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.
Metrics
CVSS 3.1 9.0/10
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 57a9a117154c93539e33161dd318e6aeb8c04efa, < 1716b7fea2ead941a0dfac06c4504a3437cdf00d; >= 57a9a117154c93539e33161dd318e6aeb8c04efa, < dab9f93251b2c86a033de6098d0c73afddd55d4a; >= 57a9a117154c93539e33161dd318e6aeb8c04efa, < b94538186a3eae3763b8f96dacd610920a865aa7; >= 57a9a117154c93539e33161dd318e6aeb8c04efa, < 0680f511926589206f81f57f76ce131d7741a316; >= 57a9a117154c93539e33161dd318e6aeb8c04efa, < 8bcd15b690a390241179516af1b6ae49ebfd9d95; >= 57a9a117154c93539e33161dd318e6aeb8c04efa, < 9ce754ed8e7ab4e3999767ce1505f85c449ccb07 |
| Linux | Linux | 4.12 |
References
- https://git.kernel.org/stable/c/0680f511926589206f81f57f76ce131d7741a316Patch
- https://git.kernel.org/stable/c/1716b7fea2ead941a0dfac06c4504a3437cdf00dPatch
- https://git.kernel.org/stable/c/8bcd15b690a390241179516af1b6ae49ebfd9d95Patch
- https://git.kernel.org/stable/c/9ce754ed8e7ab4e3999767ce1505f85c449ccb07Patch
- https://git.kernel.org/stable/c/b94538186a3eae3763b8f96dacd610920a865aa7Patch
- https://git.kernel.org/stable/c/dab9f93251b2c86a033de6098d0c73afddd55d4aPatch
Timeline
- Published
- Jul 19, 2026
- Last modified
- Oct 19, 2026
- NVD status
- Modified