CVE-2026-89438platform/x86: ISST: Validate logical CPU id and clos id
- —Not scoredno CVSS score yet
- 0.21%Exploitation in 30 daysEPSS · top 89% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By Linux
Published
- 38 days later
· 38 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.21% · top 89% of all CVEs (12 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected 12a7d2cb811dd8a884dea088a2701fcb8d00136e – < 0d601126c7afda9bb94dfecc8b2c0a16f20d76cb
- affected 12a7d2cb811dd8a884dea088a2701fcb8d00136e – < c9ee2770eb95ba316a56d776b2b66666b70c194b
- affected 12a7d2cb811dd8a884dea088a2701fcb8d00136e – < 5b032e1dda486ca41d10536bd195bd8a559af1e2
- affected 12a7d2cb811dd8a884dea088a2701fcb8d00136e – < 82d4afadb02fb4d7d7bb9230900904c10e49ec87
- affected 12a7d2cb811dd8a884dea088a2701fcb8d00136e – < 124e2dbabe460c2a6e7440f4ad8af560131295c9
- affected 6.4
- unaffected < 6.4
- unaffected 6.6.157 – ≤ 6.6.*
- unaffected 6.12.109 – ≤ 6.12.*
- unaffected 6.18.50 – ≤ 6.18.*
- unaffected 7.2.4 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References5
- https://git.kernel.org/stable/c/0d601126c7afda9bb94dfecc8b2c0a16f20d76cb (opens in a new tab)
- https://git.kernel.org/stable/c/c9ee2770eb95ba316a56d776b2b66666b70c194b (opens in a new tab)
- https://git.kernel.org/stable/c/5b032e1dda486ca41d10536bd195bd8a559af1e2 (opens in a new tab)
- https://git.kernel.org/stable/c/82d4afadb02fb4d7d7bb9230900904c10e49ec87 (opens in a new tab)
- https://git.kernel.org/stable/c/124e2dbabe460c2a6e7440f4ad8af560131295c9 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-76344 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-89438)Record last updated .