CVE-2026-23216
Full vulnerability record from the local CVENow database.
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
HIGH
CVSS score
7.8
(v3.1)
Vulnerability status
Modified
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-02-18 15:18:42.957000
Last modified
2026-10-19 19:17:42.423000
View original CVE JSON
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"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-02-18T15:18:42.957",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: target: iscsi: Fix use-after-free in iscsit_dec_conn_usage_count()\n\nIn iscsit_dec_conn_usage_count(), the function calls complete() while\nholding the conn->conn_usage_lock. As soon as complete() is invoked, the\nwaiter (such as iscsit_close_connection()) may wake up and proceed to free\nthe iscsit_conn structure.\n\nIf the waiter frees the memory before the current thread reaches\nspin_unlock_bh(), it results in a KASAN slab-use-after-free as the function\nattempts to release a lock within the already-freed connection structure.\n\nFix this by releasing the spinlock before calling complete()."
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"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nscsi: target: iscsi: Corrección de uso después de liberación en iscsit_dec_conn_usage_count()\n\nEn iscsit_dec_conn_usage_count(), la función llama a complete() mientras mantiene el conn->conn_usage_lock. Tan pronto como se invoca complete(), el proceso en espera (como iscsit_close_connection()) puede despertarse y proceder a liberar la estructura iscsit_conn.\n\nSi el proceso en espera libera la memoria antes de que el hilo actual alcance spin_unlock_bh(), resulta en un KASAN slab-uso después de liberación, ya que la función intenta liberar un bloqueo dentro de la estructura de conexión ya liberada.\n\nEsto se corrige liberando el spinlock antes de llamar a complete()."
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