{"cve":"CVE-2026-46032","nvd":{"published":"2026-05-27T14:17:22.190","modified":"2026-10-21T13:19:02.533","status":"Modified","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":[],"references":["https://git.kernel.org/stable/c/2e661773890e6ba6b16064fad961da3dd311be43","https://git.kernel.org/stable/c/5d291ef0585ed880ed4dd71ea1a5965e0a65fb53","https://git.kernel.org/stable/c/9a738cf170a4a2332ea3a15e23ec65b5757fe4a1","https://git.kernel.org/stable/c/af79992ecdb6817970d757fb5d853b8d9b55a0d6","https://git.kernel.org/stable/c/b0eb0a8959ac2b808eb11548d002fe1f9b5650cc"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-22T16:41:11.231219466+00:00"},"epss":{"cve":"CVE-2026-46032","score":0.0013,"percentile":0.02596,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}