Medium severity5.5NVD Advisory· Published Jul 4, 2025· Updated Jun 17, 2026
CVE-2025-38191
CVE-2025-38191
Description
In the Linux kernel, the following vulnerability has been resolved:
ksmbd: fix null pointer dereference in destroy_previous_session
If client set ->PreviousSessionId on kerberos session setup stage, NULL pointer dereference error will happen. Since sess->user is not set yet, It can pass the user argument as NULL to destroy_previous_session. sess->user will be set in ksmbd_krb5_authenticate(). So this patch move calling destroy_previous_session() after ksmbd_krb5_authenticate().
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Affected products
4Patches
Vulnerability mechanics
References
7- git.kernel.org/stable/c/076f1adefb9837977af7ed233883842ddc446644nvdPatch
- git.kernel.org/stable/c/0902625a24eea7fdc187faa5d97df244d159dd6envdPatch
- git.kernel.org/stable/c/1193486dffb7432a09f57f5d09049b4d4123538bnvdPatch
- git.kernel.org/stable/c/281afc52e2961cd5dd8326ebc9c5bc40904c0468nvdPatch
- git.kernel.org/stable/c/7ac5b66acafcc9292fb935d7e03790f2b8b2dc0envdPatch
- lists.debian.org/debian-lts-announce/2025/10/msg00008.htmlnvdThird Party Advisory
- www.zerodayinitiative.com/advisories/ZDI-25-610/nvdThird Party Advisory
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