VULNERABILITY INTELLIGENCE
CVE-2026-64106
CVSS score9 CRITICAL
EPSS probability0.15%
CISA KEVNot currently listed
Published2026-07-19
Last modified2026-10-19
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:H
Description
In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: vgic-its: Reject restored DTE with out-of-range num_eventid_bits Userspace can restore an ITS Device Table Entry whose Size field encodes more EventID bits than the virtual ITS supports. The live MAPD path rejects that state, but vgic_its_restore_dte() accepts it and stores the out-of-range value in dev->num_eventid_bits. Reject restored DTEs with num_eventid_bits > VITS_TYPER_IDBITS before allocating the device. This mirrors the MAPD check and prevents the restored state from reaching vgic_its_restore_itt(), where the unchecked value can be converted into an oversized scan_its_table() range.
Weakness classification
- nvd@nist.gov: NVD-CWE-noinfo
- 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-20