CVEvulnerability
CVE-2026-27171
5.5 MEDIUM
Official page ↗
- Status
- Analyzed
- Published
- 2026-02-18
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 2.9 LOW — CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
- CVSS 3.1 ([email protected])
- 5.5 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weaknesses
- CWE-1284
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.
Affected configurations
• zlib zlib (>= 1.2.12 < 1.3.2)
Related
Weakness · CWE (1)
- CWE-1284 Improper Validation of Specified Quantity in Input weakness
References
- https://7asecurity.com/blog/2026/02/zlib-7asecurity-audit/ Product
- https://7asecurity.com/reports/pentest-report-zlib-RC1.1.pdf Technical Description
- https://github.com/madler/zlib/issues/904 Exploit, Issue Tracking
- https://github.com/madler/zlib/releases/tag/v1.3.2 Release Notes
- https://ostif.org/zlib-audit-complete/ Product
- https://7asecurity.com/reports/pentest-report-zlib-RC1.1.pdf Technical Description