CVE-2025-37778: Debian Linux

High severity, CVSS 7.8. EPSS: 1.1% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: ksmbd: Fix dangling pointer in krb_authenticate krb_authenticate frees sess->user and does not set the pointer to NULL. It calls ksmbd_krb5_authenticate to reinitialise sess->user but that function may return without doing so. If that happens then smb2_sess_setup, which calls krb_authenticate, will be accessing free'd memory when it later uses sess->user.

Affected products

• Debian Debian Linux: version 11.0 only
• Linux Linux Kernel: from 5.15, before 6.1.135 (fixed in 6.1.135); from 6.2, before 6.6.88 (fixed in 6.6.88); from 6.7, before 6.12.25 (fixed in 6.12.25); from 6.13, before 6.14.4 (fixed in 6.14.4); version 6.15 only

Published 2025-05-01. Last modified 2026-08-04.