CVE-2026-23193
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.24%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.24% probability · 15th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-416
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/11ebafffce31efc6abeb28c509017976fc49f1caPatch
- https://git.kernel.org/stable/c/2b64015550a13bcc72910be0565548d9a754d46dPatch
- https://git.kernel.org/stable/c/41b86a9ec037bd3435d68dd3692f0891a207e7e7Patch
- https://git.kernel.org/stable/c/4530f4e4d0e6a207110b0ffed0c911bca43531a4Patch
- https://git.kernel.org/stable/c/84dc6037390b8607c5551047d3970336cb51ba9aPatch
- https://git.kernel.org/stable/c/d8dbdc146e9e9a976931b78715be2e91299049f9Patch
- https://git.kernel.org/stable/c/fd8b0900173307039d3a84644c2fee041a7ed4fbPatch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.