CVE-2026-80955
CVE CVE-2026-80955EUVD EUVD-2026-76278Published 2026-09-11T19:42:23.000ZLast changed 2026-09-13T06:28:29.000ZCVSS 7.8
What the advisory describes
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seg_map bit and calling cache_seg_get() is unreasonable since the corresponding segment data is no longer valid.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.
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 <c2e894eac398b258f12fdec73ed6ba081047f7b3; 6.18; patch: 0; 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 <1894fc7a3bab90143dcd26ef8ee27040ef4a7501; patch: 7.3-rc1; patch: 6.18.50; 1d57628ff95b32d5cfa8d8f50e07690c161e9cf0 <f39a3e9cc5946473e16d6f5071b2ee0216c56d06; patch: 7.2.4
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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