CVE-2026-80873

Summary

In the Linux kernel, the following vulnerability has been resolved:

KVM: arm64: nv: Write ESR_EL2 for injected nested SError exceptions

kvm_inject_el2_exception() writes ESR_EL2 for synchronous exceptions but not for SError. enter_exception64() does not write ESR_ELx for any exception type, so the constructed syndrome is dropped. A guest L2 hypervisor taking a nested SError observes stale ESR_EL2.

This affects both kvm_inject_nested_serror() and the EASE path in kvm_inject_nested_sea().

Write ESR_EL2 for except_type_serror, matching except_type_sync.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux77ee70a073575977b403e9add25f185d614217d8 < 09f35145f3a4aacea4d9b914ad895bf5af8fc4aeaffected
LinuxLinux77ee70a073575977b403e9add25f185d614217d8 < 29227821e2320ff6a174c91742b4ce221fe8d563affected
LinuxLinux77ee70a073575977b403e9add25f185d614217d8 < e2cb1f4578625e71f461d5c1ce70984193389cbbaffected
LinuxLinux6.17affected
LinuxLinux0 < 6.17unaffected
LinuxLinux6.18.40 <= 6.18.*unaffected
LinuxLinux7.1.5 <= 7.1.*unaffected
LinuxLinux7.2 <= *unaffected

Weaknesses

References