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.

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Fixes

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History

Thu, 19 Feb 2026 00:15:00 +0000

Type Values Removed Values Added
Title zlib: zlib: Denial of Service via infinite loop in CRC32 combine functions
Weaknesses CWE-835
References
Metrics threat_severity

None

threat_severity

Low


Wed, 18 Feb 2026 14:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 18 Feb 2026 03:30:00 +0000

Type Values Removed Values Added
Description 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.
First Time appeared Zlib
Zlib zlib
Weaknesses CWE-1284
CPEs cpe:2.3:a:zlib:zlib:*:*:*:*:*:*:*:*
Vendors & Products Zlib
Zlib zlib
References
Metrics cvssV3_1

{'score': 2.9, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-02-18T13:38:55.713Z

Reserved: 2026-02-18T02:36:19.339Z

Link: CVE-2026-27171

cve-icon Vulnrichment

Updated: 2026-02-18T13:36:01.452Z

cve-icon NVD

Status : Analyzed

Published: 2026-02-18T04:16:01.263

Modified: 2026-02-20T16:45:28.827

Link: CVE-2026-27171

cve-icon Redhat

Severity : Low

Publid Date: 2026-02-18T02:36:19Z

Links: CVE-2026-27171 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-02-18T10:33:00Z

Weaknesses