CVE-2025-40022

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-40022", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T07:20:57.152Z", "datePublished": "2025-10-24T12:24:57.875Z", "dateUpdated": "2026-11-10T12:37:29.922Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T21:40:58.053Z"}, "descriptions": [{"lang": "en", "value": "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."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["include/crypto/if_alg.h"], "versions": [{"version": "0f28c4adbc4a97437874c9b669fd7958a8c6d6ce", "lessThan": "3a21698ace915a445bce2d0dcfc84b6d2199baf7", "status": "affected", "versionType": "git"}, {"version": "e4c1ec11132ec466f7362a95f36a506ce4dc08c9", "lessThan": "d382d6daf0184490f366562469a5673f65ee2662", "status": "affected", "versionType": "git"}, {"version": "1f323a48e9b5ebfe6dc7d130fdf5c3c0e92a07c8", "lessThan": "54506c6335690f4ef1b9f154e34f5a604c72c1ed", "status": "affected", "versionType": "git"}, {"version": "7c4491b5644e3a3708f3dbd7591be0a570135b84", "lessThan": "8703940bd30b5ad94408d28d7192db2491cd3592", "status": "affected", "versionType": "git"}, {"version": "9aee87da5572b3a14075f501752e209801160d3d", "lessThan": "316b090c2fee964c307a634fecc7df269664b158", "status": "affected", "versionType": "git"}, {"version": "45bcf60fe49b37daab1acee57b27211ad1574042", "lessThan": "fbe96bd25423e61273d8831e995260b429d850b6", "status": "affected", "versionType": "git"}, {"version": "1b34cbbf4f011a121ef7b2d7d6e6920a036d5285", "lessThan": "d0ca0df179c4b21e2a6c4a4fb637aa8fa14575cb", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["include/crypto/if_alg.h"], "versions": [{"version": "6.1.154", "lessThan": "6.1.155", "status": "affected", "versionType": "semver"}, {"version": "6.6.108", "lessThan": "6.6.109", "status": "affected", "versionType": "semver"}, {"version": "6.12.49", "lessThan": "6.12.50", "status": "affected", "versionType": "semver"}, {"version": "6.16.9", "lessThan": "6.16.10", "status": "affected", "versionType": "semver"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1.154", "versionEndExcluding": "6.1.155"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6.108", "versionEndExcluding": "6.6.109"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12.49", "versionEndExcluding": "6.12.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.16.9", "versionEndExcluding": "6.16.10"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/3a21698ace915a445bce2d0dcfc84b6d2199baf7"}, {"url": "https://git.kernel.org/stable/c/d382d6daf0184490f366562469a5673f65ee2662"}, {"url": "https://git.kernel.org/stable/c/54506c6335690f4ef1b9f154e34f5a604c72c1ed"}, {"url": "https://git.kernel.org/stable/c/8703940bd30b5ad94408d28d7192db2491cd3592"}, {"url": "https://git.kernel.org/stable/c/316b090c2fee964c307a634fecc7df269664b158"}, {"url": "https://git.kernel.org/stable/c/fbe96bd25423e61273d8831e995260b429d850b6"}, {"url": "https://git.kernel.org/stable/c/d0ca0df179c4b21e2a6c4a4fb637aa8fa14575cb"}], "title": "crypto: af_alg - Fix incorrect boolean values in af_alg_ctx", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"x_adpType": "supplier", "providerMetadata": {"orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "shortName": "siemens-SADP", "dateUpdated": "2026-11-10T12:37:29.922Z"}, "affected": [{"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)", "versions": [{"status": "affected", "version": "V3.1.5", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)", "versions": [{"status": "affected", "version": "V3.1.6", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AB0)", "versions": [{"status": "affected", "version": "V3.1.7", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0)", "versions": [{"status": "affected", "version": "V3.1.5", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0)", "versions": [{"status": "affected", "version": "V3.1.6", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0)", "versions": [{"status": "affected", "version": "V3.1.7", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0)", "versions": [{"status": "affected", "version": "V3.1.5", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0)", "versions": [{"status": "affected", "version": "V3.1.6", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0)", "versions": [{"status": "affected", "version": "V3.1.7", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0)", "versions": [{"status": "affected", "version": "V3.1.5", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0)", "versions": [{"status": "affected", "version": "V3.1.6", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0)", "versions": [{"status": "affected", "version": "V3.1.7", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)", "versions": [{"status": "affected", "version": "V3.1.5", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)", "versions": [{"status": "affected", "version": "V3.1.6", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}, {"vendor": "Siemens", "product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)", "versions": [{"status": "affected", "version": "V3.1.7", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}], "references": [{"url": "https://cert-portal.siemens.com/productcert/html/ssa-082556.html"}, {"url": "https://cert-portal.siemens.com/productcert/html/ssa-019113.html"}, {"url": "https://cert-portal.siemens.com/productcert/html/ssa-457936.html"}]}]}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["include/crypto/if_alg.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "3a21698ace915a445bce2d0dcfc84b6d2199baf7", "status": "affected", "version": "0f28c4adbc4a97437874c9b669fd7958a8c6d6ce", "versionType": "git"}, {"lessThan": "d382d6daf0184490f366562469a5673f65ee2662", "status": "affected", "version": "e4c1ec11132ec466f7362a95f36a506ce4dc08c9", "versionType": "git"}, {"lessThan": "54506c6335690f4ef1b9f154e34f5a604c72c1ed", "status": "affected", "version": "1f323a48e9b5ebfe6dc7d130fdf5c3c0e92a07c8", "versionType": "git"}, {"lessThan": "8703940bd30b5ad94408d28d7192db2491cd3592", "status": "affected", "version": "7c4491b5644e3a3708f3dbd7591be0a570135b84", "versionType": "git"}, {"lessThan": "316b090c2fee964c307a634fecc7df269664b158", "status": "affected", "version": "9aee87da5572b3a14075f501752e209801160d3d", "versionType": "git"}, {"lessThan": "fbe96bd25423e61273d8831e995260b429d850b6", "status": "affected", "version": "45bcf60fe49b37daab1acee57b27211ad1574042", "versionType": "git"}, {"lessThan": "d0ca0df179c4b21e2a6c4a4fb637aa8fa14575cb", "status": "affected", "version": "1b34cbbf4f011a121ef7b2d7d6e6920a036d5285", "versionType": "git"}]}, {"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["include/crypto/if_alg.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "6.1.155", "status": "affected", "version": "6.1.154", "versionType": "semver"}, {"lessThan": "6.6.109", "status": "affected", "version": "6.6.108", "versionType": "semver"}, {"lessThan": "6.12.50", "status": "affected", "version": "6.12.49", "versionType": "semver"}, {"lessThan": "6.16.10", "status": "affected", "version": "6.16.9", "versionType": "semver"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"affectedData": 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"vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.6", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP (6ES7518-4AX00-1AC0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.7", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.5", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.6", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AB0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.7", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.5", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.6", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP (6ES7518-4FX00-1AC0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.7", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.5", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.6", "versionType": "custom"}]}, {"defaultStatus": "unknown", "product": "SIPLUS S7-1500 CPU 1518-4 PN/DP MFP (6AG1518-4AX00-4AC0)", "vendor": "Siemens", "versions": [{"lessThan": "*", "status": "affected", "version": "V3.1.7", "versionType": "custom"}]}], "source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ncrypto: af_alg - Correcci\u00f3n de valores booleanos incorrectos en af_alg_ctx\n\nEl commit 1b34cbbf4f01 ('crypto: af_alg - No permitir escrituras concurrentes en af_alg_sendmsg') cambi\u00f3 algunos campos de tipo booleano a campos de bits de 1 bit de tipo u32.\n\nSin embargo, algunas asignaciones a estos campos, espec\u00edficamente 'more' y 'merge', asignan valores mayores que 1. Estos se basaban en la conversi\u00f3n impl\u00edcita de C a booleano, de modo que cero se convierte en falso y cualquier valor distinto de cero se convierte en verdadero.\n\nEn su lugar, con campos de bits de 1 bit de tipo u32, se toma el m\u00f3dulo 2 del valor, lo que resulta en la asignaci\u00f3n de 0 en algunos casos cuando se pretend\u00eda 1.\n\nEsto se corrige restaurando el tipo booleano."}], "id": "CVE-2025-40022", "lastModified": "2026-11-10T13:17:53.940", "metrics": {}, "published": "2025-10-24T13:15:47.387", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/316b090c2fee964c307a634fecc7df269664b158"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3a21698ace915a445bce2d0dcfc84b6d2199baf7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/54506c6335690f4ef1b9f154e34f5a604c72c1ed"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8703940bd30b5ad94408d28d7192db2491cd3592"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d0ca0df179c4b21e2a6c4a4fb637aa8fa14575cb"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d382d6daf0184490f366562469a5673f65ee2662"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fbe96bd25423e61273d8831e995260b429d850b6"}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "url": "https://cert-portal.siemens.com/productcert/html/ssa-019113.html"}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "url": "https://cert-portal.siemens.com/productcert/html/ssa-082556.html"}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "url": "https://cert-portal.siemens.com/productcert/html/ssa-457936.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Deferred"}

{"bugzilla": {"description": "kernel: crypto: af_alg - Fix incorrect boolean values in af_alg_ctx", "id": "2406200", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2406200"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["No description is available for this CVE."], "name": "CVE-2025-40022", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-10-24T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-40022\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-40022\nhttps://lore.kernel.org/linux-cve-announce/2025102404-CVE-2025-40022-cf34@gregkh/T"], "threat_severity": "Moderate"}

{"created": "2025-10-27T22:13:04.970385+00:00", "updated": "2025-10-27T22:13:04.970410+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}