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.
| Version | Score | Severity | Vector String |
|---|---|---|---|
| 3.1 | 9 | Critical | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:H |
| Product | Vendor | Version |
|---|---|---|
| Linux | Linux | < SMR Sep-2022 Release 1 |
| Linux | Linux | n/a |
| Linux | Linux | 4.3 |
| Linux | Linux | < 8.0 |