SB2026052841 - Improper Check or Handling of Exceptional Conditions in Linux kernel kvm svm

Description

This security bulletin contains information about 1 vulnerability.

1) Improper Check or Handling of Exceptional Conditions (CVE-ID: CVE-2026-46032)

CWE-ID: CWE-703 - Improper Check or Handling of Exceptional Conditions

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper error handling in nested_svm_vmexit() in KVM nSVM when handling a nested #VMEXIT after a failure to restore the host CR3. A local user can trigger a failure while loading L1's CR3 to cause a denial of service.

The issue can leave the guest running with corrupted state after the error is ignored.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/5d291ef0585ed880ed4dd71ea1a5965e0a65fb53
• https://git.kernel.org/stable/c/9a738cf170a4a2332ea3a15e23ec65b5757fe4a1