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zlib: Buffer Overflow in Zlib::GzipReader ungetc via large input leads to memory corruption

🗓️ 18 Apr 2026 08:01:50Reported by MicrosoftType 
mscve
 mscve
🔗 msrc.microsoft.com👁 3 Views

Buffer overflow in Zlib::GzipReader from ungetc with large input causes memory corruption.

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06 May 2026 21:52Current
7.5High risk
Vulners AI Score7.5
CVSS 3.19.8
CVSS 46.3
EPSS0.00017
SSVC
3