Description
In the Linux kernel, the following vulnerability has been resolved: scsi: target: iblock: Fix wrong PR ops NULL check for PREEMPT/RELEASE In the iblock_execute_pr_out() function, PRO_PREEMPT, PRO_PREEMPT_AND_ABORT, and PRO_RELEASE all perform callback capability checks through ops->pr_clear. The error check allows unimplemented hooks to pass through the gate, resulting dereferencing a NULL function pointer. Check whether the hooks that need to be called are supported.
References5
- git.kernel.org/stable/c/3c60a8b4037dc35e365658fcbcb349a5d742ff49
- git.kernel.org/stable/c/9c33222bd387312874fbe36ca8002e5c945b9653
- git.kernel.org/stable/c/a326b19cfb7775378b50acaa8d836ba44e29b4c2
- git.kernel.org/stable/c/bdd8a1297ef101bb5ac57e53b4fbe5e364afd8b1
- git.kernel.org/stable/c/f15bcf9a99b1b2683fcfa005b9b3680b5600581f
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 0% percentile: 39 · as of 8 November 2026
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.