CVE-2026-80873

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.

• https://git.kernel.org/stable/c/09f35145f3a4aacea4d9b914ad895bf5af8fc4ae
• https://git.kernel.org/stable/c/29227821e2320ff6a174c91742b4ce221fe8d563
• https://git.kernel.org/stable/c/e2cb1f4578625e71f461d5c1ce70984193389cbb

Published

Sep 4, 2026

Last Modified

Sep 4, 2026

Status

Received

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