{"id":"CVE-2026-46032","summary":"KVM: nSVM: Triple fault if restore host CR3 fails on nested #VMEXIT","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: nSVM: Triple fault if restore host CR3 fails on nested #VMEXIT\n\nIf loading L1's CR3 fails on a nested #VMEXIT, nested_svm_vmexit()\nreturns an error code that is ignored by most callers, and continues to\nrun L1 with corrupted state. A sane recovery is not possible in this\ncase, and HW behavior is to cause a shutdown. Inject a triple fault\ninstead, and do not return early from nested_svm_vmexit(). Continue\ncleaning up the vCPU state (e.g. clear pending exceptions), to handle\nthe failure as gracefully as possible.\n\nFrom the APM:\n\n  Upon #VMEXIT, the processor performs the following actions in order to\n  return to the host execution context:\n\n  ...\n\n  if (illegal host state loaded, or exception while loading host state)\n      shutdown\n  else\n      execute first host instruction following the VMRUN\n\nRemove the return value of nested_svm_vmexit(), which is mostly\nunchecked anyway.","modified":"2026-11-01T02:30:53.520774597Z","published":"2026-05-27T12:56:41.159Z","related":["openSUSE-SU-2026:10954-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46032.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/2e661773890e6ba6b16064fad961da3dd311be43"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5d291ef0585ed880ed4dd71ea1a5965e0a65fb53"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9a738cf170a4a2332ea3a15e23ec65b5757fe4a1"},{"type":"WEB","url":"https://git.kernel.org/stable/c/af79992ecdb6817970d757fb5d853b8d9b55a0d6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b0eb0a8959ac2b808eb11548d002fe1f9b5650cc"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e6318570a9b4e137b0b744832b920b38bb069561"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46032.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-46032"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"d82aaef9c88aa27bce63751d6d6329920b1fe8da"},{"fixed":"e6318570a9b4e137b0b744832b920b38bb069561"},{"fixed":"2e661773890e6ba6b16064fad961da3dd311be43"},{"fixed":"af79992ecdb6817970d757fb5d853b8d9b55a0d6"},{"fixed":"b0eb0a8959ac2b808eb11548d002fe1f9b5650cc"},{"fixed":"9a738cf170a4a2332ea3a15e23ec65b5757fe4a1"},{"fixed":"5d291ef0585ed880ed4dd71ea1a5965e0a65fb53"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-46032.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"5.9.0"},{"fixed":"6.1.191"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.160"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.114"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.57"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.0.4"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-46032.json"}}],"schema_version":"1.9.2"}