{"id":"CVE-2026-98472","published":"2026-10-18T16:16:57.697","lastModified":"2026-10-19T10:18:57.743","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: SEV: Free have_run_cpus during VM destruction even if VM is no longer SEV\n\nUnconditionally free SEV's \"have run CPUs\" cpumask in the VM destroy path,\ni.e. even for what appear to be non-SEV VMs, as an SEV VM becomes a non-SEV\nVM if its state is intra-host migrated.  Alternatively, the mask could be\nfreed in sev_migrate_from() when \"converting\" the source VM, but that gets\nannoying because ideally KVM would nullify the mask to guard against UAF,\nand nullifying the mask would need be conditioned on CPUMASK_OFFSTACK=y.\n\nFreeing the mask during sev_migrate_from() is also not robust against other\nKVM bugs, though that's kind of a moot point since any such bugs would show\nup even if sev->active is never set.  I.e. KVM must get that side of things\ncorrect.  But, that's not a great reason to add more code just to make\nthings marginally less robust.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/12c1f6e03f944e399bd2c88441dca5dc702b95a5","tags":[]},{"url":"https://git.kernel.org/stable/c/6aef7cf800098749ff5d660222efaf6e01e98c09","tags":[]},{"url":"https://git.kernel.org/stable/c/9784e5ca91b37b387f3f414af4340c54f7a63566","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}