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CVE-2026-80691

7.5 · HIGH

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…

Published Aug 28, 2026EPSS 0.44%

Overview

CVE-2026-80691 is a high-severity vulnerability. It was published on August 28, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/3c60a8b4037dc35e365658fcbcb349a5d742ff49Refgit.kernel.org/stable/c/9c33222bd387312874fbe36ca8002e5c945b9653Refgit.kernel.org/stable/c/a326b19cfb7775378b50acaa8d836ba44e29b4c2Refgit.kernel.org/stable/c/bdd8a1297ef101bb5ac57e53b4fbe5e364afd8b1Refgit.kernel.org/stable/c/f15bcf9a99b1b2683fcfa005b9b3680b5600581f

How CyberStrike helps

Frequently asked questions

What is CVE-2026-80691?

CVE-2026-80691 is a high-severity vulnerability. It was published on August 28, 2026 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2026-80691?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-80691?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-80691?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-80691 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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