CVE-2026-80554
CRITICAL
INFO
Priority: 0.02
BB Relevance:
54/100
Published: 2026-08-26
Modified: 2026-10-30
First seen: 2026-10-30
Status: active
Attack Surface
Low Complexity
No Auth
No Interaction
Conf. Impact
Integ. Impact
Scope Change
CVSS Vector Breakdown
AV:
Local
AC:
Low
PR:
None
UI:
None
S:
Changed
C:
High
I:
High
A:
High
Description
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.
Affected Software (7)
| Vendor | Product | Version |
|---|---|---|
| Linux | Linux | 0a19e61e6d4c6192077ead760ba0a2d350987d4c < 2ce00bb19db13606cda79f4b7aae4d9775de3096 |
| Linux | Linux | 0a19e61e6d4c6192077ead760ba0a2d350987d4c < 15fb4559a7fdf0b8725e433a71cfd03a1313a48b |
| Linux | Linux | 0a19e61e6d4c6192077ead760ba0a2d350987d4c < a1625f66eaa1200068a0e2c05bc90e65182fc4e3 |
| Linux | Linux | 0a19e61e6d4c6192077ead760ba0a2d350987d4c < 06f4d6e5a8af6c2072e8cd39dbc512c683ca7fb2 |
| Linux | Linux | 0a19e61e6d4c6192077ead760ba0a2d350987d4c < 4ee94790490ae8dcc97df8597f07836c8a81bbcf |
| Linux | Linux | 0a19e61e6d4c6192077ead760ba0a2d350987d4c < 5405c90d6a47b3014e74ee0618a162449abbbc93 |
| Linux | Linux | 4.12 |