CVE-2026-80551s390/vfio_ccw: Ensure first IDAW remains constant
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- 9.3 CRITICAL (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 01aa26c672c0eb771de4aaa2a8ccf6055778887b before 460b977a4e71cc319fdadf91c193ec3beaa57263; 01aa26c672c0eb771de4aaa2a8ccf6055778887b builds before 0d46c2565f173bcddcdcaf44a4f69789a20535e2; from 01aa26c672c0eb771de4aaa2a8ccf6055778887b before 08ef2a82115690d6e229615872ac1731af732497; from 01aa26c672c0eb771de4aaa2a8ccf6055778887b before fc59e9482117ebdccd6dc7fa8082f8b980fd021e; from 01aa26c672c0eb771de4aaa2a8ccf6055778887b before 565bef268d75bf7df665bce6923a88cd0eb74592 | CNA record |
References
- https://git.kernel.org/stable/c/460b977a4e71cc319fdadf91c193ec3beaa57263
- https://git.kernel.org/stable/c/0d46c2565f173bcddcdcaf44a4f69789a20535e2
- https://git.kernel.org/stable/c/08ef2a82115690d6e229615872ac1731af732497
- https://git.kernel.org/stable/c/fc59e9482117ebdccd6dc7fa8082f8b980fd021e
- https://git.kernel.org/stable/c/565bef268d75bf7df665bce6923a88cd0eb74592
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.