Vulnerability-Lookup

GHSA-P2V2-4GMP-9RPH

Vulnerability from github – Published: 2026-09-11 21:31 – Updated: 2026-09-11 21:31

Details

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.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-80957"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-11T20:19:01Z",
    "severity": null
  },
  "details": "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": "GHSA-p2v2-4gmp-9rph",
  "modified": "2026-09-11T21:31:21Z",
  "published": "2026-09-11T21:31:21Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80957"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/16c3b3a326e70f246a605b3dc27b7f83ba4743e3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5311dfc5cd70edccd110257e3f30b2c1dcd3768d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/663ee2f3824a505b983162de44134e789f8230da"
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  ],
  "schema_version": "1.4.0",
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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

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

Linux mitre root

References

3 references

URL	Tags
https://git.kernel.org/stable/c/663ee2f3824a505b9…
https://git.kernel.org/stable/c/5311dfc5cd70edccd…
https://git.kernel.org/stable/c/16c3b3a326e70f246…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 , < 663ee2f3824a505b983162de44134e789f8230da (git) Affected: 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 , < 5311dfc5cd70edccd110257e3f30b2c1dcd3768d (git) Affected: 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 , < 16c3b3a326e70f246a605b3dc27b7f83ba4743e3 (git)
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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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/md/dm-pcache/cache_key.c"
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              "versionType": "git"
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          "versions": [
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          "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."
        }
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        "dateUpdated": "2026-09-11T19:42:25.194Z",
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Sightings

Author	Source	Type	Date	Other

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.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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