5.5

CVE-2025-38191

ksmbd: fix null pointer dereference in destroy_previous_session

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().
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 5.15 < 6.1.142
Linux ≫ Linux Kernel Version >= 6.2 < 6.6.95
Linux ≫ Linux Kernel Version >= 6.7 < 6.12.35
Linux ≫ Linux Kernel Version >= 6.13 < 6.15.4
Linux ≫ Linux Kernel Version6.16 Updaterc1
Linux ≫ Linux Kernel Version6.16 Updaterc2
Debian ≫ Debian Linux Version11.0
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.48% 0.377
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-476 NULL Pointer Dereference

The product dereferences a pointer that it expects to be valid but is NULL.

https://git.kernel.org/stable/c/281afc52e2961cd5dd8326ebc9c5bc40904c0468
Patch
https://git.kernel.org/stable/c/0902625a24eea7fdc187faa5d97df244d159dd6e
Patch
https://git.kernel.org/stable/c/1193486dffb7432a09f57f5d09049b4d4123538b
Patch
https://git.kernel.org/stable/c/076f1adefb9837977af7ed233883842ddc446644
Patch
https://git.kernel.org/stable/c/7ac5b66acafcc9292fb935d7e03790f2b8b2dc0e
Patch
https://www.zerodayinitiative.com/advisories/ZDI-25-610/
Third Party Advisory
https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
Third Party Advisory