KVM: arm64: vgic-its: Don't dereference a NULL collection on ITT save
In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: vgic-its: Don't dereference a NULL collection on ITT save MAPC with V=0 drops ite->collection but leaves the ITE on the device's ITT list, and vgic_its_save_ite() dereferences it unconditionally. A guest that issues MAPD, MAPTI and then MAPC(V=0) therefore oopses the host when the VMM issues KVM_DEV_ARM_ITS_SAVE_TABLES to migrate it. That sequence is UNPREDICTABLE per the architecture, but KVM already handles the resulting state in the translate, MOVI and DISCARD paths. Save a zeroed entry, which vgic_its_restore_ite() reads back as invalid. Skipping the ITE instead would leave the ITT slot holding whatever is in guest memory, and restore rejects an entry naming a collection the restored collection table does not have.
CVE-2026-89912
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-2026-89912
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": "eff484e0298da5a4d18ca82f5454c557fd942af5",
"lessThan": "dd0c3e6c03e3bb3fd7c0fa422230020674c5c25e",
"versionType": "git"
},
{
"status": "affected",
"version": "eff484e0298da5a4d18ca82f5454c557fd942af5",
"lessThan": "2c3a87ad3d3935c43d465cd2465db9020f9e898f",
"versionType": "git"
},
{
"status": "affected",
"version": "eff484e0298da5a4d18ca82f5454c557fd942af5",
"lessThan": "3d4c26b16a04a084fe0bde08ccdd8086570f8bbe",
"versionType": "git"
},
{
"status": "affected",
"version": "eff484e0298da5a4d18ca82f5454c557fd942af5",
"lessThan": "36df368861d2664291298feeb37dfef43fcae670",
"versionType": "git"
},
{
"status": "affected",
"version": "eff484e0298da5a4d18ca82f5454c557fd942af5",
"lessThan": "c6c156d931c33b92362383cf76f6d6e1291dcbfe",
"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": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.113",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.51",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.5",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"arch/arm64/kvm/vgic/vgic-its.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-89912
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #48564 · Revision 1
- Added to Heist Feed
- Publisher date