Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: s390/vfio_ccw: Ensure first IDAW remains constant The first IDAW in a list does not need to be on a 2K/4K boundary like all others, and so is read separately to accurately calculate the size of the buffer needed to read the full IDAL. Verify that the address found in the first IDAW is unchanged between reads, to ensure a consistent set of IDAWs being worked with.
CVSS Score
CRITICAL
References
- https://git.kernel.org/stable/c/08ef2a82115690d6e229615872ac1731af732497
- https://git.kernel.org/stable/c/0d46c2565f173bcddcdcaf44a4f69789a20535e2
- https://git.kernel.org/stable/c/460b977a4e71cc319fdadf91c193ec3beaa57263
- https://git.kernel.org/stable/c/565bef268d75bf7df665bce6923a88cd0eb74592
- https://git.kernel.org/stable/c/fc59e9482117ebdccd6dc7fa8082f8b980fd021e
FAQ
What is CVE-2026-80551?
CVE-2026-80551 is a vulnerability with a CVSS score of 9.3 (CRITICAL). In the Linux kernel, the following vulnerability has been resolved: s390/vfio_ccw: Ensure first IDAW remains constant The first IDAW in a list does not need to be on a 2K/4K boundary like all others...
How severe is CVE-2026-80551?
CVE-2026-80551 has been rated CRITICAL with a CVSS base score of 9.3/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-80551?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.