CVE-2026-46032KVM: nSVM: Triple fault if restore host CR3 fails on nested #VMEXIT
- 5.5MediumCVSS base score
- 0.13%Exploitation in 30 daysEPSS · top 97% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: KVM: nSVM: Triple fault if restore host CR3 fails on nested #VMEXIT If loading L1's CR3 fails on a nested #VMEXIT, nested_svm_vmexit() returns an error code that is ignored by most callers, and continues to run L1 with corrupted state. A sane recovery is not possible in this case, and HW behavior is to cause a shutdown. Inject a triple fault instead, and do not return early from nested_svm_vmexit(). Continue cleaning up the vCPU state (e.g. clear pending exceptions), to handle the failure as gracefully as possible. From the APM: Upon #VMEXIT, the processor performs the following actions in order to return to the host execution context: ... if (illegal host state loaded, or exception while loading host state) shutdown else execute first host instruction following the VMRUN Remove the return value of nested_svm_vmexit(), which is mostly unchecked anyway.
Timeline
ID reserved
By Linux
- 14 days later
· 14 days later
Published
- 5 months later
· 5 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.13% · top 97% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected d82aaef9c88aa27bce63751d6d6329920b1fe8da – < e6318570a9b4e137b0b744832b920b38bb069561
- affected d82aaef9c88aa27bce63751d6d6329920b1fe8da – < 2e661773890e6ba6b16064fad961da3dd311be43
- affected d82aaef9c88aa27bce63751d6d6329920b1fe8da – < af79992ecdb6817970d757fb5d853b8d9b55a0d6
- affected d82aaef9c88aa27bce63751d6d6329920b1fe8da – < b0eb0a8959ac2b808eb11548d002fe1f9b5650cc
- affected d82aaef9c88aa27bce63751d6d6329920b1fe8da – < 9a738cf170a4a2332ea3a15e23ec65b5757fe4a1
- affected d82aaef9c88aa27bce63751d6d6329920b1fe8da – < 5d291ef0585ed880ed4dd71ea1a5965e0a65fb53
- affected 5.9
- unaffected < 5.9
- unaffected 6.1.191 – ≤ 6.1.*
- unaffected 6.6.160 – ≤ 6.6.*
- unaffected 6.12.114 – ≤ 6.12.*
- unaffected 6.18.57 – ≤ 6.18.*
- unaffected 7.0.4 – ≤ 7.0.*
- unaffected 7.1 – ≤ *
References
References6
- https://git.kernel.org/stable/c/e6318570a9b4e137b0b744832b920b38bb069561 (opens in a new tab)
- https://git.kernel.org/stable/c/2e661773890e6ba6b16064fad961da3dd311be43 (opens in a new tab)
- https://git.kernel.org/stable/c/af79992ecdb6817970d757fb5d853b8d9b55a0d6 (opens in a new tab)
- https://git.kernel.org/stable/c/b0eb0a8959ac2b808eb11548d002fe1f9b5650cc (opens in a new tab)
- https://git.kernel.org/stable/c/9a738cf170a4a2332ea3a15e23ec65b5757fe4a1 (opens in a new tab)
- https://git.kernel.org/stable/c/5d291ef0585ed880ed4dd71ea1a5965e0a65fb53 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-32413 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-46032)Record last updated .