CVE-2026-80554s390/vfio_ccw: Limit the number of channel program segments
Updated under an hour ago ()
Does this affect you?
It affects Linux. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
In the Linux kernel, the following vulnerability has been resolved: s390/vfio_ccw: Limit the number of channel program segments The processing of channel programs, and the CCWs within them, is done recursively. As such, there is an arbitrary (but not architectural) limit to the number of CCWs that can exist in a single channel program. The vfio-ccw logic breaks these channel programs into segments whenever it encounters a Transfer-In-Channel (TIC) CCW, and the combined number of segments count towards the global limit. Impose an equivalent limit to the number of segments until such logic can be made non-recursive.
- 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 0a19e61e6d4c6192077ead760ba0a2d350987d4c before 15fb4559a7fdf0b8725e433a71cfd03a1313a48b; from 0a19e61e6d4c6192077ead760ba0a2d350987d4c before a1625f66eaa1200068a0e2c05bc90e65182fc4e3; from 0a19e61e6d4c6192077ead760ba0a2d350987d4c before 06f4d6e5a8af6c2072e8cd39dbc512c683ca7fb2; from 0a19e61e6d4c6192077ead760ba0a2d350987d4c before 4ee94790490ae8dcc97df8597f07836c8a81bbcf; from 0a19e61e6d4c6192077ead760ba0a2d350987d4c before 5405c90d6a47b3014e74ee0618a162449abbbc93 | CNA record |
References
- https://git.kernel.org/stable/c/15fb4559a7fdf0b8725e433a71cfd03a1313a48b
- https://git.kernel.org/stable/c/a1625f66eaa1200068a0e2c05bc90e65182fc4e3
- https://git.kernel.org/stable/c/06f4d6e5a8af6c2072e8cd39dbc512c683ca7fb2
- https://git.kernel.org/stable/c/4ee94790490ae8dcc97df8597f07836c8a81bbcf
- https://git.kernel.org/stable/c/5405c90d6a47b3014e74ee0618a162449abbbc93
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.