CVE-2026-89443
CVE CVE-2026-89443EUVD EUVD-2026-76349Published 2026-09-11T19:43:11.000ZLast changed 2026-09-14T11:59:53.000ZCVSS 7.1
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: platform/x86: ISST: Validate level in perf mask ioctls isst_if_get_perf_level_mask() and isst_if_get_base_freq_mask() use the user-provided level as an index into perf_levels[] via _read_pp_level_info() and _read_bf_level_info(), but neither helper validates it first. The adjacent level-info helpers reject levels above max_level before reading the same per-level register block. Add the same bounds checks to the mask helpers, and reject disabled SST-PP levels in isst_if_get_perf_level_mask() to match isst_if_get_perf_level_info(). This prevents out-of-bounds reads from the per-level offset table on invalid ioctl input.
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 6.4; patch: 7.3-rc1; ea009e4769fa3bd05d4c111c3b6865eb3a9be829 <1a8bab5ceee1a42a78de12d3d69f67516a20588e; patch: 6.18.50; ea009e4769fa3bd05d4c111c3b6865eb3a9be829 <1889a9156553f0692acd57caf15e877baace1a01; patch: 7.2.4; ea009e4769fa3bd05d4c111c3b6865eb3a9be829 <d19385624bdfb577db9c94bb8879992fd5e17bcd; patch: 0; patch: 6.12.109; ea009e4769fa3bd05d4c111c3b6865eb3a9be829 <80e0d353c86a9a168ad6d213f494796294381538; patch: 6.6.157; ea009e4769fa3bd05d4c111c3b6865eb3a9be829 <beb22ebf76c0415f22d2d0c3f1ff0627e7ae4a68
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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