CVE-2026-27171

LOW

2.9

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.

CVE Details

CVSS v3.1 Score2.9

SeverityLOW

CVSS VectorCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack VectorLOCAL

ComplexityHIGH

Privileges RequiredNONE

User InteractionNONE

Published2/18/2026

Last Modified3/25/2026

Sourcenvd

Honeypot Sightings0

Affected Products

zlib:zlib

Weaknesses (CWE)

CWE-1284

References

https://7asecurity.com/blog/2026/02/zlib-7asecurity-audit/(cve@mitre.org)

https://7asecurity.com/reports/pentest-report-zlib-RC1.1.pdf(cve@mitre.org)

https://github.com/madler/zlib/issues/904(cve@mitre.org)

https://github.com/madler/zlib/releases/tag/v1.3.2(cve@mitre.org)

https://ostif.org/zlib-audit-complete/(cve@mitre.org)

https://7asecurity.com/reports/pentest-report-zlib-RC1.1.pdf(134c704f-9b21-4f2e-91b3-4a467353bcc0)

IOC Correlations

No correlations recorded

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