s390/vfio_ccw: Ensure first IDAW remains constant
CVE-2026-80551 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-80551, released August 27, 2026. It is not reported as exploited. Patch Radar priority: High.
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.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| linux · Debian 13.5 (trixie) | 6.12.105-1 | DEBIAN-CVE-2026-80551 | Aug 27, 2026 |
| linux · Debian 14 | 7.1.10-1 | DEBIAN-CVE-2026-80551 | Aug 27, 2026 |
| linux-6.12 · Debian 12.15 (bookworm) | 6.12.107-1~deb12u1 | DEBIAN-CVE-2026-80551 | Aug 27, 2026 |
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