KVM: arm64: vgic-its: Reject restored DTE with out-of-range num_eventid_bits
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.
CVE-2026-64106
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-64106
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "57a9a117154c93539e33161dd318e6aeb8c04efa",
"lessThan": "1716b7fea2ead941a0dfac06c4504a3437cdf00d",
"versionType": "git"
},
{
"status": "affected",
"version": "57a9a117154c93539e33161dd318e6aeb8c04efa",
"lessThan": "dab9f93251b2c86a033de6098d0c73afddd55d4a",
"versionType": "git"
},
{
"status": "affected",
"version": "57a9a117154c93539e33161dd318e6aeb8c04efa",
"lessThan": "b94538186a3eae3763b8f96dacd610920a865aa7",
"versionType": "git"
},
{
"status": "affected",
"version": "57a9a117154c93539e33161dd318e6aeb8c04efa",
"lessThan": "0680f511926589206f81f57f76ce131d7741a316",
"versionType": "git"
},
{
"status": "affected",
"version": "57a9a117154c93539e33161dd318e6aeb8c04efa",
"lessThan": "8bcd15b690a390241179516af1b6ae49ebfd9d95",
"versionType": "git"
},
{
"status": "affected",
"version": "57a9a117154c93539e33161dd318e6aeb8c04efa",
"lessThan": "9ce754ed8e7ab4e3999767ce1505f85c449ccb07",
"versionType": "git"
}
],
"programFiles": [
"arch/arm64/kvm/vgic/vgic-its.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.12"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.12",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.175",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.142",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.92",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.34",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.0.11",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"arch/arm64/kvm/vgic/vgic-its.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-64106
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #40953 · Revision 1
- Added to Heist Feed
- Publisher date