CVE-2026-23193: Linux Kernel

High severity, CVSS 7.8. EPSS: 0.3% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: scsi: target: iscsi: Fix use-after-free in iscsit_dec_session_usage_count() In iscsit_dec_session_usage_count(), the function calls complete() while holding the sess->session_usage_lock. Similar to the connection usage count logic, the waiter signaled by complete() (e.g., in the session release path) may wake up and free the iscsit_session structure immediately. This creates a race condition where the current thread may attempt to execute spin_unlock_bh() on a session structure that has already been deallocated, resulting in a KASAN slab-use-after-free. To resolve this, release the session_usage_lock before calling complete() to ensure all dereferences of the sess pointer are finished before the waiter is allowed to proceed with deallocation.

Affected products

• Linux Linux Kernel: from 3.1, before 5.10.250 (fixed in 5.10.250); from 5.11, before 5.15.200 (fixed in 5.15.200); from 5.16, before 6.1.163 (fixed in 6.1.163); from 6.2, before 6.6.124 (fixed in 6.6.124); from 6.7, before 6.12.70 (fixed in 6.12.70); from 6.13, before 6.18.10 (fixed in 6.18.10); …

Published 2026-02-14. Last modified 2026-06-17.