CVE-2026-89443

Last refreshed2026-10-19

Status: UPDATED | Advisory ID: CVE-2026-89443

Key Details

CVE	CVE-2026-89443
CVSS Score / Version	7.1 (High) / CVSS v3.1
Updated	2026-10-19
CVSS Vector	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H`
CVSS Prose	attack vector is local; attack complexity is low; privileges required is low; user interaction is none; scope is unchanged; confidentiality impact is high; integrity impact is none; availability impact is high.
Affected products	Linux Kernel

Vendor	Product	Affected Versions	Patch Status
Linux	Linux Kernel

Vendor

Product

Affected Versions

Patch Status

Linux

Linux Kernel

Subsystems	OT Supporting Infrastructure
Sectors	All Sectors

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. (NVD)

Monitor Linux's web page for any future patch releases.

Source	Reference
NVD	https://nvd.nist.gov/vuln/detail/CVE-2026-89443
CVE	https://www.cve.org/CVERecord?id=CVE-2026-89443

Source

Reference

NVD

CVE