CVE-2026-46071

medium

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…

Vendor / product: Linux — linux kernel

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().

CVSS

5.5

5.5 (CVSS v3.1)

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Severity source: NVD CVSS v3.1 (nvd@nist.gov)

Timeline (UTC)

Published: 2026-05-27 14:17

Modified: 2026-10-30 13:18

NVD status: Undergoing Analysis

Last synced 3 days ago

Verified against the source API 2026-10-30 13:38 UTC

Exploitation

Not listed in CISA KEV (as of last catalog sync)

Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).

Affected products

linux / linux_kernel ≥5.19 <6.18.27, ≥6.19 <7.0.4

Weakness classification (CWE)

NVD-CWE-noinfo

Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.

Mitigation & advisories

Patch / mitigation: https://git.kernel.org/stable/c/9efe23568806d1cd06f7d146f9b3037b8d585a9f

Patch / mitigation: https://git.kernel.org/stable/c/a3f0981a5a0e0bd51ad74cc7d9eed32294b24002

Patch / mitigation: https://git.kernel.org/stable/c/b53ab5167a81537777ac780bbd93d32613aa3bda

References

https://git.kernel.org/stable/c/11d347b7edf5093d69aca72317300798a32bfd6b 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/165b08d2d1346dce5ed43db65e10f3194b9ae2fe 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/9efe23568806d1cd06f7d146f9b3037b8d585a9f 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/a3f0981a5a0e0bd51ad74cc7d9eed32294b24002 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/b53ab5167a81537777ac780bbd93d32613aa3bda 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/b7fefb393a926bdfe445c63b4091185ed7da2733 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Data sources

NVD CVE API 2.0 — fetched 2026-10-30 13:38 UTC · record ↗

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CVE-2026-46071

Affected products

Weakness classification (CWE)

Mitigation & advisories

References

Data sources

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