CVE-2026-46071KVM: nSVM: Avoid clearing VMCB_LBR in vmcb12
- 5.5MediumCVSS base score
- 0.12%Exploitation in 30 daysEPSS · top 98% 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: Avoid clearing VMCB_LBR in vmcb12 svm_copy_lbrs() always marks VMCB_LBR dirty in the destination VMCB. However, nested_svm_vmexit() uses it to copy LBRs to vmcb12, and clearing clean bits in vmcb12 is not architecturally defined. Move vmcb_mark_dirty() to callers and drop it for vmcb12. This also facilitates incoming refactoring that does not pass the entire VMCB to svm_copy_lbrs().
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 · Undergoing Analysis | 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)
- 0.12% · top 98% of all CVEs (12 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 d20c796ca3709801f8a7fa36e8770a3dd8ebd34e – < b7fefb393a926bdfe445c63b4091185ed7da2733
- affected d20c796ca3709801f8a7fa36e8770a3dd8ebd34e – < 165b08d2d1346dce5ed43db65e10f3194b9ae2fe
- affected d20c796ca3709801f8a7fa36e8770a3dd8ebd34e – < 11d347b7edf5093d69aca72317300798a32bfd6b
- affected d20c796ca3709801f8a7fa36e8770a3dd8ebd34e – < a3f0981a5a0e0bd51ad74cc7d9eed32294b24002
- affected d20c796ca3709801f8a7fa36e8770a3dd8ebd34e – < 9efe23568806d1cd06f7d146f9b3037b8d585a9f
- affected d20c796ca3709801f8a7fa36e8770a3dd8ebd34e – < b53ab5167a81537777ac780bbd93d32613aa3bda
- affected 5.19
- unaffected < 5.19
- unaffected 6.1.191 – ≤ 6.1.*
- unaffected 6.6.160 – ≤ 6.6.*
- unaffected 6.12.114 – ≤ 6.12.*
- unaffected 6.18.27 – ≤ 6.18.*
- unaffected 7.0.4 – ≤ 7.0.*
- unaffected 7.1 – ≤ *
References
References6
- https://git.kernel.org/stable/c/b7fefb393a926bdfe445c63b4091185ed7da2733 (opens in a new tab)
- https://git.kernel.org/stable/c/165b08d2d1346dce5ed43db65e10f3194b9ae2fe (opens in a new tab)
- https://git.kernel.org/stable/c/11d347b7edf5093d69aca72317300798a32bfd6b (opens in a new tab)
- https://git.kernel.org/stable/c/a3f0981a5a0e0bd51ad74cc7d9eed32294b24002 (opens in a new tab)
- https://git.kernel.org/stable/c/9efe23568806d1cd06f7d146f9b3037b8d585a9f (opens in a new tab)
- https://git.kernel.org/stable/c/b53ab5167a81537777ac780bbd93d32613aa3bda (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-2026-32453 (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-2026-46071)Record last updated .