by Kastro
Paper/Archive/CVE-2026-72277

CVE-2026-72277

Linux Linux — KVM: arm64: nv: Inject SEA if guest VNCR isn't normal memory

EPSS 0.2%CVSS 9.3
critical.is priorityof 100
30
CVSS 9.3 (CNA)9.3 / 10 × 3027.9Not in CISA KEV+300.0EPSS percentile 9.1.091 × 201.8No public exploit+100.0SSVC exploitation: unknown+100.0
Description · from the CVE record

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: nv: Inject SEA if guest VNCR isn't normal memory When constructing an L1 VNCR mapping, KVM unconditionally uses cacheable memory attributes, even if the underlying PFN isn't memory. This gets particularly hairy if the endpoint doesn't support cacheable memory attributes, potentially throwing an SError on writeback... While KVM does permit cacheable memory attributes on certain PFNMAP VMAs, kvm_translate_vncr() isn't currently grabbing the VMA. So do the simpler thing for now and just reject everything that isn't memory.

Affected

ProductAffectedFixed inSource
Linux2a359e072596fcb2e9e85017a865e3618a2fe5b5 – < d5436e18e4fc2886ac306304d884ea3b92e1edbfd5436e18e4fc2886ac306304d884ea3b92e1edbfCNA
Linux2a359e072596fcb2e9e85017a865e3618a2fe5b5 – < bc00e0e376ee3572f5d26c174473abef1e35deccbc00e0e376ee3572f5d26c174473abef1e35deccCNA
Linux2a359e072596fcb2e9e85017a865e3618a2fe5b5 – < 4bd7dbe0b2243e6aa735cae4d5e1ff988b30b2a64bd7dbe0b2243e6aa735cae4d5e1ff988b30b2a6CNA
Linux6.166.18.40CNA

Scores by source

Linux (CNA)9.3CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

References

refgit.kernel.org/stable/c/d5436e18e4fc2886ac306304d884ea3b92e1edbfrefgit.kernel.org/stable/c/bc00e0e376ee3572f5d26c174473abef1e35deccrefgit.kernel.org/stable/c/4bd7dbe0b2243e6aa735cae4d5e1ff988b30b2a6