{"api_version":"1","generated_at":"2026-05-09T12:06:04+00:00","cve":"CVE-2026-43366","urls":{"html":"https://cve.report/CVE-2026-43366","api":"https://cve.report/api/cve/CVE-2026-43366.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-43366","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-43366"},"summary":{"title":"io_uring/kbuf: check if target buffer list is still legacy on recycle","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/kbuf: check if target buffer list is still legacy on recycle\n\nThere's a gap between when the buffer was grabbed and when it\npotentially gets recycled, where if the list is empty, someone could've\nupgraded it to a ring provided type. This can happen if the request\nis forced via io-wq. The legacy recycling is missing checking if the\nbuffer_list still exists, and if it's of the correct type. Add those\nchecks.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-05-08 15:16:47","updated_at":"2026-05-08 15:16:47"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/50ad880db3013c6fee0ef13781762a39e2e7ef83","name":"https://git.kernel.org/stable/c/50ad880db3013c6fee0ef13781762a39e2e7ef83","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/97b57f69fee1b61b41acbf37e7720cac9d389fa4","name":"https://git.kernel.org/stable/c/97b57f69fee1b61b41acbf37e7720cac9d389fa4","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f3fb54e7a8b4aadcc2836ee463eec8c88709b8aa","name":"https://git.kernel.org/stable/c/f3fb54e7a8b4aadcc2836ee463eec8c88709b8aa","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/439a6728ec4641ffad1ca796622c19bc525e570f","name":"https://git.kernel.org/stable/c/439a6728ec4641ffad1ca796622c19bc525e570f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c2c185be5c85d37215397c8e8781abf0a69bec1f","name":"https://git.kernel.org/stable/c/c2c185be5c85d37215397c8e8781abf0a69bec1f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a7b33671e418fca507feebd1d56e7f4952a4b25c","name":"https://git.kernel.org/stable/c/a7b33671e418fca507feebd1d56e7f4952a4b25c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-43366","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-43366","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c7fb19428d67dd0a2a78a4f237af01d39c78dc5a a7b33671e418fca507feebd1d56e7f4952a4b25c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c7fb19428d67dd0a2a78a4f237af01d39c78dc5a 439a6728ec4641ffad1ca796622c19bc525e570f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c7fb19428d67dd0a2a78a4f237af01d39c78dc5a f3fb54e7a8b4aadcc2836ee463eec8c88709b8aa git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c7fb19428d67dd0a2a78a4f237af01d39c78dc5a 50ad880db3013c6fee0ef13781762a39e2e7ef83 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/kbuf: check if target buffer list is still legacy on recycle\n\nThere's a gap between when the buffer was grabbed and when it\npotentially gets recycled, where if the list is empty, someone could've\nupgraded it to a ring provided type. This can happen if the request\nis forced via io-wq. The legacy recycling is missing checking if the\nbuffer_list still exists, and if it's of the correct type. Add those\nchecks."}],"providerMetadata":{"dateUpdated":"2026-05-08T14:21:19.191Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/a7b33671e418fca507feebd1d56e7f4952a4b25c"},{"url":"https://git.kernel.org/stable/c/439a6728ec4641ffad1ca796622c19bc525e570f"},{"url":"https://git.kernel.org/stable/c/f3fb54e7a8b4aadcc2836ee463eec8c88709b8aa"},{"url":"https://git.kernel.org/stable/c/50ad880db3013c6fee0ef13781762a39e2e7ef83"},{"url":"https://git.kernel.org/stable/c/97b57f69fee1b61b41acbf37e7720cac9d389fa4"},{"url":"https://git.kernel.org/stable/c/c2c185be5c85d37215397c8e8781abf0a69bec1f"}],"title":"io_uring/kbuf: check if target buffer list is still legacy on recycle","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-43366","datePublished":"2026-05-08T14:21:19.191Z","dateReserved":"2026-05-01T14:12:56.005Z","dateUpdated":"2026-05-08T14:21:19.191Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-05-08 15:16:47","lastModifiedDate":"2026-05-08 15:16:47","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"43366","Ordinal":"1","Title":"io_uring/kbuf: check if target buffer list is still legacy on re","CVE":"CVE-2026-43366","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"43366","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/kbuf: check if target buffer list is still legacy on recycle\n\nThere's a gap between when the buffer was grabbed and when it\npotentially gets recycled, where if the list is empty, someone could've\nupgraded it to a ring provided type. This can happen if the request\nis forced via io-wq. The legacy recycling is missing checking if the\nbuffer_list still exists, and if it's of the correct type. Add those\nchecks.","Type":"Description","Title":"io_uring/kbuf: check if target buffer list is still legacy on re"}]}}}