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

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Summary

CVECVE-2026-80873
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-04 17:16:59 UTC
Updated2026-09-04 17:16:59 UTC
DescriptionIn 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.

Risk And Classification

EPSS: 0.001540000 probability, percentile 0.048790000 (date 2026-09-07)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 77ee70a073575977b403e9add25f185d614217d8 09f35145f3a4aacea4d9b914ad895bf5af8fc4ae git Not specified
CNA Linux Linux affected 77ee70a073575977b403e9add25f185d614217d8 29227821e2320ff6a174c91742b4ce221fe8d563 git Not specified
CNA Linux Linux affected 77ee70a073575977b403e9add25f185d614217d8 e2cb1f4578625e71f461d5c1ce70984193389cbb git Not specified
CNA Linux Linux affected 6.17 Not specified
CNA Linux Linux unaffected 6.17 semver Not specified
CNA Linux Linux unaffected 6.18.40 6.18.* semver Not specified
CNA Linux Linux unaffected 7.1.5 7.1.* semver Not specified
CNA Linux Linux unaffected 7.2 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/29227821e2320ff6a174c91742b4ce221fe8d563 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e2cb1f4578625e71f461d5c1ce70984193389cbb 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/09f35145f3a4aacea4d9b914ad895bf5af8fc4ae 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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