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zlib CPU Consumption Vulnerability
OESA-2026-1584
Summary
If you use zlib, an attacker may be able to cause your system to use excessive CPU resources. This could potentially slow down or crash your system. Update to zlib version 1.3.2 or later to protect against this issue.
What to do
- Update zlib to version 1.2.13-5.oe2403sp1.
Affected software
| Vendor | Product | Affected versions | Fix available |
|---|---|---|---|
| – | zlib | <= 1.2.13-5.oe2403sp1 | 1.2.13-5.oe2403sp1 |
Original title
zlib security update
Original description
Security Fix(es):
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)
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)
- https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA... Vendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2026-27171 Vendor Advisory
Published: 15 Mar 2026 · Updated: 15 Mar 2026 · First seen: 15 Mar 2026