CVE-2026-80962

Status: UPDATED  |  Advisory ID: CVE-2026-80962

Key Details

Affected Products, Subsystems & Sectors

What to Know

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

dm-pcache: validate geometry fields from on-disk cache_info

cache_segs_init() iterates cache_info->n_segs times indexing

cache->segments[], which is sized to the cache device geometry, and

get_seg_id() takes each segment id from the on-media cache_info and the

per-segment next_seg link. Both come from cache device metadata that is

only CRC-protected with a fixed public seed, so whoever supplies the

cache device on a table load (CAP_SYS_ADMIN) controls them: an oversized

n_segs or an out-of-range id drives an out-of-bounds access of

cache->segments[] and a wild CACHE_DEV_SEGMENT() pointer into the device

mapping -- an out-of-bounds read and write from on-disk data.

Reject an n_segs that exceeds the device segment count and a segment id

that is out of range before either is used. Valid metadata is unaffected. (NVD)

What to Do

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

References