CVE-2026-80691
Published Aug 28, 2026
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.
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EPSS — Exploit Prediction
0.0017
Probability of exploitation
0.06%
Percentile rank
EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.
References
Other References
https://git.kernel.org/stable/c/3c60a8b4037dc35e365658fcbcb349a5d742ff49
https://git.kernel.org/stable/c/9c33222bd387312874fbe36ca8002e5c945b9653
https://git.kernel.org/stable/c/a326b19cfb7775378b50acaa8d836ba44e29b4c2
https://git.kernel.org/stable/c/bdd8a1297ef101bb5ac57e53b4fbe5e364afd8b1
https://git.kernel.org/stable/c/f15bcf9a99b1b2683fcfa005b9b3680b5600581f
Frequently Asked Questions
What is CVE-2026-80691? +
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.
How do I check if I'm vulnerable to CVE-2026-80691? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.