{"id":"CVE-2026-4428","summary":"CRL Distribution Point Scope Check Logic Error in AWS-LC","details":"A logic error in CRL distribution point validation in AWS-LC before 1.71.0 causes partitioned CRLs to be incorrectly rejected as out of scope, which allows  a revoked certificate to bypass certificate revocation checks.\n\nTo remediate this issue, users should upgrade to AWS-LC 1.71.0 or AWS-LC-FIPS-3.3.0.","aliases":["GHSA-9f94-5g5w-gf6r","RUSTSEC-2026-0042","RUSTSEC-2026-0048"],"modified":"2026-08-12T16:24:28.125230Z","published":"2026-03-19T20:37:53.851Z","database_specific":{"cna_assigner":"AMZN","cwe_ids":["CWE-299"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/4xxx/CVE-2026-4428.json"},"references":[{"type":"ADVISORY","url":"https://aws.amazon.com/security/security-bulletins/2026-010-AWS/"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/4xxx/CVE-2026-4428.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-4428"},{"type":"FIX","url":"https://github.com/aws/aws-lc/releases/tag/v1.71.0"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/aws/aws-lc","events":[{"introduced":"6284822a2e30d9a8497ba7e07bf3f506808912f2"},{"fixed":"47389586f8aa77c83245173793f4d44ed1d6c3a8"},{"introduced":"190be0667cf1f7b39bed2c96760f08a6295b652b"},{"fixed":"83d85826595641bb2f23c6108f2e031fcd5cd505"}],"database_specific":{"extracted_events":[{"introduced":"1.24.0"},{"fixed":"1.71.0"},{"introduced":"3.0.0"},{"fixed":"3.3.0"}],"source":"AFFECTED_FIELD"}}],"versions":["AWS-LC-FIPS-3.2.0","v1.70.0","v1.69.0","v1.68.0","AWS-LC-FIPS-3.1.0","v1.67.0","v1.66.2","v1.66.1","v1.66.0","AWS-LC-FIPS-NETOS-v1.29.1","v1.65.1","v1.65.0","v1.64.0","v1.63.0","v1.62.1","v1.62.0","v1.61.4","v1.61.3","v1.61.2","v1.61.1","v1.61.0","v1.60.0","v1.59.0","v1.58.1","v1.58.0","v1.57.1","v1.57.0","v1.56.0","v1.55.0","v1.54.0","v1.53.1","v1.53.0","v1.52.1","v1.52.0","v1.51.2","v1.51.1","v1.51.0","v1.50.1","v1.50.0","v1.49.1","v1.49.0","v1.48.5","v1.48.4","v1.48.3","v1.48.2","v1.48.1","v1.48.0","v1.47.0","AWS-LC-FIPS-3.0.0","v1.46.1","v1.46.0","v1.45.0","v1.44.0","v1.43.0","v1.42.0","v1.41.1","v1.41.0","v1.40.0","v1.39.0","v1.38.0","v1.37.0","v1.36.1","v1.36.0","v1.35.1","v1.35.0","v1.34.2","v1.34.1","v1.34.0","v1.33.0","v1.29.0","v1.32.0","v1.31.0","v1.30.1","v1.30.0","v1.28.0","v1.27.0","v1.26.0","v1.25.0","v1.24.1","v1.24.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-4428.json","vanir_signatures_modified":"2026-08-12T16:24:28Z","vanir_signatures":[{"target":{"file":"crypto/x509/x509_vfy.c","function":"crl_crldp_check"},"deprecated":false,"digest":{"length":621,"function_hash":"315553051490645340434301782701760588989"},"id":"CVE-2026-4428-4fef2854","signature_type":"Function","signature_version":"v1","source":"https://github.com/aws/aws-lc/commit/83d85826595641bb2f23c6108f2e031fcd5cd505"},{"signature_version":"v1","source":"https://github.com/aws/aws-lc/commit/83d85826595641bb2f23c6108f2e031fcd5cd505","target":{"file":"crypto/x509/x509_test.cc"},"deprecated":false,"digest":{"line_hashes":["67546155362554212794720633293763579087","60173126581954837125601684341052211646","171474131814531793932529892352574222281","179823018402105157128282776881034288750","126559276406436210284828049326390844784","67089962090722491870780077947163980547"],"threshold":0.9},"id":"CVE-2026-4428-858c9e2d","signature_type":"Line"},{"deprecated":false,"digest":{"threshold":0.9,"line_hashes":["211160966742197397106823759224917572755","35047788452717782869365276537476936","280559450770590975653021767826529623376","153990721801522824870147534967993801522","27068015445326099177373872550785267766","217631864836764034369360838167683719714","196990455326174579627504348853721303576","152716710549071912863749139833951271141","230925751211779502697051772006460993554","90797013554136129170406954188265437728","186246592097486328349711158695014349986"]},"id":"CVE-2026-4428-a4bd71ac","signature_type":"Line","signature_version":"v1","source":"https://github.com/aws/aws-lc/commit/47389586f8aa77c83245173793f4d44ed1d6c3a8","target":{"file":"crypto/x509/x509_vfy.c"}},{"id":"CVE-2026-4428-aa813e60","signature_type":"Line","signature_version":"v1","source":"https://github.com/aws/aws-lc/commit/83d85826595641bb2f23c6108f2e031fcd5cd505","target":{"file":"crypto/x509/x509_vfy.c"},"deprecated":false,"digest":{"line_hashes":["211160966742197397106823759224917572755","35047788452717782869365276537476936","280559450770590975653021767826529623376","153990721801522824870147534967993801522","27068015445326099177373872550785267766","217631864836764034369360838167683719714","196990455326174579627504348853721303576","152716710549071912863749139833951271141","230925751211779502697051772006460993554","90797013554136129170406954188265437728","186246592097486328349711158695014349986"],"threshold":0.9}},{"deprecated":false,"digest":{"function_hash":"315553051490645340434301782701760588989","length":621},"id":"CVE-2026-4428-cb29f789","signature_type":"Function","signature_version":"v1","source":"https://github.com/aws/aws-lc/commit/47389586f8aa77c83245173793f4d44ed1d6c3a8","target":{"file":"crypto/x509/x509_vfy.c","function":"crl_crldp_check"}},{"digest":{"line_hashes":["67546155362554212794720633293763579087","60173126581954837125601684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