Description
In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: nv: Re-translate VNCR before injecting abort KVM faults in the VNCR page with FOLL_WRITE whenever the guest aborts for a write, similar to how a regular stage-2 mapping is handled. It is entirely possible that the guest reads from the VNCR before writing to it, in which case the PFN could only be read-only. Invalidate the VNCR TLB and re-fetch the translation upon taking a VNCR abort, allowing the host mapping to be faulted in for write the second time around. Interestingly enough, this also satisfies the ordering requirements of FEAT_ETS2/3 between descriptor updates and MMU faults.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
2a359e072596fcb2e9e85017a865e3618a2fe5b5 to < ea7a76d7d614b5f82b4d0785f9af3550e860a71aaffected2a359e072596fcb2e9e85017a865e3618a2fe5b5 to < 0a5dd8cf4d58ea28da132c2097cd1c525302ac48affected2a359e072596fcb2e9e85017a865e3618a2fe5b5 to < bb645aa0a4caeaf7f9cd32e9a948594d434c1a8faffected
Linux Linux
Default version status: affected
6.16affected0 to < 6.16unaffected6.18.40 to ≤ 6.18.*unaffected7.1.5 to ≤ 7.1.*unaffected7.2 to ≤ *unaffected