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CVE

CVE-2026-89636

smb: client: clear ce->tgthint in free_tgts()
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CVE

CVE-2026-89636

smb: client: clear ce->tgthint in free_tgts()

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 cachedfstgt 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.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
9.8
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
C
H
U
-

Related Resources

No items found.

References

https://git.kernel.org/stable/c/14f60e959b5ac813715ff72e127beb3584ddabf6, https://git.kernel.org/stable/c/3ff9462bb7a06d8d32a1dc02d39580b078ec9e55, https://git.kernel.org/stable/c/5baab40404a9393bcc0b7b8f1950bf2c307e0984, https://git.kernel.org/stable/c/7507bd1885643d0461a6017767492450af1ce2a3, https://git.kernel.org/stable/c/9ab46a13798a61d9d020b01d4e57efdabe6624fa, https://git.kernel.org/stable/c/b1b741cf8e7ce1b91d937e23decd3d3358748700, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89636.json, https://nvd.nist.gov/vuln/detail/CVE-2026-89636, https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Severity

9.8

CVSS Score
0
10

Basic Information

Base CVSS
9.8
EPSS Probability
0.00663%
EPSS Percentile
0.50144%
Introduced Version
54be1f6c1c37498bba557049df646cc239fa37e3,5.0.0,6.2.0,6.7.0,6.13.0,6.19.0,0
Fix Available
b1b741cf8e7ce1b91d937e23decd3d3358748700,6.1.188,6.6.157,6.12.109,6.18.50,7.2.4,6.12.111-1~deb12u1,6.12.111-1,0:6.12.0-207.111.5.1.el10uek,0:6.12.0-207.111.5.1.el9uek

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