CVE-2026-80554Critical· 9.3▾ MidnightIn 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 arb…
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 51.2 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.2%
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.
Linux >= 0a19e61e6d4c6192077ead760ba0a2d350987d4c < 15fb4559a7fdf0b8725e433a71cfd03a1313a48bLinux >= 0a19e61e6d4c6192077ead760ba0a2d350987d4c < a1625f66eaa1200068a0e2c05bc90e65182fc4e3Linux >= 0a19e61e6d4c6192077ead760ba0a2d350987d4c < 06f4d6e5a8af6c2072e8cd39dbc512c683ca7fb2Linux >= 0a19e61e6d4c6192077ead760ba0a2d350987d4c < 4ee94790490ae8dcc97df8597f07836c8a81bbcfLinux >= 0a19e61e6d4c6192077ead760ba0a2d350987d4c < 5405c90d6a47b3014e74ee0618a162449abbbc93Linux 4.12Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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