GHSA-HW7G-293V-4F3G
Vulnerability from github – Published: 2026-09-04 18:31 – Updated: 2026-09-04 18:31In 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.
{
"affected": [],
"aliases": [
"CVE-2026-80873"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-04T17:16:59Z",
"severity": null
},
"details": "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.",
"id": "GHSA-hw7g-293v-4f3g",
"modified": "2026-09-04T18:31:31Z",
"published": "2026-09-04T18:31:31Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-80873"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/09f35145f3a4aacea4d9b914ad895bf5af8fc4ae"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/29227821e2320ff6a174c91742b4ce221fe8d563"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e2cb1f4578625e71f461d5c1ce70984193389cbb"
}
],
"schema_version": "1.4.0",
"severity": []
}
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