{"id":"CVE-2026-80873","state":"PUBLISHED","title":"KVM: arm64: nv: Write ESR_EL2 for injected nested SError exceptions","description":"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.","publishedAt":"2026-09-04T16:48:40.889Z","updatedAt":"2026-09-04T16:48:40.889Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"77ee70a073575977b403e9add25f185d614217d8","status":"affected","lessThan":"09f35145f3a4aacea4d9b914ad895bf5af8fc4ae","versionType":"git"},{"version":"77ee70a073575977b403e9add25f185d614217d8","status":"affected","lessThan":"29227821e2320ff6a174c91742b4ce221fe8d563","versionType":"git"},{"version":"77ee70a073575977b403e9add25f185d614217d8","status":"affected","lessThan":"e2cb1f4578625e71f461d5c1ce70984193389cbb","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/arm64/kvm/emulate-nested.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.17","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.17","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.5","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/arm64/kvm/emulate-nested.c"]}],"references":["https://git.kernel.org/stable/c/09f35145f3a4aacea4d9b914ad895bf5af8fc4ae","https://git.kernel.org/stable/c/29227821e2320ff6a174c91742b4ce221fe8d563","https://git.kernel.org/stable/c/e2cb1f4578625e71f461d5c1ce70984193389cbb"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:07.220Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/80xxx/CVE-2026-80873.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-80873","state":"PUBLISHED","datePublished":"2026-09-04T16:48:40.889Z","dateUpdated":"2026-09-04T16:48:40.889Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-08-26T14:34:25.798Z"},"containers":{"cna":{"title":"KVM: arm64: nv: Write ESR_EL2 for injected nested SError exceptions","descriptions":[{"lang":"en","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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"77ee70a073575977b403e9add25f185d614217d8","status":"affected","lessThan":"09f35145f3a4aacea4d9b914ad895bf5af8fc4ae","versionType":"git"},{"version":"77ee70a073575977b403e9add25f185d614217d8","status":"affected","lessThan":"29227821e2320ff6a174c91742b4ce221fe8d563","versionType":"git"},{"version":"77ee70a073575977b403e9add25f185d614217d8","status":"affected","lessThan":"e2cb1f4578625e71f461d5c1ce70984193389cbb","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/arm64/kvm/emulate-nested.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.17","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.17","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.5","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/arm64/kvm/emulate-nested.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/09f35145f3a4aacea4d9b914ad895bf5af8fc4ae"},{"url":"https://git.kernel.org/stable/c/29227821e2320ff6a174c91742b4ce221fe8d563"},{"url":"https://git.kernel.org/stable/c/e2cb1f4578625e71f461d5c1ce70984193389cbb"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-09-04T16:48:40.889Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.17","versionEndExcluding":"6.18.40"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.17","versionEndExcluding":"7.1.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.17","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}