UNKNOWN Microsoft
CVE-2026-27820
zlib: Buffer Overflow in Zlib::GzipReader ungetc via large input leads to memory corruption
Microsoft Security Update 2026-Apr: zlib: Buffer Overflow in Zlib::GzipReader ungetc via large input leads to memory corruption
Affected Products
- azl3 zlib 1.3.2-1 on Azure Linux 3.0
- azl3 ruby 3.3.5-7 on Azure Linux 3.0
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-27820
- https://nvd.nist.gov/vuln/detail/CVE-2026-27820
This unknown severity vulnerability was published on 2026-04-14 via Microsoft. Affected: azl3 zlib 1.3.2-1 on Azure Linux 3.0, azl3 ruby 3.3.5-7 on Azure Linux 3.0.
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