platform/x86: ISST: Validate level in perf mask ioctls
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.
CVE-2026-89443
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-89443
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "ea009e4769fa3bd05d4c111c3b6865eb3a9be829",
"lessThan": "beb22ebf76c0415f22d2d0c3f1ff0627e7ae4a68",
"versionType": "git"
},
{
"status": "affected",
"version": "ea009e4769fa3bd05d4c111c3b6865eb3a9be829",
"lessThan": "1a8bab5ceee1a42a78de12d3d69f67516a20588e",
"versionType": "git"
},
{
"status": "affected",
"version": "ea009e4769fa3bd05d4c111c3b6865eb3a9be829",
"lessThan": "1889a9156553f0692acd57caf15e877baace1a01",
"versionType": "git"
},
{
"status": "affected",
"version": "ea009e4769fa3bd05d4c111c3b6865eb3a9be829",
"lessThan": "d19385624bdfb577db9c94bb8879992fd5e17bcd",
"versionType": "git"
},
{
"status": "affected",
"version": "ea009e4769fa3bd05d4c111c3b6865eb3a9be829",
"lessThan": "80e0d353c86a9a168ad6d213f494796294381538",
"versionType": "git"
}
],
"programFiles": [
"drivers/platform/x86/intel/speed_select_if/isst_tpmi_core.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.4"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.4",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.109",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.50",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.4",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/platform/x86/intel/speed_select_if/isst_tpmi_core.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-89443
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #34977 · Revision 1
- Added to Heist Feed
- Publisher date