CVE-2026-89636

CVE-2026-89636

Critical · published September 12, 2026

CVSS v3.1
9.8
EPSS
1%
Percentile
51.1
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00663 · 51.1th percentile
Published
2026-09-12T00:19Z
References (6)
https://git.kernel.org/stable/c/14f60e959b5ac813715ff72e127beb3584ddabf6 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3ff9462bb7a06d8d32a1dc02d39580b078ec9e55 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5baab40404a9393bcc0b7b8f1950bf2c307e0984 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7507bd1885643d0461a6017767492450af1ce2a3 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9ab46a13798a61d9d020b01d4e57efdabe6624fa · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b1b741cf8e7ce1b91d937e23decd3d3358748700 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67
EPSS history
Timeline
  • 13 SEP 03:23Z
    EPSS moved — → 0%
    epss
  • 11 SEP 19:45Z
    smb: client: clear ce->tgthint in free_tgts()
    cvelistv5