CVE-2026-80533 (GCVE-0-2026-80533)

Vulnerability from cvelistv5 – Published: 2026-08-26 14:37 – Updated: 2026-08-26 14:37
VLAI
Title
xfs: don't walk off the end of a null sc->sa.agi_bp in AGI repair
Summary
In the Linux kernel, the following vulnerability has been resolved: xfs: don't walk off the end of a null sc->sa.agi_bp in AGI repair LOLLM noticed a longstanding bug where xrep_iunlink_walk_ondisk_bucket tries to walk ragi->sc->sa.agi_bp to rebuild the unlinked inode lists. Unfortunately, it's possible for agi_bp to be null if the buffer verifier fails, so we have to use ragi->agi_bp (which skips verifier checks) instead.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: ab97f4b1c030750f2475bf4da8a9554d02206640 , < 43b4ecbc948a2e441804c9d7b772deb6b2e44e3d (git)
Affected: ab97f4b1c030750f2475bf4da8a9554d02206640 , < c36d7f68f1c2e7e528ad11044a0bd6a3016a6a03 (git)
Affected: ab97f4b1c030750f2475bf4da8a9554d02206640 , < a6cfd0e4bb1e5f4dd2a67fa99eab36bda47cf081 (git)
Affected: ab97f4b1c030750f2475bf4da8a9554d02206640 , < 1e96a00e0d3a00be6e4f368b2f18e2d345f813ce (git)
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Linux Linux Affected: 6.10
Unaffected: 0 , < 6.10 (semver)
Unaffected: 6.12.105 , ≤ 6.12.* (semver)
Unaffected: 6.18.46 , ≤ 6.18.* (semver)
Unaffected: 7.1.10 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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{
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          "product": "Linux",
          "programFiles": [
            "fs/xfs/scrub/agheader_repair.c"
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                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfs: don\u0027t walk off the end of a null sc-\u003esa.agi_bp in AGI repair\n\nLOLLM noticed a longstanding bug where xrep_iunlink_walk_ondisk_bucket\ntries to walk ragi-\u003esc-\u003esa.agi_bp to rebuild the unlinked inode lists.\nUnfortunately, it\u0027s possible for agi_bp to be null if the buffer\nverifier fails, so we have to use ragi-\u003eagi_bp (which skips verifier\nchecks) instead."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-26T14:37:09.785Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/43b4ecbc948a2e441804c9d7b772deb6b2e44e3d"
        },
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          "url": "https://git.kernel.org/stable/c/1e96a00e0d3a00be6e4f368b2f18e2d345f813ce"
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      ],
      "title": "xfs: don\u0027t walk off the end of a null sc-\u003esa.agi_bp in AGI repair",
      "x_generator": {
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80533",
    "datePublished": "2026-08-26T14:37:09.785Z",
    "dateReserved": "2026-08-26T14:34:25.764Z",
    "dateUpdated": "2026-08-26T14:37:09.785Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
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      "date": "2026-09-01",
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      "percentile": "0.06283"
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    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-08-27T17:12:40+00:00",
      "cve": "CVE-2026-80533",
      "id": "CVE-2026-80533",
      "initial_release_date": "2026-08-26T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: xfs: don\u0027t walk off the end of a null sc-\u003esa.agi_bp in AGI repair",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80533.json",
      "version": "3"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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.
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  • 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.


Detection rules are retrieved from Rulezet.