CVE-2026-80805 (GCVE-0-2026-80805)

Vulnerability from cvelistv5 – Published: 2026-09-04 15:13 – Updated: 2026-11-06 17:05
VLAI
Title
xfs: validate attr entry pointer before field access
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.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-06 17:03 UTC
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6642 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: c84760659dcf237902d4cc997cd5f55cb3b2807f , < 0f82586741e39926542f621bafa424e237a04fa4 (git)
Affected: c84760659dcf237902d4cc997cd5f55cb3b2807f , < 134d82a2b5e3eba3ebf58753a1387b22f26ca1de (git)
Affected: c84760659dcf237902d4cc997cd5f55cb3b2807f , < 03a12253dd2a036545bdb0110a4e0b8dc70f8e7c (git)
Affected: c84760659dcf237902d4cc997cd5f55cb3b2807f , < e99120b5944a16d0bc27e52b33de78bcdaaabf5c (git)
Affected: c84760659dcf237902d4cc997cd5f55cb3b2807f , < 98a42bb9d60d42898c3494de351a1bf508348cde (git)
Affected: c84760659dcf237902d4cc997cd5f55cb3b2807f , < 184c1a80421a5b5ddcd262e47980ce2e67fee211 (git)
Affected: c84760659dcf237902d4cc997cd5f55cb3b2807f , < 9f92e749fc08b7ff3d9da190c4d1b2273745b282 (git)
Affected: c84760659dcf237902d4cc997cd5f55cb3b2807f , < c35da2bac6f7cb9a9be73f188b4fcc324615c327 (git)
Affected: c84760659dcf237902d4cc997cd5f55cb3b2807f , < b7eea80be25f3334f131d52982b3131aba77b97d (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.5
Unaffected: 0 , < 5.5 (semver)
Unaffected: 5.10.267 , ≤ 5.10.* (semver)
Unaffected: 5.15.218 , ≤ 5.15.* (semver)
Unaffected: 6.1.185 , ≤ 6.1.* (semver)
Unaffected: 6.6.154 , ≤ 6.6.* (semver)
Unaffected: 6.12.106 , ≤ 6.12.* (semver)
Unaffected: 6.18.47 , ≤ 6.18.* (semver)
Unaffected: 7.1.11 , ≤ 7.1.* (semver)
Unaffected: 7.2.1 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-11-07T04:35:25+00:00",
      "cve": "CVE-2026-80805",
      "id": "CVE-2026-80805",
      "initial_release_date": "2026-09-04T00:00:00+00:00",
      "product_status:known_affected": "161",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: xfs: validate attr entry pointer before field access",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80805.json",
      "version": "3"
    },
    "vulnrichment": {
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        "adp": [
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            "metrics": [
              {
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                    "options": [
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                      },
                      {
                        "Automatable": "no"
                      },
                      {
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                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2026-11-06T17:03:35.372702Z",
                    "version": "2.0.3"
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              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
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              "product": "Linux",
              "programFiles": [
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              "vendor": "Linux",
              "versions": [
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                  "status": "affected",
                  "version": "5.5"
                },
                {
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                  "status": "unaffected",
                  "version": "0",
                  "versionType": "semver"
                },
                {
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                },
                {
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                  "status": "unaffected",
                  "version": "5.15.218",
                  "versionType": "semver"
                },
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                },
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                },
                {
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                  "status": "unaffected",
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                },
                {
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                  "status": "unaffected",
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                },
                {
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                  "status": "unaffected",
                  "version": "7.3",
                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "cpeApplicability": [
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                      "vulnerable": true
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              "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."
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            {
              "url": "https://git.kernel.org/stable/c/b7eea80be25f3334f131d52982b3131aba77b97d"
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        "assignerShortName": "Linux",
        "cveId": "CVE-2026-80805",
        "datePublished": "2026-09-04T15:13:19.239Z",
        "dateReserved": "2026-08-26T14:34:25.794Z",
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        "state": "PUBLISHED"
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    }
  }
}



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