CVE-2026-89438platform/x86: ISST: Validate logical CPU id and clos id
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: platform/x86: ISST: Validate logical CPU id and clos id Validate max CLOS ID and logical CPU ID for core power feature. Reject any clos level or logical CPU number greater than the supported maximum. These are used to calculate MMIO offset.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Sep 14, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 12a7d2cb811dd8a884dea088a2701fcb8d00136e builds before 0d601126c7afda9bb94dfecc8b2c0a16f20d76cb; from 12a7d2cb811dd8a884dea088a2701fcb8d00136e before c9ee2770eb95ba316a56d776b2b66666b70c194b; 12a7d2cb811dd8a884dea088a2701fcb8d00136e builds before 5b032e1dda486ca41d10536bd195bd8a559af1e2; from 12a7d2cb811dd8a884dea088a2701fcb8d00136e before 82d4afadb02fb4d7d7bb9230900904c10e49ec87; from 12a7d2cb811dd8a884dea088a2701fcb8d00136e before 124e2dbabe460c2a6e7440f4ad8af560131295c9 | CNA record |
References
- https://git.kernel.org/stable/c/0d601126c7afda9bb94dfecc8b2c0a16f20d76cb
- https://git.kernel.org/stable/c/c9ee2770eb95ba316a56d776b2b66666b70c194b
- https://git.kernel.org/stable/c/5b032e1dda486ca41d10536bd195bd8a559af1e2
- https://git.kernel.org/stable/c/82d4afadb02fb4d7d7bb9230900904c10e49ec87
- https://git.kernel.org/stable/c/124e2dbabe460c2a6e7440f4ad8af560131295c9
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.