9.8

CVE-2026-89636: linux

CVSS: 9.8v3.1CriticalReceived
AliasesUBUNTU-CVE-2026-89636DEBIAN-CVE-2026-89636
Published 11-09-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-89636 is a critical (CVSS 9.8) vulnerability in linux. EPSS estimates a 0.66% chance of exploitation in the next 30 days, higher than 51% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.66%
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 11 · Related 10
MGASA-2026-0506OPENSUSE-SU-2026:11880-1SUSE-SU-2026:24181-1SUSE-SU-2026:24182-1SUSE-SU-2026:4640-1SUSE-SU-2026:4660-1

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: smb: client: clear ce->tgthint in free_tgts() When free_tgts() frees all structures in ce->tlist, ce->tgthint is left pointing to one of the freed cache_dfs_tgt structures. If ce->tgthint is not reset before it is used later, it results in a use-after-free. Set ce->tgthint to NULL in free_tgts() after the elements are freed to reflect that no elements remain.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.66%

Chance of exploitation in the next 30 days

Percentile

51%

Versus all other CVEs

30-day change

+0.01 pp

From 0.65% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.66%

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

Ubuntu165 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
  • linuxAll versions (No fix recorded) | < 6.1.190-1 | < 6.12.111-1 | < 7.2.6-1
  • linux-6.12< 6.12.111-1~deb12u1
Linux1 product
  • linux≥ 54be1f6c1c37498bba557049df646cc239fa37e3, < 14f60e959b5ac813715ff72e127beb3584ddabf6 | ≥ 54be1f6c1c37498bba557049df646cc239fa37e3, < 3ff9462bb7a06d8d32a1dc02d39580b078ec9e55 | ≥ 54be1f6c1c37498bba557049df646cc239fa37e3, < 7507bd1885643d0461a6017767492450af1ce2a3 | ≥ 54be1f6c1c37498bba557049df646cc239fa37e3, < 9ab46a13798a61d9d020b01d4e57efdabe6624fa | ≥ 54be1f6c1c37498bba557049df646cc239fa37e3, < 5baab40404a9393bcc0b7b8f1950bf2c307e0984 | ≥ 54be1f6c1c37498bba557049df646cc239fa37e3, < b1b741cf8e7ce1b91d937e23decd3d3358748700 | 5.0

3 vendors · 168 products

References

11 links
Show all 11 references