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zlib

Records18All Threatist records
Exploited (KEV)0None in CISA KEV
CVSS critical5CVSS 9.0–10.0
CVSS high7CVSS 7.0–8.9

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zlib records in CISA KEV

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18 records

Priority HIGH 71

zlib versions 1.3.1.2 through 1.3.2 contain a heap buffer overflow vulnerability in the gz_vacate() function when processing non-blocking gzwrite() operations with stale external buffer pointers.

CVSS 4.0HIGH 8.3 Network No auth No interaction EPSS 0.00469 Published 2026-09-03 No fix listed CWE-787
Priority MEDIUM 62

zlib versions up to and including 1.3.1.2 include a global buffer overflow in the untgz utility located under contrib/untgz.

CVSS 4.0MEDIUM 4.6 Local No auth User interaction EPSS 0.00413 Published 2026-01-07 Will not fix CWE-787
Priority MEDIUM 54

The decompression algorithm in zlib 1.1.3 and earlier, as used in many different utilities and packages, causes inflateEnd to release certain memory more than once (a "double free"), which may allow local and remote atta…

CVSS 3.1CRITICAL 9.8 Network No auth No interaction EPSS 0.09691 Published 2002-06-25 Fixed CWE-415
Priority LOW 20

Race condition in pigz before 2.2.5 uses permissions derived from the umask when compressing a file before setting that file's permissions to match those of the original file, which might allow local users to bypass inte…

CVSS 2.0MEDIUM 4.4 Local No auth Interaction — EPSS 0.0034 Published 2014-04-27 No fix listed CWE-264
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