CVE-2026-80873 is a vulnerability in Linux Kernel
Published on September 4, 2026
KVM: arm64: nv: Write ESR_EL2 for injected nested SError exceptions
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.
Products Associated with CVE-2026-80873
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Affected Versions
Linux:- Version 77ee70a073575977b403e9add25f185d614217d8 and below 09f35145f3a4aacea4d9b914ad895bf5af8fc4ae is affected.
- Version 77ee70a073575977b403e9add25f185d614217d8 and below 29227821e2320ff6a174c91742b4ce221fe8d563 is affected.
- Version 77ee70a073575977b403e9add25f185d614217d8 and below e2cb1f4578625e71f461d5c1ce70984193389cbb is affected.
- Version 6.17 is affected.
- Before 6.17 is unaffected.
- Version 6.18.40, <= 6.18.* is unaffected.
- Version 7.1.5, <= 7.1.* is unaffected.
- Version 7.2, <= * is unaffected.