leaf.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "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"
            },
            {
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              "lessThan": "98a42bb9d60d42898c3494de351a1bf508348cde",
              "versionType": "git",
              "status": "affected"
            },
            {
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              "lessThan": "184c1a80421a5b5ddcd262e47980ce2e67fee211",
              "versionType": "git",
              "status": "affected"
            },
            {
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              "lessThan": "9f92e749fc08b7ff3d9da190c4d1b2273745b282",
              "versionType": "git",
              "status": "affected"
            },
            {
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              "lessThan": "c35da2bac6f7cb9a9be73f188b4fcc324615c327",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "c84760659dcf237902d4cc997cd5f55cb3b2807f",
              "lessThan": "b7eea80be25f3334f131d52982b3131aba77b97d",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "fs/xfs/libxfs/xfs_attr_leaf.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "5.5",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "5.5",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "5.10.267",
              "lessThanOrEqual": "5.10.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "5.15.218",
              "lessThanOrEqual": "5.15.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.1.185",
              "lessThanOrEqual": "6.1.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.6.154",
              "lessThanOrEqual": "6.6.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.12.106",
              "lessThanOrEqual": "6.12.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.18.47",
              "lessThanOrEqual": "6.18.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.1.11",
              "lessThanOrEqual": "7.1.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.2.1",
              "lessThanOrEqual": "7.2.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.3",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {},
  "references": [
    {
      "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",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}