{"id":"CVE-2026-64287","revision":"bc6ead39104b464ead4451885fc22d67","records":[{"revision":"bc6ead39104b464ead4451885fc22d67","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-64287","aliases":[],"title":"KVM: arm64: Bound used_lrs when flushing the pKVM hyp vCPU","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: Bound used_lrs when flushing the pKVM hyp vCPU\n\nflush_hyp_vcpu() copies the host vGIC state into the hyp's private vCPU\non every run. The vGIC list register save and restore use used_lrs as\ntheir loop bound and expect it to stay within the number of implemented\nlist registers. While this is generally the case, flush_hyp_vcpu()\ncopies vgic_v3 verbatim and does not enforce this, so a value provided\nby the host is used at EL2 to index vgic_lr[] and access ICH_LR<n>_EL2\n(host -> EL2).\n\nFix by clamping used_lrs to the number of implemented list registers\nafter the copy, as the trusted path already does in\nvgic_flush_lr_state(). The number of implemented list registers is\nconstant after init, so it is replicated once from\nkvm_vgic_global_state.nr_lr into hyp_gicv3_nr_lr rather than read on\nevery entry.","state":0,"publishedAt":"2026-07-25T08:49:28.168+00:00","modifiedAt":"2026-10-19T20:38:22.088+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"arch/arm64/include/asm/kvm_hyp.h\",\n                        \"arch/arm64/kvm/arm.c\",\n                        \"arch/arm64/kvm/hyp/nvhe/hyp-main.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"be66e67f175096f283c9d5614c4991fc9e7ed975\",\n                            \"lessThan\": \"2c5e72b9fbf83fdfa724e9f1af0f418ccf8739b8\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"be66e67f175096f283c9d5614c4991fc9e7ed975\",\n                            \"lessThan\": \"9fa301d8298778dd799fa4dcf7a7f440715d146e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"be66e67f175096f283c9d5614c4991fc9e7ed975\",\n                            \"lessThan\": \"c646431865f4b1a5b14067233fa27b11e05e0d46\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"be66e67f175096f283c9d5614c4991fc9e7ed975\",\n                            \"lessThan\": \"7fca3fcef81c713bc82a37bf741e0f28e6d04a6f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"be66e67f175096f283c9d5614c4991fc9e7ed975\",\n                            \"lessThan\": \"8cc8bbbfab14c22c5551d0dd19b208a44b141c76\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"arch/arm64/include/asm/kvm_hyp.h\",\n                        \"arch/arm64/kvm/arm.c\",\n                        \"arch/arm64/kvm/hyp/nvhe/hyp-main.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.2\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.2\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.145\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.97\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.40\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.4\",\n                            \"lessThanOrEqual\": \"7.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H","score":8.2,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/2c5e72b9fbf83fdfa724e9f1af0f418ccf8739b8","https://git.kernel.org/stable/c/9fa301d8298778dd799fa4dcf7a7f440715d146e","https://git.kernel.org/stable/c/c646431865f4b1a5b14067233fa27b11e05e0d46","https://git.kernel.org/stable/c/7fca3fcef81c713bc82a37bf741e0f28e6d04a6f","https://git.kernel.org/stable/c/8cc8bbbfab14c22c5551d0dd19b208a44b141c76"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-64287","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-64287","identifiers":["CVE-2026-64287"]},"retained":false,"historicalAffected":[]}],"coverage":[]}