{"schema_version":"1.9.0","id":"CVE-2026-27171","published":"2026-02-18T02:36:19.509Z","modified":"2026-08-12T03:51:33.275101223Z","related":["CGA-624v-j5jq-2hph","SUSE-SU-2026:0783-1","SUSE-SU-2026:20659-1","SUSE-SU-2026:20709-1","SUSE-SU-2026:21013-1","SUSE-SU-2026:21151-1","openSUSE-SU-2026:10617-1","openSUSE-SU-2026:20487-1"],"details":"zlib before 1.3.2 allows CPU consumption via crc32_combine64 and crc32_combine_gen64 because x2nmodp can do right shifts within a loop that has no termination condition.","affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/madler/zlib","events":[{"introduced":"21767c654d31d2dccdde4330529775c6c5fd5389"},{"fixed":"da607da739fa6047df13e66a2af6b8bec7c2a498"}],"database_specific":{"cpe":"cpe:2.3:a:zlib:zlib:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0"},{"fixed":"1.3.2"},{"introduced":"1.2.12"}],"source":["AFFECTED_FIELD","CPE_RANGE","REFERENCES"]}}],"versions":["v1.3.1.2","v1.3.1","v1.3","v1.2.13","v1.2.12"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-27171.json"}}],"references":[{"type":"WEB","url":"https://7asecurity.com/reports/pentest-report-zlib-RC1.1.pdf"},{"type":"WEB","url":"https://github.com/madler/zlib/releases/tag/v1.3.2"},{"type":"WEB","url":"https://ostif.org/zlib-audit-complete/"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27171.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-27171"},{"type":"REPORT","url":"https://github.com/madler/zlib/issues/904"},{"type":"ARTICLE","url":"https://7asecurity.com/blog/2026/02/zlib-7asecurity-audit/"}],"database_specific":{"cna_assigner":"mitre","cwe_ids":["CWE-1284"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27171.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L"}]}