high · 7.5

In the Linux kernel, the following vulnerability has been resolved: scsi: target: iblock: Fix wrong PR ops NULL check for PREEMPT/RELEAS…

CVE-2026-80691 · published 28 Aug 2026

How serious is it

Severity: high, CVSS score 7.5 out of 10.
No exploit prediction (EPSS) score yet.
Not on the CISA list of exploited vulnerabilities.
No public exploit in Exploit-DB.

Is your app affected by CVE-2026-80691?

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Who is affected

Linux Linux: 6.5

How to check

Find out whether you run the affected product and which version, then compare it with the versions above.

How to fix

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Apply the vendor's update or mitigation from the references below. If there is none yet, limit exposure of the affected service until there is.
If a vulnerable version was live, check your logs and rotate the secrets that server could read.

The advisory

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.

Check your whole app

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References

Merged from NVD. Last updated 24 Oct 2026. All vulnerabilities · RSS · JSON

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