CVE-2026-80548
CVE CVE-2026-80548EUVD EUVD-2026-66463Published 2026-08-26T14:37:18.000ZLast changed 2026-08-27T12:40:08.000ZCVSS 8.8
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: s390/vfio_ccw: Selectively expand io_mutex The io_mutex was defined to serialize the io_regions, but then has also sort of been associated with the I/O themselves because of the close relationship they share. With the handful of races that are possible, the choices are either to: A) expand the scope of io_mutex to close these remaining windows, or B) reduce the scope of io_mutex to just io_region, and introduce a new lock mechanism for the remaining I/O resources This patch implements A, since B brings with it a lot more interactions that would need to be tracked and kept in a correct hierarchy. It also takes advantage of the workqueue element for cp_free() that now gets called out of fsm_notoper(), which could be invoked out of an interrupt context and thus cannot acquire a mutex itself.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux patch: 0; 4f76617378ee97c557b526cb58d3c61eb0a9c963 <b6aecea4b2b246f9fbd98a5712daa1193a60818e; patch: 6.1.185; patch: 7.1.10; patch: 6.12.105; 4f76617378ee97c557b526cb58d3c61eb0a9c963 <34f4feff3e90bd09308fad0974e97113b23b812a; patch: 6.6.153; 4f76617378ee97c557b526cb58d3c61eb0a9c963 <2ba9efdf9ebedc4e54df4b56aa3b43a65f7967cd; 4f76617378ee97c557b526cb58d3c61eb0a9c963 <56d7488533ceac4e986e96e15c9e487a2245bc01; 4f76617378ee97c557b526cb58d3c61eb0a9c963 <f72a51810d49411bd8cad0c2df8592320a2fe5cc; 5.2; 4f76617378ee97c557b526cb58d3c61eb0a9c963 <2a5ac0c0f1f7da33929211a2e41911bf72ee35d8; patch: 5.15.218; patch: 6.18.46; 4f76617378ee97c557b526cb58d3c61eb0a9c963 <dab6a6627b0b0cce23653e99c7b0bf8c6cfd82e0; patch: 7.2
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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