CVE-2026-80873

    Dashboard / Vulnerabilities / CVE-2026-80873

    CVE-2026-80873

    Published: 4 Sept 2026Last Modified: 6 Sept 2026

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

    Details: 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.

    References: https://git.kernel.org/stable/c/09f35145f3a4aacea4d9b914ad895bf5af8fc4ae, https://git.kernel.org/stable/c/29227821e2320ff6a174c91742b4ce221fe8d563, https://git.kernel.org/stable/c/e2cb1f4578625e71f461d5c1ce70984193389cbb, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80873.json, https://nvd.nist.gov/vuln/detail/CVE-2026-80873, https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 77ee70a073575977b403e9add25f185d614217d8
    Fixed -09f35145f3a4aacea4d9b914ad895bf5af8fc4ae

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2026-80873 | CVE-DB