KVM: arm64: nv: Write ESR_EL2 for injected nested SError exceptions (CVE-2026-80873) | HOL Guard CVE

Unknown severity · Source severity not reportedCVE-2026-80873

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

Answer in brief

CVE-2026-80873 records a Unknown severity vulnerability in KVM: arm64: nv: Write ESR_EL2 for injected nested SError exceptions. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 4, 2026Updated Sep 4, 2026Source checked Sep 4, 2026First seen by HOL Sep 4, 2026Material review Sep 4, 2026

Upstream Advisory

Key facts

Risk: Unknown severitySource severity not reported
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=77ee70a073575977b403e9add25f185d614217d8 <09f35145f3a4aacea4d9b914ad895bf5af8fc4ae \|\| >=77ee70a073575977b403e9add25f185d614217d8 <29227821e2320ff6a174c91742b4ce221fe8d563 \|\| >=77ee70a073575977b403e9add25f185d614217d8 <e2cb1f4578625e71f461d5c1ce70984193389cbb	09f35145f3a4aacea4d9b914ad895bf5af8fc4ae, 29227821e2320ff6a174c91742b4ce221fe8d563, e2cb1f4578625e71f461d5c1ce70984193389cbb
Linux/Linuxgeneric	6.17	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 09f35145f3a4aacea4d9b914ad895bf5af8fc4ae if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 4, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 4, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 4, 2026

Sources and claim methodology

Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.