CVE-2026-80956
CVE CVE-2026-80956EUVD EUVD-2026-76279Published 2026-09-11T19:42:24.000Z
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: dm-pcache: only hand out initialized cache segments get_cache_segment() scans the segment map up to cache->n_segs, the physical device segment count, but cache_segs_init() only initializes the first cache_info->n_segs segments. A crafted image with cache_info->n_segs smaller than the device count leaves the remaining pcache_cache_segment structs zeroed (segment.data == NULL), and the allocator can hand one to cache_kset_close(), which writes through the returned segment's data pointer with no NULL check. Bound the allocator's search to cache_info->n_segs so only initialized segments are ever returned. A conforming cache sets n_segs equal to the device segment count, so this rejects nothing legitimate.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 <2df0fc042e299bae3c0f60ea5cd2af9285658e9f; 6.18; 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 <83e3116283ed2c6a6a1fa662862a4b4d7d2701a2; patch: 6.18.50; 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 <692037ae1a7cfacc2f0c22c6e034c1dfee0e553f; patch: 7.2.4; patch: 0; patch: 7.3-rc1
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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