CVE-2026-27171

LOW

zlib < 1.3.2 - Denial of Service via crc32_combine64 Function

Title source: llm
STIX 2.1

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.

References (5)

Core 5

Scores

CVSS v3 2.9
EPSS 0.0020
EPSS Percentile 10.3%
Attack Vector LOCAL
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-1284
Status published
Products (1)
zlib/zlib < 1.3.2
Published Feb 18, 2026
Tracked Since Feb 18, 2026