Medium [CVE-2026-80958] Linux kernel: dm-pcache out-of-bounds read vulnerability
This medium-severity Red Hat Linux advisory covers CVE-2026-80958.
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Summary
A flaw was found in the dm-pcache component of the Linux kernel. The tail-kset read operations, used by cache_replay(), the writeback worker, and the garbage collection (GC) worker, incorrectly calculate the length of the data region.
This error causes the system to read beyond the intended segment data into an adjacent control area, which could lead to information disclosure or system instability. Red Hat severity: Moderate — CVSS 5.1 (CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:H).
Weakness: CWE-125.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · medium-confidence parse· fetched 34 minutes ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · medium-confidence parse· fetched 34 minutes ago·verify at source
Mitigation
The source record does not include mitigation steps. That is not a statement that no fix exists — read the vendor advisory below for the authoritative guidance.
Official advisory · medium-confidence parse· fetched 34 minutes ago·verify at source
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