Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: KVM: s390: Fix memory corruption by not reinjecting CK machine checks Channel-subsystem damage machine checks are for the host channel subsystem. The guest channel subsystem is emulated in the userspace VMM. There is no point in forwarding such machine checks into the guest. This also simplifies the machine check reinjection and avoids kfree of a stack variable as reported by sashiko. There might be still machine checks that have the ck bit set with another bit (like instruction damage), mask out the CK bit in s390_backup_mcck_info(), like the CP and ED bits already are.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 4d62fcc0b692e3b4058d7d138114c27cd8b011f7 before 5c63e2ed840c85e27172ab78e7db3ac77fba281b; affected 4d62fcc0b692e3b4058d7d138114c27cd8b011f7 before b7631982fb65dd355acd18e62b384bc8125e9c44; affected 4d62fcc0b692e3b4058d7d138114c27cd8b011f7 before 6ee52d3af2a1bf70349cf3f860933c8d221e229a; affected 4d62fcc0b692e3b4058d7d138114c27cd8b011f7 before 7077ec953996acc04b49d1dfc43df1c1a2a74395; affected 4d62fcc0b692e3b4058d7d138114c27cd8b011f7 before 546dde823a36d7283dcf46127c2f3d093443860f |
| Linux / Linux | affected 4.13; unaffected 0 before 4.13; unaffected 6.6.160 through 6.6.*; unaffected 6.12.114 through 6.12.*; unaffected 6.18.51 through 6.18.*; unaffected 7.2.5 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/5c63e2ed840c85e27172ab78e7db3ac77fba281b
- https://git.kernel.org/stable/c/b7631982fb65dd355acd18e62b384bc8125e9c44
- https://git.kernel.org/stable/c/6ee52d3af2a1bf70349cf3f860933c8d221e229a
- https://git.kernel.org/stable/c/7077ec953996acc04b49d1dfc43df1c1a2a74395
- https://git.kernel.org/stable/c/546dde823a36d7283dcf46127c2f3d093443860f