CVE-2026-23216
Published: February 21, 2026Last modified: February 21, 2026
Description
In the Linux kernel, the following vulnerability has been resolved: scsi: target: iscsi: Fix use-after-free in iscsit_dec_conn_usage_count() In iscsit_dec_conn_usage_count(), the function calls complete() while holding the conn->conn_usage_lock. As soon as complete() is invoked, the waiter (such as iscsit_close_connection()) may wake up and proceed to free the iscsit_conn structure. If the waiter frees the memory before the current thread reaches spin_unlock_bh(), it results in a KASAN slab-use-after-free as the function attempts to release a lock within the already-freed connection structure. Fix this by releasing the spinlock before calling complete().
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.8 |
| Attack Vector | LOCAL |
| Attack complexity | LOW |
| Privileges required | LOW |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | HIGH |
| Integrity impact | HIGH |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Fixed (6.1.163-r0) |
| 25 LTS | linux-lts | Fixed (6.12.73-r0) | |
| Stream | linux-lts | Fixed (6.12.71-r0) |
References
- https://git.kernel.org/stable/c/275016a551ba1a068a3bd6171b18611726b67110
- https://git.kernel.org/stable/c/3835e49e146a4e6e7787b29465f1a23379b6ec44
- https://git.kernel.org/stable/c/48fe983e92de2c59d143fe38362ad17ba23ec7f3
- https://git.kernel.org/stable/c/73b487d44bf4f92942629d578381f89c326ff77f
- https://git.kernel.org/stable/c/8518f072fc92921418cd9ed4268dd4f3e9a8fd75
- https://git.kernel.org/stable/c/9411a89e9e7135cc459178fa77a3f1d6191ae903
- https://git.kernel.org/stable/c/ba684191437380a07b27666eb4e72748be1ea201