CVE-2026-64288KVM: arm64: nv: Avoid dereferencing NULL VNCR pseudo-TLB
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Analyzed
- Record last updated
- Aug 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 4ffa72ad8f37e73bbb6c0baa88557bcb4fd39929 before 7c73a269a880b1399baacfb9d521415e6ef7ecc2; from 4ffa72ad8f37e73bbb6c0baa88557bcb4fd39929 before 5fd30133af864a1de0a0bd87d3fe3cf23205fbc7; 4ffa72ad8f37e73bbb6c0baa88557bcb4fd39929 builds before 4be6cbeb93d26994bd1827ddbce391e3c4395c8f | CNA record |
linux linux_kernel linux:linux_kernel | from 6.16 before 6.18.39; from 6.19 before 7.1.4 | NVD |
References
- https://git.kernel.org/stable/c/7c73a269a880b1399baacfb9d521415e6ef7ecc2patch
- https://git.kernel.org/stable/c/5fd30133af864a1de0a0bd87d3fe3cf23205fbc7patch
- https://git.kernel.org/stable/c/4be6cbeb93d26994bd1827ddbce391e3c4395c8fpatch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.