Riskcovery

CVE-2026-72278

KVM: arm64: nv: Re-translate VNCR before injecting abort

State
Published
Severity
9.3 Critical
Published
Aug 15, 2026
Updated
Aug 17, 2026
Reserved
Aug 9, 2026

Read the record on cve.org

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.

Scores

CVSSScoreVectorSource
3.19.3 CriticalCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:HLinux

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 2a359e072596fcb2e9e85017a865e3618a2fe5b5 to before ea7a76d7d614b5f82b4d0785f9af3550e860a71aAffected
  • 2a359e072596fcb2e9e85017a865e3618a2fe5b5 to before 0a5dd8cf4d58ea28da132c2097cd1c525302ac48Affected
  • 2a359e072596fcb2e9e85017a865e3618a2fe5b5 to before bb645aa0a4caeaf7f9cd32e9a948594d434c1a8fAffected
LinuxLinux
  • 6.16Affected
  • before 6.16Not affected
  • 6.18.40 through 6.18.*Not affected
  • 7.1.5 through 7.1.*Not affected
  • 7.2 and laterNot affected

References

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