CVE-2026-89438: linux

CVSS: UnknownReceived
AliasesUBUNTU-CVE-2026-89438DEBIAN-CVE-2026-89438
Published 11-09-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-89438 is a vulnerability in linux with no CVSS score yet. EPSS estimates a 0.21% chance of exploitation in the next 30 days, higher than 10% of scored vulnerabilities.

Overall risk
0/100
0100
Minimal · default modelHow is this calculated?
CVSS score
Not scored
010
No CVSS score recorded
EPSS score
0.21%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
OPENSUSE-SU-2026:11805-1

Timeline

  1. 11-09-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

Risk metrics not yet published.

EPSS trend

Probability

0.21%

Chance of exploitation in the next 30 days

Percentile

10%

Versus all other CVEs

30-day change

+0.01 pp

From 0.20% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.21%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu142 products
  • linuxAll versions (No fix recorded)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian2 products
  • linux< 6.12.111-1 | < 7.2.6-1
  • linux-6.12< 6.12.111-1~deb12u1
Linux1 product
  • linux≥ 12a7d2cb811dd8a884dea088a2701fcb8d00136e, < 0d601126c7afda9bb94dfecc8b2c0a16f20d76cb | ≥ 12a7d2cb811dd8a884dea088a2701fcb8d00136e, < c9ee2770eb95ba316a56d776b2b66666b70c194b | ≥ 12a7d2cb811dd8a884dea088a2701fcb8d00136e, < 5b032e1dda486ca41d10536bd195bd8a559af1e2 | ≥ 12a7d2cb811dd8a884dea088a2701fcb8d00136e, < 82d4afadb02fb4d7d7bb9230900904c10e49ec87 | ≥ 12a7d2cb811dd8a884dea088a2701fcb8d00136e, < 124e2dbabe460c2a6e7440f4ad8af560131295c9 | 6.4

3 vendors · 145 products

References

9 links