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Microsoft Security Response CenterCVE-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.

Mariner

Read the vendor bulletin Get alerts for azl3 zlib 1.3.1-1 on Azure Linux
2.9CVSS out of 10Low severity
Scope

What the vendor says is affected

  • azl3 zlib 1.3.1-1 on Azure Linux 3.0

Versions the vendor lists as fixed

  • 1.3.2-1
Next step

What the vendor recommends

CBL-Mariner Releases

Review the complete instructions on the vendor's site
Timeline

When this advisory changed

  1. Published by Microsoft Security Response Center

    The publication date reported by the vendor.

  2. Updated by Microsoft Security Response Center

    The vendor changed the advisory after it was first published.

  3. Added to SecurityAlert

    We collected the advisory from the official source.

Vulnerabilities

CVEs named in this advisory

CVE-2026-27171View CVSS, KEV, EPSS, and threat context
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