CVE-2026-80549
Published Aug 26, 2026
Description
In the Linux kernel, the following vulnerability has been resolved: s390/vfio_ccw: Move cp cleanup out of not operational The fsm_notoper() routine is called when the device has been lost, and is (by definition) no longer operational. Since this can happen asynchronously from the normal behavior of the driver, the cleanup may happen when holding other locks in the calling sequence (notably, the cio subchannel lock). Push the cleanup of the private->cp resources to a workqueue, where it can be done out from under that lock sequence and a future patch can safely manage the locking requirements.
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References
Other References
https://git.kernel.org/stable/c/0c11f61a876ed6fcca53d442ed3f33ea8362a0f9
https://git.kernel.org/stable/c/4e3301e2a651d742c05914f6074a25b8e41bce19
https://git.kernel.org/stable/c/56100baa0eb7055b1026dfa73e696e8066ff71fd
https://git.kernel.org/stable/c/af1759d8e6e6da9ba94f30a2f92546f406899aa7
https://git.kernel.org/stable/c/f98a9890ca42f4223d2d4c50e0660af3e012fcb4
Frequently Asked Questions
What is CVE-2026-80549? +
In the Linux kernel, the following vulnerability has been resolved:
s390/vfio_ccw: Move cp cleanup out of not operational
The fsm_notoper() routine is called when the device has been
lost, and is (by definition) no longer operational. Since this
can happen asynchronously from the normal behavior of the
driver, the cleanup may happen when holding other locks
in the calling sequence (notably, the cio subchannel lock).
Push the cleanup of the private->cp resources to a workqueue,
where it can be done out from under that lock sequence and
a future patch can safely manage the locking requirements.
How do I check if I'm vulnerable to CVE-2026-80549? +
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.