CVE-2026-98472KVM: SEV: Free have_run_cpus during VM destruction even if VM is no longer SEV
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: KVM: SEV: Free have_run_cpus during VM destruction even if VM is no longer SEV Unconditionally free SEV's "have run CPUs" cpumask in the VM destroy path, i.e. even for what appear to be non-SEV VMs, as an SEV VM becomes a non-SEV VM if its state is intra-host migrated. Alternatively, the mask could be freed in sev_migrate_from() when "converting" the source VM, but that gets annoying because ideally KVM would nullify the mask to guard against UAF, and nullifying the mask would need be conditioned on CPUMASK_OFFSTACK=y. Freeing the mask during sev_migrate_from() is also not robust against other KVM bugs, though that's kind of a moot point since any such bugs would show up even if sev->active is never set. I.e. KVM must get that side of things correct. But, that's not a great reason to add more code just to make things marginally less robust.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 18, 2026
- First seen by InfoSec Signals
- Oct 18, 2026
Affected products
Linux Linux linux:linux (from the name) | 6f38f8c574642a822f2e85f079fa29a49176c49c builds before 6aef7cf800098749ff5d660222efaf6e01e98c09; from 6f38f8c574642a822f2e85f079fa29a49176c49c before 9784e5ca91b37b387f3f414af4340c54f7a63566; from 6f38f8c574642a822f2e85f079fa29a49176c49c before 12c1f6e03f944e399bd2c88441dca5dc702b95a5 | CNA record |
References
- https://git.kernel.org/stable/c/6aef7cf800098749ff5d660222efaf6e01e98c09
- https://git.kernel.org/stable/c/9784e5ca91b37b387f3f414af4340c54f7a63566
- https://git.kernel.org/stable/c/12c1f6e03f944e399bd2c88441dca5dc702b95a5
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.