# CVE-2026-80958

## Summary

- **CVE ID:** CVE-2026-80958
- **Severity:** HIGH
- **CVSS Score:** 7.1 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H)
- **CWE:** N/A
- **Published:** Sep 11, 2026
- **Last Modified:** Sep 13, 2026

## Description

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.

## Affected Products

- Linux — Linux (1d57628ff95b32d5cfa8d8f50e07690c161e9cf0)
- Linux — Linux (6.18)
- Linux — Linux (0)
- Linux — Linux (6.18.50)
- Linux — Linux (7.2.4)
- Linux — Linux (7.3-rc1)

## References

- [CNA](https://git.kernel.org/stable/c/2cd9776fe3f2d88ec22c36d3c8ba09fbf9d5500c)
- [CNA](https://git.kernel.org/stable/c/1ab55354368d071ebaee4d8c82313955eab65a04)
- [CNA](https://git.kernel.org/stable/c/becf07e2b0053027495ecd671b1f82fb2e615f68)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.12%
- **EPSS Percentile:** 2.4

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-19._