---
cve: "CVE-2026-80958"
severity: "HIGH"
cvss: 7.1
epss: "12%"
vendor: "Linux"
kev: false
exploited: false
published: "2026-09-11 20:19:01"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-17T17:03:08+02:00"
---

# CVE-2026-80958

> 7.1 HIGH

## Beschreibung

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.

## CVSS-Vektor

```
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Lokal | good |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Keine | good |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- Kernel ≥ 6.18.50
- Kernel ≥ 7.2.4

## Referenzen

- <https://git.kernel.org/stable/c/2cd9776fe3f2d88ec22c36d3c8ba09fbf9d5500c>
- <https://git.kernel.org/stable/c/1ab55354368d071ebaee4d8c82313955eab65a04>
- <https://git.kernel.org/stable/c/becf07e2b0053027495ecd671b1f82fb2e615f68>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-80958) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_