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().
Affected products
linux: linux kernel; debian: debian linux
References7
- git.kernel.org/stable/c/076f1adefb9837977af7ed233883842ddc446644 Patch
- git.kernel.org/stable/c/0902625a24eea7fdc187faa5d97df244d159dd6e Patch
- git.kernel.org/stable/c/1193486dffb7432a09f57f5d09049b4d4123538b Patch
- git.kernel.org/stable/c/281afc52e2961cd5dd8326ebc9c5bc40904c0468 Patch
- git.kernel.org/stable/c/7ac5b66acafcc9292fb935d7e03790f2b8b2dc0e Patch
- www.zerodayinitiative.com/advisories/ZDI-25-610/ Third Party Advisory
- lists.debian.org/debian-lts-announce/2025/10/msg00008.html Third Party Advisory
Metrics
- CVSS 3.1
-
5.5
MEDIUM
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 1% percentile: 74 · as of 7 November 2026
- CWE
- CWE-476
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