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Back to active CVEs
High · CVSS 7.8CVE-2026-80959

dm-pcache: bound the persisted tail-position offsetCVE-2026-80959

Answer in brief

CVE-2026-80959 records a High severity (CVSS 7.8) vulnerability in dm-pcache: bound the persisted tail-position offset. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 11, 2026Updated Oct 19, 2026Source checked Oct 27, 2026First seen by HOL Sep 11, 2026Material review Oct 19, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 7.8
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Linux/Linuxgeneric>=1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 <ffd9a214a94f9928e54856f42b1cc3e33fb10e36 || >=1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 <8bf7a06ca3c1611809725f58cfd573f2ffbda75f || >=1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 <d1898576090a10d2ac2715218a652e78fb65a6b0ffd9a214a94f9928e54856f42b1cc3e33fb10e36, 8bf7a06ca3c1611809725f58cfd573f2ffbda75f, d1898576090a10d2ac2715218a652e78fb65a6b0
Linux/Linuxgeneric6.18Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
  2. 2Review the reported fix. Update Linux/Linux to ffd9a214a94f9928e54856f42b1cc3e33fb10e36 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Sep 11, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 19, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Sep 11, 2026

Sources and claim methodology

  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
Upstream source description

In the Linux kernel, the following vulnerability has been resolved: dm-pcache: bound the persisted tail-position offset cache_pos_decode() takes the persisted key_tail and dirty_tail seg_off from the cache device and addresses within the segment with it. A seg_off at or past the segment data_size, controllable by whoever supplies the device (CAP_SYS_ADMIN), reads past the segment data. Reject a decoded seg_off that is not below the segment data_size.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
Not reported
Source
CVE List V5
Source checked
Oct 27, 2026
References
3 linked sources
Open source record