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CVE-2026-80873 (GCVE-0-2026-80873)

Vulnerability from cvelistv5 – Published: 2026-09-04 16:48 – Updated: 2026-09-04 16:48
VLAI
Title
KVM: arm64: nv: Write ESR_EL2 for injected nested SError exceptions
Summary
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 77ee70a073575977b403e9add25f185d614217d8 , < 09f35145f3a4aacea4d9b914ad895bf5af8fc4ae (git)
Affected: 77ee70a073575977b403e9add25f185d614217d8 , < 29227821e2320ff6a174c91742b4ce221fe8d563 (git)
Affected: 77ee70a073575977b403e9add25f185d614217d8 , < e2cb1f4578625e71f461d5c1ce70984193389cbb (git)
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Linux Linux Affected: 6.17
Unaffected: 0 , < 6.17 (semver)
Unaffected: 6.18.40 , ≤ 6.18.* (semver)
Unaffected: 7.1.5 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: nv: Write ESR_EL2 for injected nested SError exceptions\n\nkvm_inject_el2_exception() writes ESR_EL2 for synchronous exceptions\nbut not for SError. enter_exception64() does not write ESR_ELx for any\nexception type, so the constructed syndrome is dropped. A guest L2\nhypervisor taking a nested SError observes stale ESR_EL2.\n\nThis affects both kvm_inject_nested_serror() and the EASE path in\nkvm_inject_nested_sea().\n\nWrite ESR_EL2 for except_type_serror, matching except_type_sync."
        }
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        "dateUpdated": "2026-09-04T16:48:40.889Z",
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      "cve": "CVE-2026-80873",
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      "source": "SUSE CSAF VEX",
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      "title": "SUSE CVE CVE-2026-80873",
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}



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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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