CVE-2026-80955

Last refreshed2026-10-19

Status: UPDATED | Advisory ID: CVE-2026-80955

Key Details

CVE	CVE-2026-80955
CVSS Score / Version	7.8 (High) / CVSS v3.1
Updated	2026-10-19
CVSS Vector	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`
CVSS Prose	attack vector is local; attack complexity is low; privileges required is low; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products	Linux Kernel

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Subsystems	OT Supporting Infrastructure
Sectors	All Sectors

In the Linux kernel, the following vulnerability has been resolved:

dm-pcache: fix use-after-free and invalid seg operations in kset_replay()

In kset_replay, when key->seg_gen is stale (key->seg_gen <

key->cache_pos.cache_seg->gen), cache_key_put(key) is called but then

key->cache_pos.cache_seg is accessed as the argument to cache_seg_get().

This is a use-after-free on the freed key memory. Although mempool

recycled memory is not immediately reclaimed or overwritten in practice,

this is still a potential UAF bug.

Additionally, for expired invalid keys, setting the cache->seg_map bit

and calling cache_seg_get() is unreasonable since the corresponding

segment data is no longer valid.

Fix both issues by moving cache_seg_get() and __set_bit() after the

gen check, so they only execute for valid keys, and using continue to

skip invalid keys. (NVD)

Monitor Linux's web page for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-80955
CVE	https://www.cve.org/CVERecord?id=CVE-2026-80955

Source

Reference

NVD

CVE