CVE-2026-64106KVM: arm64: vgic-its: Reject restored DTE with out-of-range num_eventid_bits
Updated under an hour ago ()
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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.
- CVSS
- 9.0 CRITICAL (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/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
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 57a9a117154c93539e33161dd318e6aeb8c04efa before 1716b7fea2ead941a0dfac06c4504a3437cdf00d; from 57a9a117154c93539e33161dd318e6aeb8c04efa before dab9f93251b2c86a033de6098d0c73afddd55d4a; from 57a9a117154c93539e33161dd318e6aeb8c04efa before b94538186a3eae3763b8f96dacd610920a865aa7; from 57a9a117154c93539e33161dd318e6aeb8c04efa before 0680f511926589206f81f57f76ce131d7741a316; 57a9a117154c93539e33161dd318e6aeb8c04efa builds before 8bcd15b690a390241179516af1b6ae49ebfd9d95; 57a9a117154c93539e33161dd318e6aeb8c04efa builds before 9ce754ed8e7ab4e3999767ce1505f85c449ccb07 | CNA record |
linux linux_kernel linux:linux_kernel | from 4.12 before 6.1.175; from 6.2 before 6.6.142; from 6.7 before 6.12.92; from 6.13 before 6.18.34; from 6.19 before 7.0.11; 7.1; 7.1; 7.1; and 1 more ranges | NVD |
References
- https://git.kernel.org/stable/c/1716b7fea2ead941a0dfac06c4504a3437cdf00dpatch
- https://git.kernel.org/stable/c/dab9f93251b2c86a033de6098d0c73afddd55d4apatch
- https://git.kernel.org/stable/c/b94538186a3eae3763b8f96dacd610920a865aa7patch
- https://git.kernel.org/stable/c/0680f511926589206f81f57f76ce131d7741a316patch
- https://git.kernel.org/stable/c/8bcd15b690a390241179516af1b6ae49ebfd9d95patch
- https://git.kernel.org/stable/c/9ce754ed8e7ab4e3999767ce1505f85c449ccb07patch
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.