CVE-2025-37924

ksmbd: fix use-after-free in kerberos authentication

HIGH

7.8

CVSS Score

Published: May 20, 2025 at 03:21 PM UTC

Updated: October 15, 2026 at 10:18 PM UTC

2 products affected across 2 vendorsLinux KernelDebian Linux

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Severity

HIGH7.8

Exploit prediction

EPSS 25%

SSVC

No known exploit

Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix use-after-free in kerberos authentication Setting sess->user = NULL was introduced to fix the dangling pointer created by ksmbd_free_user. However, it is possible another thread could be operating on the session and make use of sess->user after it has been passed to ksmbd_free_user but before sess->user is set to NULL.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Debian Linux · Debiandrupal

95%

11.0

Linux Kernel · Linux

95%

5.15 ≤ v < 6.1.1386.13 ≤ v < 6.14.66.2 ≤ v < 6.6.906.7 ≤ v < 6.12.285.15 6.15 6.15 rc1 6.15 rc2 6.15 rc3 6.15 rc4626e6641f6b467447c81dd7678a69c66f7746cf

Vendor states this is fixed in 28c756738af44a404a91b77830d017bb0c525890 (fixed)

Vendor states this is fixed in b447463562238428503cfba1c913261047772f90 (fixed)

Vendor states this is fixed in e18c616718018dfc440e4a2d2b94e28fe91b1861 (fixed)

Vendor states this is fixed in e34a33d5d7e87399af0a138bb32f6a3e95dd83d2 (fixed)

Vendor states this is fixed in e86e9134e1d1c90a960dd57f59ce574d27b9a124 (fixed)

Vendor states this is fixed in 5.15 (unaffected)

Vendor states this is fixed in 6.1.138 (unaffected)

Vendor states this is fixed in 6.12.28 (unaffected)

Vendor states this is fixed in 6.14.6 (unaffected)

Vendor states this is fixed in 6.15 (unaffected)

Vendor states this is fixed in 6.6.90 (unaffected)