ksmbd: fix null pointer dereference in destroy_previous_session
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 1.1%
exploitation probability
1.1%top 37% of all CVEs
observed exploitation
nono source reports it
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().
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/076f1adefb9837977af7ed233883842ddc446644https://git.kernel.org/stable/c/0902625a24eea7fdc187faa5d97df244d159dd6ehttps://git.kernel.org/stable/c/1193486dffb7432a09f57f5d09049b4d4123538bhttps://git.kernel.org/stable/c/281afc52e2961cd5dd8326ebc9c5bc40904c0468https://git.kernel.org/stable/c/7ac5b66acafcc9292fb935d7e03790f2b8b2dc0ehttps://lists.debian.org/debian-lts-announce/2025/10/msg00008.htmlhttps://www.zerodayinitiative.com/advisories/ZDI-25-610/