{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-64106", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T07:54:57.034Z", "datePublished": "2026-07-19T15:40:09.344Z", "dateUpdated": "2026-07-20T13:43:22.355Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-20T13:43:22.355Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: vgic-its: Reject restored DTE with out-of-range num_eventid_bits\n\nUserspace can restore an ITS Device Table Entry whose Size field encodes\nmore EventID bits than the virtual ITS supports. The live MAPD path\nrejects that state, but vgic_its_restore_dte() accepts it and stores the\nout-of-range value in dev->num_eventid_bits.\n\nReject restored DTEs with num_eventid_bits > VITS_TYPER_IDBITS before\nallocating the device. This mirrors the MAPD check and prevents the\nrestored state from reaching vgic_its_restore_itt(), where the unchecked\nvalue can be converted into an oversized scan_its_table() range."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:H", "baseScore": 9, "baseSeverity": "CRITICAL"}}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/arm64/kvm/vgic/vgic-its.c"], "versions": [{"version": "57a9a117154c93539e33161dd318e6aeb8c04efa", "lessThan": "1716b7fea2ead941a0dfac06c4504a3437cdf00d", "status": "affected", "versionType": "git"}, {"version": "57a9a117154c93539e33161dd318e6aeb8c04efa", "lessThan": "dab9f93251b2c86a033de6098d0c73afddd55d4a", "status": "affected", "versionType": "git"}, {"version": "57a9a117154c93539e33161dd318e6aeb8c04efa", "lessThan": "b94538186a3eae3763b8f96dacd610920a865aa7", "status": "affected", "versionType": "git"}, {"version": "57a9a117154c93539e33161dd318e6aeb8c04efa", "lessThan": "0680f511926589206f81f57f76ce131d7741a316", "status": "affected", "versionType": "git"}, {"version": "57a9a117154c93539e33161dd318e6aeb8c04efa", "lessThan": "8bcd15b690a390241179516af1b6ae49ebfd9d95", "status": "affected", "versionType": "git"}, {"version": "57a9a117154c93539e33161dd318e6aeb8c04efa", "lessThan": "9ce754ed8e7ab4e3999767ce1505f85c449ccb07", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["arch/arm64/kvm/vgic/vgic-its.c"], "versions": [{"version": "4.12", "status": "affected"}, {"version": "0", "lessThan": "4.12", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.175", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.142", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.92", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.34", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.11", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.1.175"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.6.142"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.12.92"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "6.18.34"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "7.0.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.12", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/1716b7fea2ead941a0dfac06c4504a3437cdf00d"}, {"url": "https://git.kernel.org/stable/c/dab9f93251b2c86a033de6098d0c73afddd55d4a"}, {"url": "https://git.kernel.org/stable/c/b94538186a3eae3763b8f96dacd610920a865aa7"}, {"url": "https://git.kernel.org/stable/c/0680f511926589206f81f57f76ce131d7741a316"}, {"url": "https://git.kernel.org/stable/c/8bcd15b690a390241179516af1b6ae49ebfd9d95"}, {"url": "https://git.kernel.org/stable/c/9ce754ed8e7ab4e3999767ce1505f85c449ccb07"}], "title": "KVM: arm64: vgic-its: Reject restored DTE with out-of-range num_eventid_bits", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{}

{"bugzilla": {"description": "kernel: KVM: arm64: vgic-its: Reject restored DTE with out-of-range num_eventid_bits", "id": "2502606", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502606"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-805", "details": ["A flaw was found in the Linux kernel's Kernel-based Virtual Machine (KVM) for arm64 architecture, specifically within the virtual Generic Interrupt Controller (vgic-its) module. A local user in userspace can restore an Interrupt Translation Service (ITS) Device Table Entry (DTE) with a size field that specifies more EventID bits than the virtual ITS supports. This unchecked value can lead to an oversized scan of the ITS table, potentially causing system instability or a denial of service."], "name": "CVE-2026-64106", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-07-19T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-64106\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64106\nhttps://lore.kernel.org/linux-cve-announce/2026071921-CVE-2026-64106-767b@gregkh/T"], "threat_severity": "Moderate"}

{}