CVE-2026-80551
Critical
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.
SeverityCritical
CVSS9.3
Exploit probability—
Product
Linux
PublishedAug 26, 2026
First seenAug 26, 2026
How to fix
Update
- Linux Linux5b7c23440343e336259cd45017cc901a744c41b0, 460b977a4e71cc319fdadf91c193ec3beaa57263, 0d46c2565f173bcddcdcaf44a4f69789a20535e2, 08ef2a82115690d6e229615872ac1731af732497, fc59e9482117ebdccd6dc7fa8082f8b980fd021e, 565bef268d75bf7df665bce6923a88cd0eb74592 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 01aa26c672c0eb771de4aaa2a8ccf6055778887b ≤ v < 5b7c23440343e336259cd45017cc901a744c41b0, 01aa26c672c0eb771de4aaa2a8ccf6055778887b ≤ v < 460b977a4e71cc319fdadf91c193ec3beaa57263, 01aa26c672c0eb771de4aaa2a8ccf6055778887b ≤ v < 0d46c2565f173bcddcdcaf44a4f69789a20535e2, 01aa26c672c0eb771de4aaa2a8ccf6055778887b ≤ v < 08ef2a82115690d6e229615872ac1731af732497, 01aa26c672c0eb771de4aaa2a8ccf6055778887b ≤ v < fc59e9482117ebdccd6dc7fa8082f8b980fd021e, 01aa26c672c0eb771de4aaa2a8ccf6055778887b ≤ v < 565bef268d75bf7df665bce6923a88cd0eb74592, 5.3 | 5b7c23440343e336259cd45017cc901a744c41b0, 460b977a4e71cc319fdadf91c193ec3beaa57263, 0d46c2565f173bcddcdcaf44a4f69789a20535e2, 08ef2a82115690d6e229615872ac1731af732497, fc59e9482117ebdccd6dc7fa8082f8b980fd021e, 565bef268d75bf7df665bce6923a88cd0eb74592 |
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