- 5.5MediumCVSS base score
- 0.10%Exploitation in 30 daysEPSS · top 99% 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: SVM: Add missing save/restore handling of LBR MSRs MSR_IA32_DEBUGCTLMSR and LBR MSRs are currently not enumerated by KVM_GET_MSR_INDEX_LIST, and LBR MSRs cannot be set with KVM_SET_MSRS. So save/restore is completely broken. Fix it by adding the MSRs to msrs_to_save_base, and allowing writes to LBR MSRs from userspace only (as they are read-only MSRs) if LBR virtualization is enabled. Additionally, to correctly restore L1's LBRs while L2 is running, make sure the LBRs are copied from the captured VMCB01 save area in svm_copy_vmrun_state(). Note, for VMX, this also fixes a flaw where MSR_IA32_DEBUGCTLMSR isn't reported as an MSR to save/restore. Note #2, over-reporting MSR_IA32_LASTxxx on Intel is ok, as KVM already handles unsupported reads and writes thanks to commit b5e2fec0ebc3 ("KVM: Ignore DEBUGCTL MSRs with no effect") (kvm_do_msr_access() will morph the unsupported userspace write into a nop). [sean: guard with lbrv checks, massage changelog]
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)
- 0.10% · top 99% of all CVEs (11 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 24e09cbf480a72f9c952af4ca77b159503dca44b – < bca0597272f9712b1f8ebd38b184db1dc2902ff7
- affected 24e09cbf480a72f9c952af4ca77b159503dca44b – < 4428a0a8643b0acf4ed7b8ea3e5975023bf4aafb
- affected 24e09cbf480a72f9c952af4ca77b159503dca44b – < 2b922a42b531a82d7881add14a7698dcdc5e1f0a
- affected 24e09cbf480a72f9c952af4ca77b159503dca44b – < 13a89ada5dcfc2539514c83ba5a2c61157f1ec6c
- affected 24e09cbf480a72f9c952af4ca77b159503dca44b – < 3700f0788da6acf73b2df56690f4b201aa4aefd2
- affected 2.6.26
- unaffected < 2.6.26
- 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
References5
- https://git.kernel.org/stable/c/bca0597272f9712b1f8ebd38b184db1dc2902ff7 (opens in a new tab)
- https://git.kernel.org/stable/c/4428a0a8643b0acf4ed7b8ea3e5975023bf4aafb (opens in a new tab)
- https://git.kernel.org/stable/c/2b922a42b531a82d7881add14a7698dcdc5e1f0a (opens in a new tab)
- https://git.kernel.org/stable/c/13a89ada5dcfc2539514c83ba5a2c61157f1ec6c (opens in a new tab)
- https://git.kernel.org/stable/c/3700f0788da6acf73b2df56690f4b201aa4aefd2 (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-2026-32395 (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-2026-46014)Record last updated .