CVE-2025-38191
High
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().
SeverityHigh
CVSS7.5
Exploit probability—
Product
Linux Kernel
PublishedJul 4, 2025
First seenJul 4, 2025
How to fix
Update
- linux linux_kernel6.1.142, 6.6.95, 6.12.35, 6.15.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 5.15 ≤ v < 6.1.142, 6.2 ≤ v < 6.6.95, 6.7 ≤ v < 6.12.35, 6.13 ≤ v < 6.15.4, 6.16 | 6.1.142, 6.6.95, 6.12.35, 6.15.4 |
| debian debian_linux | 11.0 | — |
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