CVE-2026-80532 (GCVE-0-2026-80532)

Vulnerability from cvelistv5 – Published: 2026-08-26 14:37 – Updated: 2026-08-26 14:37
VLAI
Title
xfs: fix another iunlink infinite loop bug in online fsck
Summary
In the Linux kernel, the following vulnerability has been resolved: xfs: fix another iunlink infinite loop bug in online fsck xrep_iunlink_resolve_bucket is supposed to reconstruct as much of the incore prev and next unlinked list pointers based on what it finds on disk and in memory before we move on to relinking the truly lost inodes back into the unlinked list. However, it's still vulnerable to infinite loops that come in via the next_unlinked pointers. Fix this problem by remembering which inodes we've already seen and checking new agino pointers against that. If a bit is already set, either this is a loop or the inode has nonzero link count. We'll deal with the second case in a subsequent patch.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: ab97f4b1c030750f2475bf4da8a9554d02206640 , < 24aec8c88539a382355761a9b924046885b6be40 (git)
Affected: ab97f4b1c030750f2475bf4da8a9554d02206640 , < b6baf0db357fb84f3f3cfd33383a00de71a5a1c3 (git)
Affected: ab97f4b1c030750f2475bf4da8a9554d02206640 , < 23690064f235a88a00c04f2e49f36bfb54ae560d (git)
Affected: ab97f4b1c030750f2475bf4da8a9554d02206640 , < 6d67c6b99f1fc07c64b97fcbc974c6f1ada7f622 (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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            "fs/xfs/scrub/agheader_repair.c",
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              "negate": false,
              "operator": "OR"
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfs: fix another iunlink infinite loop bug in online fsck\n\nxrep_iunlink_resolve_bucket is supposed to reconstruct as much of the\nincore prev and next unlinked list pointers based on what it finds on\ndisk and in memory before we move on to relinking the truly lost inodes\nback into the unlinked list.  However, it\u0027s still vulnerable to infinite\nloops that come in via the next_unlinked pointers.\n\nFix this problem by remembering which inodes we\u0027ve already seen and\nchecking new agino pointers against that.  If a bit is already set,\neither this is a loop or the inode has nonzero link count.  We\u0027ll deal\nwith the second case in a subsequent patch."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-26T14:37:09.194Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/24aec8c88539a382355761a9b924046885b6be40"
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        },
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          "url": "https://git.kernel.org/stable/c/6d67c6b99f1fc07c64b97fcbc974c6f1ada7f622"
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      "title": "xfs: fix another iunlink infinite loop bug in online fsck",
      "x_generator": {
        "engine": "bippy-1.2.0"
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80532",
    "datePublished": "2026-08-26T14:37:09.194Z",
    "dateReserved": "2026-08-26T14:34:25.764Z",
    "dateUpdated": "2026-08-26T14:37:09.194Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
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      "percentile": "0.06282"
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    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-08-27T17:12:35+00:00",
      "cve": "CVE-2026-80532",
      "id": "CVE-2026-80532",
      "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: fix another iunlink infinite loop bug in online fsck",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80532.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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  • 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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  • 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.