Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: nv: Avoid dereferencing NULL VNCR pseudo-TLB VNCR TLB invalidation occurs from MMU notifiers or TLBI instructions, and either can race against a vcpu not being onlined yet (no pseudo-TLB allocated). Similarly, the TLB might be invalid, and the invalidation should be skipped in this case. Both kvm_invalidate_vncr_ipa() and kvm_invalidate_vncr_va() are expected to perform the same checks, except that the latter doesn't check for the allocation and blindly dereferences the pointer. Solve this by introducing a new iterator built on top of the usual kvm_for_each_vcpu() that checks for both of the above conditions, and convert the two users to it.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 6.16, < 6.18.39 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/4be6cbeb93d26994bd1827ddbce391e3c4395c8fPatch
- https://git.kernel.org/stable/c/5fd30133af864a1de0a0bd87d3fe3cf23205fbc7Patch
- https://git.kernel.org/stable/c/7c73a269a880b1399baacfb9d521415e6ef7ecc2Patch
FAQ
What is CVE-2026-64288?
CVE-2026-64288 is a vulnerability with a CVSS score of 5.5 (MEDIUM). In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: nv: Avoid dereferencing NULL VNCR pseudo-TLB VNCR TLB invalidation occurs from MMU notifiers or TLBI instructions, and...
How severe is CVE-2026-64288?
CVE-2026-64288 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-64288?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.