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Vulnerability record · CVE-2025-37924 · published 20 May 2025

CVE-2025-37924: Linux kernel use after free vulnerability

Linux · Linux Kernel

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.

7.8 CVSS 3.1 High EPSS 21% · top 2.5% CWE-416 · Use after free
7.8CVSS 3.1 base score
21%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
6References
17 Jun 2026Last modified by NVD

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.

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/stable/c/28c756738af44a404a91b77830d017bb0c525890 Patch
https://git.kernel.org/stable/c/b447463562238428503cfba1c913261047772f90 Patch
https://git.kernel.org/stable/c/e18c616718018dfc440e4a2d2b94e28fe91b1861 Patch
https://git.kernel.org/stable/c/e34a33d5d7e87399af0a138bb32f6a3e95dd83d2 Patch
https://git.kernel.org/stable/c/e86e9134e1d1c90a960dd57f59ce574d27b9a124 Patch
https://lists.debian.org/debian-lts-announce/2025/08/msg00010.html Mailing ListThird Party Advisory

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2025-37924), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.