CVE-2026-72277

Summary

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 Software

VendorProductVersion RangeStatus
LinuxLinux2a359e072596fcb2e9e85017a865e3618a2fe5b5 < d5436e18e4fc2886ac306304d884ea3b92e1edbfaffected
LinuxLinux2a359e072596fcb2e9e85017a865e3618a2fe5b5 < bc00e0e376ee3572f5d26c174473abef1e35deccaffected
LinuxLinux2a359e072596fcb2e9e85017a865e3618a2fe5b5 < 4bd7dbe0b2243e6aa735cae4d5e1ff988b30b2a6affected
LinuxLinux6.16affected
LinuxLinux0 < 6.16unaffected
LinuxLinux6.18.40 <= 6.18.*unaffected
LinuxLinux7.1.5 <= 7.1.*unaffected
LinuxLinux7.2 <= *unaffected

Weaknesses

References