Disclosure summary
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.
Source-reported weakness categories
CWE-1284
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
Microsoft Security Updates (CVRF) · 2026-Feb
Open original source · Updated Apr 14, 2026
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.
Maximum of vendor-reported product scores; products and fixed builds are associations, not a universal affected-version statement.
Microsoft maximum product score: 2.9
| Vendor | Product / association | Version / bounds |
|---|---|---|
| Microsoft update guide | azl3 zlib 1.3.1-1 on Azure Linux 3.0 | (MSRC status code 3) |
Vendor remediation references
- CBL-Mariner Releases · build 1.3.2-1 · product IDs 18109-17084
- Vendor guidance · product IDs 18109-17084
Original records & references
- NIST NVD record
- CVE Program record
- msrc.microsoft.com — Vendor advisory
PUBLISHED 2026-02-20T23:27:35-05:00
MODIFIED 2026-04-14T21:40:55-04:00
INGESTED 2026-10-08T12:45:17-04:00