UBUNTU-CVE-2026-23216
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().
02 / AFFECTED SOFTWARE
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03 / CONNECTIONS
Connected vulnerabilities
04 / EVIDENCE
Source records
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().
05 / REFERENCES
Further evidence
- https://git.kernel.org/linus/9411a89e9e7135cc459178fa77a3f1d6191ae903
- 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
- https://ubuntu.com/security/CVE-2026-23216
- https://ubuntu.com/security/notices/USN-8278-1
- https://ubuntu.com/security/notices/USN-8278-2
- https://ubuntu.com/security/notices/USN-8289-1
- https://ubuntu.com/security/notices/USN-8289-2
- https://ubuntu.com/security/notices/USN-8296-1
- https://ubuntu.com/security/notices/USN-8296-2
- https://ubuntu.com/security/notices/USN-8393-1
- https://ubuntu.com/security/notices/USN-8440-1
- https://ubuntu.com/security/notices/USN-8493-1
- https://ubuntu.com/security/notices/USN-8493-2
- https://ubuntu.com/security/notices/USN-8499-1
- https://ubuntu.com/security/notices/USN-8527-1
- https://ubuntu.com/security/notices/USN-8528-1
- https://ubuntu.com/security/notices/USN-8547-1
- https://ubuntu.com/security/notices/USN-8547-2
- https://www.cve.org/CVERecord?id=CVE-2026-23216