{"id":"CVE-2026-43366","revision":"22c0f06415f84db7846afdf3be0e107b","records":[{"revision":"22c0f06415f84db7846afdf3be0e107b","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-43366","aliases":[],"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":0,"publishedAt":"2026-05-08T14:21:19.191+00:00","modifiedAt":"2026-10-19T19:16:27.613+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                        \"io_uring/kbuf.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"c7fb19428d67dd0a2a78a4f237af01d39c78dc5a\",\n                            \"lessThan\": \"a7b33671e418fca507feebd1d56e7f4952a4b25c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c7fb19428d67dd0a2a78a4f237af01d39c78dc5a\",\n                            \"lessThan\": \"439a6728ec4641ffad1ca796622c19bc525e570f\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c7fb19428d67dd0a2a78a4f237af01d39c78dc5a\",\n                            \"lessThan\": \"f3fb54e7a8b4aadcc2836ee463eec8c88709b8aa\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c7fb19428d67dd0a2a78a4f237af01d39c78dc5a\",\n                            \"lessThan\": \"50ad880db3013c6fee0ef13781762a39e2e7ef83\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c7fb19428d67dd0a2a78a4f237af01d39c78dc5a\",\n                            \"lessThan\": \"97b57f69fee1b61b41acbf37e7720cac9d389fa4\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c7fb19428d67dd0a2a78a4f237af01d39c78dc5a\",\n                            \"lessThan\": \"c2c185be5c85d37215397c8e8781abf0a69bec1f\",\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                        \"io_uring/kbuf.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"5.19\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"5.19\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.167\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.130\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.78\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.19\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.19.9\",\n                            \"lessThanOrEqual\": \"6.19.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.0\",\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:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/a7b33671e418fca507feebd1d56e7f4952a4b25c","https://git.kernel.org/stable/c/439a6728ec4641ffad1ca796622c19bc525e570f","https://git.kernel.org/stable/c/f3fb54e7a8b4aadcc2836ee463eec8c88709b8aa","https://git.kernel.org/stable/c/50ad880db3013c6fee0ef13781762a39e2e7ef83","https://git.kernel.org/stable/c/97b57f69fee1b61b41acbf37e7720cac9d389fa4","https://git.kernel.org/stable/c/c2c185be5c85d37215397c8e8781abf0a69bec1f"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-43366","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-43366","identifiers":["CVE-2026-43366"]},"retained":false,"historicalAffected":[]}],"coverage":[]}