Answer in brief
CVE-2026-89443 records a High severity (CVSS 7.1) vulnerability in platform/x86: ISST: Validate level in perf mask ioctls. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=ea009e4769fa3bd05d4c111c3b6865eb3a9be829 <1a8bab5ceee1a42a78de12d3d69f67516a20588e || >=ea009e4769fa3bd05d4c111c3b6865eb3a9be829 <1889a9156553f0692acd57caf15e877baace1a01 || >=ea009e4769fa3bd05d4c111c3b6865eb3a9be829 <d19385624bdfb577db9c94bb8879992fd5e17bcd || >=ea009e4769fa3bd05d4c111c3b6865eb3a9be829 <80e0d353c86a9a168ad6d213f494796294381538 | 1a8bab5ceee1a42a78de12d3d69f67516a20588e, 1889a9156553f0692acd57caf15e877baace1a01, d19385624bdfb577db9c94bb8879992fd5e17bcd, 80e0d353c86a9a168ad6d213f494796294381538 |
| Linux/Linuxgeneric | 6.4 | Not reported |
| Linux/Linuxgeneric | >=ea009e4769fa3bd05d4c111c3b6865eb3a9be829 <beb22ebf76c0415f22d2d0c3f1ff0627e7ae4a68 || >=ea009e4769fa3bd05d4c111c3b6865eb3a9be829 <1a8bab5ceee1a42a78de12d3d69f67516a20588e || >=ea009e4769fa3bd05d4c111c3b6865eb3a9be829 <1889a9156553f0692acd57caf15e877baace1a01 || >=ea009e4769fa3bd05d4c111c3b6865eb3a9be829 <d19385624bdfb577db9c94bb8879992fd5e17bcd || >=ea009e4769fa3bd05d4c111c3b6865eb3a9be829 <80e0d353c86a9a168ad6d213f494796294381538 | beb22ebf76c0415f22d2d0c3f1ff0627e7ae4a68, 1a8bab5ceee1a42a78de12d3d69f67516a20588e, 1889a9156553f0692acd57caf15e877baace1a01, d19385624bdfb577db9c94bb8879992fd5e17bcd, 80e0d353c86a9a168ad6d213f494796294381538 |
Published upstream
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 11, 2026
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.
Quoted source text, attributed separately from HOL analysis.