Answer in brief
CVE-2026-80958 records a High severity (CVSS 7.1) vulnerability in dm-pcache: clamp the tail kset read to the segment data region. 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.
CVSS is 7.1. 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.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 <2cd9776fe3f2d88ec22c36d3c8ba09fbf9d5500c || >=1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 <1ab55354368d071ebaee4d8c82313955eab65a04 || >=1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 <becf07e2b0053027495ecd671b1f82fb2e615f68 | 2cd9776fe3f2d88ec22c36d3c8ba09fbf9d5500c, 1ab55354368d071ebaee4d8c82313955eab65a04, becf07e2b0053027495ecd671b1f82fb2e615f68 |
| Linux/Linuxgeneric | 6.18 | Not reported |
Published upstream
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 11, 2026
In the Linux kernel, the following vulnerability has been resolved: dm-pcache: clamp the tail kset read to the segment data region The tail-kset read in cache_replay(), the writeback worker and the GC worker bounds its length by PCACHE_SEG_SIZE - seg_off, the raw segment size rather than the data region. A tail near the segment end reads past the segment data into the following control area. Clamp the read to cache_seg_remain(), the data region.
Quoted source text, attributed separately from HOL analysis.