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CVE-2026-80957 (GCVE-0-2026-80957)

Vulnerability from cvelistv5 – Published: 2026-09-11 19:42 – Updated: 2026-09-11 19:42
VLAI
Title
dm-pcache: detect a cycle in the last-kset chain during replay
Summary
In the Linux kernel, the following vulnerability has been resolved: dm-pcache: detect a cycle in the last-kset chain during replay cache_replay() follows the on-media last-kset chain by next_cache_seg_id with no cond_resched(). A forged chain that points back into a segment it has already visited makes the replay loop follow it forever. Cap the last-kset hops at cache->n_segs; a valid chain visits each segment at most once.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 , < 663ee2f3824a505b983162de44134e789f8230da (git)
Affected: 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 , < 5311dfc5cd70edccd110257e3f30b2c1dcd3768d (git)
Affected: 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 , < 16c3b3a326e70f246a605b3dc27b7f83ba4743e3 (git)
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Linux Linux Affected: 6.18
Unaffected: 0 , < 6.18 (semver)
Unaffected: 6.18.50 , ≤ 6.18.* (semver)
Unaffected: 7.2.4 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
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{
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          "product": "Linux",
          "programFiles": [
            "drivers/md/dm-pcache/cache_key.c"
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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndm-pcache: detect a cycle in the last-kset chain during replay\n\ncache_replay() follows the on-media last-kset chain by next_cache_seg_id\nwith no cond_resched(). A forged chain that points back into a segment it\nhas already visited makes the replay loop follow it forever.\n\nCap the last-kset hops at cache-\u003en_segs; a valid chain visits each segment\nat most once."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-11T19:42:25.194Z",
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        "shortName": "Linux"
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    "cveId": "CVE-2026-80957",
    "datePublished": "2026-09-11T19:42:25.194Z",
    "dateReserved": "2026-08-26T14:34:25.804Z",
    "dateUpdated": "2026-09-11T19:42:25.194Z",
    "state": "PUBLISHED"
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            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndm-pcache: detect a cycle in the last-kset chain during replay\n\ncache_replay() follows the on-media last-kset chain by next_cache_seg_id\nwith no cond_resched(). A forged chain that points back into a segment it\nhas already visited makes the replay loop follow it forever.\n\nCap the last-kset hops at cache-\u003en_segs; a valid chain visits each segment\nat most once."
          }
        ],
        "id": "CVE-2026-80957",
        "lastModified": "2026-09-11T20:19:01.520",
        "metrics": {},
        "published": "2026-09-11T20:19:01.520",
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      "title": "kernel: dm-pcache: detect a cycle in the last-kset chain during replay",
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      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-80957.json",
      "version": "2"
    }
  }
}



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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.


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