CVE-2026-80547 (CVSS 8.8)

Description

In the Linux kernel, the following vulnerability has been resolved: s390/vfio_ccw: Implement a crw lock Unlike the channel_program struct, which covers synchronous I/O submissions and asynchronous interrupts, the CRW region relies exclusively on asynchronous events coming from hardware. Implement a lock to manage the list of those payloads, to ensure they are read cohesively.

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CVSS v3.1 Score

8.8

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

EPSS — Exploit Prediction

0.0018

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/0edd222730a9d7ec98368aaf1d40ee2d8d862e61 https://git.kernel.org/stable/c/16b0798024c0e9117e395829ddbbe70981c79d9c https://git.kernel.org/stable/c/3c94d4179bcc19e01b28db634c07a58b28116209 https://git.kernel.org/stable/c/49fa26b0df009dc1f420980bd71780e70615b83b https://git.kernel.org/stable/c/7902be374cbfc11c3435e1e87bf22195bf06a558 https://git.kernel.org/stable/c/a3d60ae24183eee352c8e87a0ff94c97cd87f156 https://git.kernel.org/stable/c/c76c4ee72bfc3824f4f491f18ed0323bf2e2daf9

Frequently Asked Questions

What is CVE-2026-80547? +

In the Linux kernel, the following vulnerability has been resolved: s390/vfio_ccw: Implement a crw lock Unlike the channel_program struct, which covers synchronous I/O submissions and asynchronous interrupts, the CRW region relies exclusively on asynchronous events coming from hardware. Implement a lock to manage the list of those payloads, to ensure they are read cohesively. It has a CVSS v3.1 base score of 8.8 (HIGH).

How severe is CVE-2026-80547? +

CVE-2026-80547 has a CVSS v3.1 score of 8.8 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0018, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-80547? +

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.

CVE-2026-80547