{"id":"CVE-2026-89913","revision":"4220e36de06f4ee8b12b96d365f79a59","records":[{"revision":"4220e36de06f4ee8b12b96d365f79a59","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-89913","aliases":[],"title":"KVM: arm64: vgic-v3: take an LPI reference in vgic_v3_save_pending_tables","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: vgic-v3: take an LPI reference in vgic_v3_save_pending_tables\n\nvgic_v3_save_pending_tables() iterates dist->lpi_xa using xa_for_each()\nand dereferences the returned struct vgic_irq in the loop body without\nholding a reference on the LPI.\n\nThe xarray iterator only provides temporary RCU coverage while looking up\nthe current entry. That is not sufficient for this loop body, which reads\nfields from struct vgic_irq and performs guest memory accesses before the\niteration completes.\n\nA concurrent path can trigger this race: the irqfd cached injection path\n(vgic_its_inject_cached_translation) obtains a transient LPI reference\nvia vgic_its_check_cache() without holding kvm->lock, vcpu->mutex,\nconfig_lock, or its_lock. If guest ITS DISCARD then drops the cache and\nITE references under its_lock, the transient inject reference may become\nthe final one. When vgic_put_irq() drops it, the LPI is erased from\nlpi_xa and freed via kfree_rcu(). Meanwhile, vgic_v3_save_pending_tables()\nmay still hold a stale pointer obtained from the xarray iterator and\ndereference it after the RCU grace period completes.\n\nFix this by re-fetching each iterated LPI via vgic_get_irq(), which takes\na stable reference, and dropping it with vgic_put_irq() on all paths.\nThis matches the pattern already used by other lpi_xa iterators in the\nvgic ITS code.","state":0,"publishedAt":"2026-09-16T10:32:09.947+00:00","modifiedAt":"2026-10-21T12:49:08.468+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/kvm/vgic/vgic-v3.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"280771252c1bae0947215c59fb9ea6a8d9f8399d\",\n                            \"lessThan\": \"4000462866bc71f16d1bfb3cf8e969f95150cd64\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"280771252c1bae0947215c59fb9ea6a8d9f8399d\",\n                            \"lessThan\": \"7631f95297560157d3a9283cb999e3be00103348\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"280771252c1bae0947215c59fb9ea6a8d9f8399d\",\n                            \"lessThan\": \"d3a2d20b7248ea67465af1cf79c79f90ff70926c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"280771252c1bae0947215c59fb9ea6a8d9f8399d\",\n                            \"lessThan\": \"f5b8f203bfc07a5a257dff859e66d2c500f9f509\",\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/kvm/vgic/vgic-v3.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"4.12\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"4.12\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.114\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.51\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.5\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\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:L/UI:N/S:C/C:H/I:H/A:H","score":8.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/4000462866bc71f16d1bfb3cf8e969f95150cd64","https://git.kernel.org/stable/c/7631f95297560157d3a9283cb999e3be00103348","https://git.kernel.org/stable/c/d3a2d20b7248ea67465af1cf79c79f90ff70926c","https://git.kernel.org/stable/c/f5b8f203bfc07a5a257dff859e66d2c500f9f509"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89913","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-89913","identifiers":["CVE-2026-89913"]},"retained":false,"historicalAffected":[]}],"coverage":[]}