{"id":"CVE-2025-40022","revision":"a4a4de5cfe8041b093f752392f9f823d","records":[{"revision":"a4a4de5cfe8041b093f752392f9f823d","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2025-40022","aliases":[],"title":"crypto: af_alg - Fix incorrect boolean values in af_alg_ctx","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: af_alg - Fix incorrect boolean values in af_alg_ctx\n\nCommit 1b34cbbf4f01 (\"crypto: af_alg - Disallow concurrent writes in\naf_alg_sendmsg\") changed some fields from bool to 1-bit bitfields of\ntype u32.\n\nHowever, some assignments to these fields, specifically 'more' and\n'merge', assign values greater than 1.  These relied on C's implicit\nconversion to bool, such that zero becomes false and nonzero becomes\ntrue.\n\nWith a 1-bit bitfields of type u32 instead, mod 2 of the value is taken\ninstead, resulting in 0 being assigned in some cases when 1 was intended.\n\nFix this by restoring the bool type.","state":0,"publishedAt":"2025-10-24T12:24:57.875+00:00","modifiedAt":"2026-10-15T01:08:50.599+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                        \"include/crypto/if_alg.h\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"0f28c4adbc4a97437874c9b669fd7958a8c6d6ce\",\n                            \"lessThan\": \"3a21698ace915a445bce2d0dcfc84b6d2199baf7\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"e4c1ec11132ec466f7362a95f36a506ce4dc08c9\",\n                            \"lessThan\": \"d382d6daf0184490f366562469a5673f65ee2662\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1f323a48e9b5ebfe6dc7d130fdf5c3c0e92a07c8\",\n                            \"lessThan\": \"54506c6335690f4ef1b9f154e34f5a604c72c1ed\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"7c4491b5644e3a3708f3dbd7591be0a570135b84\",\n                            \"lessThan\": \"8703940bd30b5ad94408d28d7192db2491cd3592\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"9aee87da5572b3a14075f501752e209801160d3d\",\n                            \"lessThan\": \"316b090c2fee964c307a634fecc7df269664b158\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"45bcf60fe49b37daab1acee57b27211ad1574042\",\n                            \"lessThan\": \"fbe96bd25423e61273d8831e995260b429d850b6\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"1b34cbbf4f011a121ef7b2d7d6e6920a036d5285\",\n                            \"lessThan\": \"d0ca0df179c4b21e2a6c4a4fb637aa8fa14575cb\",\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\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"include/crypto/if_alg.h\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.1.154\",\n                            \"lessThan\": \"6.1.155\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.108\",\n                            \"lessThan\": \"6.6.109\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.49\",\n                            \"lessThan\": \"6.12.50\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.16.9\",\n                            \"lessThan\": \"6.16.10\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/3a21698ace915a445bce2d0dcfc84b6d2199baf7","https://git.kernel.org/stable/c/d382d6daf0184490f366562469a5673f65ee2662","https://git.kernel.org/stable/c/54506c6335690f4ef1b9f154e34f5a604c72c1ed","https://git.kernel.org/stable/c/8703940bd30b5ad94408d28d7192db2491cd3592","https://git.kernel.org/stable/c/316b090c2fee964c307a634fecc7df269664b158","https://git.kernel.org/stable/c/fbe96bd25423e61273d8831e995260b429d850b6","https://git.kernel.org/stable/c/d0ca0df179c4b21e2a6c4a4fb637aa8fa14575cb"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-40022","license":"CVE Program Terms of Use","key":"cve-program:CVE-2025-40022","identifiers":["CVE-2025-40022"]},"retained":false,"historicalAffected":[]}],"coverage":[]}