{"id":"CVE-2026-64106","summary":"KVM: arm64: vgic-its: Reject restored DTE with out-of-range num_eventid_bits","details":"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-\u003enum_eventid_bits.\n\nReject restored DTEs with num_eventid_bits \u003e 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.","modified":"2026-07-22T05:29:58.610575759Z","published":"2026-07-19T15:40:09.344Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64106.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0680f511926589206f81f57f76ce131d7741a316"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1716b7fea2ead941a0dfac06c4504a3437cdf00d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8bcd15b690a390241179516af1b6ae49ebfd9d95"},{"type":"WEB","url":"https://git.kernel.org/stable/c/9ce754ed8e7ab4e3999767ce1505f85c449ccb07"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b94538186a3eae3763b8f96dacd610920a865aa7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/dab9f93251b2c86a033de6098d0c73afddd55d4a"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/64xxx/CVE-2026-64106.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64106"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"57a9a117154c93539e33161dd318e6aeb8c04efa"},{"fixed":"1716b7fea2ead941a0dfac06c4504a3437cdf00d"},{"fixed":"dab9f93251b2c86a033de6098d0c73afddd55d4a"},{"fixed":"b94538186a3eae3763b8f96dacd610920a865aa7"},{"fixed":"0680f511926589206f81f57f76ce131d7741a316"},{"fixed":"8bcd15b690a390241179516af1b6ae49ebfd9d95"},{"fixed":"9ce754ed8e7ab4e3999767ce1505f85c449ccb07"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64106.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.12.0"},{"fixed":"6.1.175"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.142"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.92"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.34"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.0.11"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-64106.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:H"}]}