{"api_version":"1","generated_at":"2026-06-14T18:36:56+00:00","cve":"CVE-2026-46316","urls":{"html":"https://cve.report/CVE-2026-46316","api":"https://cve.report/api/cve/CVE-2026-46316.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-46316","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-46316"},"summary":{"title":"KVM: arm64: vgic-its: Drop the translation cache reference only for the erased entry","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: vgic-its: Drop the translation cache reference only for the erased entry\n\nvgic_its_invalidate_cache() walks the per-ITS translation cache with\nxa_for_each() and drops the cache's reference on each entry with\nvgic_put_irq(). It puts the iterated pointer, though, rather than the\nvalue returned by xa_erase().\n\nThe function is called from contexts that do not exclude one another: the\nITS command handlers hold its_lock, the GITS_CTLR write path holds\ncmd_lock, and the path that clears EnableLPIs in a redistributor's\nGICR_CTLR holds neither. Two or more of them can drain the same cache\nconcurrently, and if each one observes the same entry, erases it and then\nputs it, the single reference the cache holds on that entry is dropped\nmore than once. The entry can then be freed while an ITE still maps it.\n\nxa_erase() is atomic and returns the previous entry, so put only the entry\nthat this context actually removed. The cache reference is then dropped\nexactly once per entry even when the invalidations run concurrently, and\nthe behavior is unchanged when only one context runs.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-06-09 13:16:36","updated_at":"2026-06-14 06:16:24"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"9.3","severity":"CRITICAL","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","baseScore":9.3,"baseSeverity":"CRITICAL","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"9.3","severity":"CRITICAL","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","data":{"baseScore":9.3,"baseSeverity":"CRITICAL","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/9121f4605ab94969f62d1b5714ca3c6c69bd202f","name":"https://git.kernel.org/stable/c/9121f4605ab94969f62d1b5714ca3c6c69bd202f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2bbc395e81bd29c543a0529a678327e932a7ec69","name":"https://git.kernel.org/stable/c/2bbc395e81bd29c543a0529a678327e932a7ec69","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/13031fb6b8357fbbcded2a7f4cba73e4781ee594","name":"https://git.kernel.org/stable/c/13031fb6b8357fbbcded2a7f4cba73e4781ee594","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b7b72e88046328c9fdc638fe887d4240257dd5dc","name":"https://git.kernel.org/stable/c/b7b72e88046328c9fdc638fe887d4240257dd5dc","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-46316","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-46316","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8201d1028caa4fae88e222c4e8cf541fdf45b821 b7b72e88046328c9fdc638fe887d4240257dd5dc git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8201d1028caa4fae88e222c4e8cf541fdf45b821 2bbc395e81bd29c543a0529a678327e932a7ec69 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8201d1028caa4fae88e222c4e8cf541fdf45b821 9121f4605ab94969f62d1b5714ca3c6c69bd202f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 8201d1028caa4fae88e222c4e8cf541fdf45b821 13031fb6b8357fbbcded2a7f4cba73e4781ee594 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: vgic-its: Drop the translation cache reference only for the erased entry\n\nvgic_its_invalidate_cache() walks the per-ITS translation cache with\nxa_for_each() and drops the cache's reference on each entry with\nvgic_put_irq(). It puts the iterated pointer, though, rather than the\nvalue returned by xa_erase().\n\nThe function is called from contexts that do not exclude one another: the\nITS command handlers hold its_lock, the GITS_CTLR write path holds\ncmd_lock, and the path that clears EnableLPIs in a redistributor's\nGICR_CTLR holds neither. Two or more of them can drain the same cache\nconcurrently, and if each one observes the same entry, erases it and then\nputs it, the single reference the cache holds on that entry is dropped\nmore than once. The entry can then be freed while an ITE still maps it.\n\nxa_erase() is atomic and returns the previous entry, so put only the entry\nthat this context actually removed. The cache reference is then dropped\nexactly once per entry even when the invalidations run concurrently, and\nthe behavior is unchanged when only one context runs."}],"metrics":[{"cvssV3_1":{"baseScore":9.3,"baseSeverity":"CRITICAL","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","version":"3.1"}}],"providerMetadata":{"dateUpdated":"2026-06-14T04:30:10.361Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/b7b72e88046328c9fdc638fe887d4240257dd5dc"},{"url":"https://git.kernel.org/stable/c/2bbc395e81bd29c543a0529a678327e932a7ec69"},{"url":"https://git.kernel.org/stable/c/9121f4605ab94969f62d1b5714ca3c6c69bd202f"},{"url":"https://git.kernel.org/stable/c/13031fb6b8357fbbcded2a7f4cba73e4781ee594"}],"title":"KVM: arm64: vgic-its: Drop the translation cache reference only for the erased entry","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-46316","datePublished":"2026-06-09T11:52:29.349Z","dateReserved":"2026-05-13T15:03:33.112Z","dateUpdated":"2026-06-14T04:30:10.361Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-06-09 13:16:36","lastModifiedDate":"2026-06-14 06:16:24","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","baseScore":9.3,"baseSeverity":"CRITICAL","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":2.5,"impactScore":6}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"46316","Ordinal":"1","Title":"KVM: arm64: vgic-its: Drop the translation cache reference only ","CVE":"CVE-2026-46316","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"46316","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: vgic-its: Drop the translation cache reference only for the erased entry\n\nvgic_its_invalidate_cache() walks the per-ITS translation cache with\nxa_for_each() and drops the cache's reference on each entry with\nvgic_put_irq(). It puts the iterated pointer, though, rather than the\nvalue returned by xa_erase().\n\nThe function is called from contexts that do not exclude one another: the\nITS command handlers hold its_lock, the GITS_CTLR write path holds\ncmd_lock, and the path that clears EnableLPIs in a redistributor's\nGICR_CTLR holds neither. Two or more of them can drain the same cache\nconcurrently, and if each one observes the same entry, erases it and then\nputs it, the single reference the cache holds on that entry is dropped\nmore than once. The entry can then be freed while an ITE still maps it.\n\nxa_erase() is atomic and returns the previous entry, so put only the entry\nthat this context actually removed. The cache reference is then dropped\nexactly once per entry even when the invalidations run concurrently, and\nthe behavior is unchanged when only one context runs.","Type":"Description","Title":"KVM: arm64: vgic-its: Drop the translation cache reference only "}]}}}