Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 4ffa72ad8f37e73bbb6c0baa88557bcb4fd39929 before 7c73a269a880b1399baacfb9d521415e6ef7ecc2; affected 4ffa72ad8f37e73bbb6c0baa88557bcb4fd39929 before 5fd30133af864a1de0a0bd87d3fe3cf23205fbc7; affected 4ffa72ad8f37e73bbb6c0baa88557bcb4fd39929 before 4be6cbeb93d26994bd1827ddbce391e3c4395c8f |
| Linux / Linux | affected 6.16; unaffected 0 before 6.16; unaffected 6.18.39 through 6.18.*; unaffected 7.1.4 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.