CVE-2026-80551
s390/vfio_ccw: Ensure first IDAW remains constant
CVSS Score
9.3
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Aug 26, 2026 |
| Last Updated | Aug 27, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Linux / Linux
01aa26c672c0eb771de4aaa2a8ccf6055778887b < 460b977a4e71cc319fdadf91c193ec3beaa57263 01aa26c672c0eb771de4aaa2a8ccf6055778887b < 0d46c2565f173bcddcdcaf44a4f69789a20535e2 01aa26c672c0eb771de4aaa2a8ccf6055778887b < 08ef2a82115690d6e229615872ac1731af732497 01aa26c672c0eb771de4aaa2a8ccf6055778887b < fc59e9482117ebdccd6dc7fa8082f8b980fd021e 01aa26c672c0eb771de4aaa2a8ccf6055778887b < 565bef268d75bf7df665bce6923a88cd0eb74592
Linux / Linux
5.3
References
git.kernel.org: https://git.kernel.org/stable/c/460b977a4e71cc319fdadf91c193ec3beaa57263 git.kernel.org: https://git.kernel.org/stable/c/0d46c2565f173bcddcdcaf44a4f69789a20535e2 git.kernel.org: https://git.kernel.org/stable/c/08ef2a82115690d6e229615872ac1731af732497 git.kernel.org: https://git.kernel.org/stable/c/fc59e9482117ebdccd6dc7fa8082f8b980fd021e git.kernel.org: https://git.kernel.org/stable/c/565bef268d75bf7df665bce6923a88cd0eb74592