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-2026-27171
Date
Source
MSRC
MSRC
Vendor
Microsoft
Microsoft
Threat
low
low
CVSS
2.9
2.9
Summary
Advisory CVE-2026-27171. zlib before 1.3.2 allows CPU consumption via crc32_combine64 and crc32_combine_gen64 because x2nmodp can do right shifts within a loop… Vendor: Microsoft. Source: MSRC. Threat: low. CVSS 2.9. See the official…
What to do
General, cautious steps (verify details in the official source):
- Review exposure and plan remediation based on risk and environment.
- Identify affected product versions in your inventory and verify whether you are impacted.
- Apply vendor patches/updates or recommended mitigations as soon as available.
- Read the official advisory for exact affected versions and remediation steps.