Product by Debian
Zlib
10 known vulnerabilities in Zlib (Debian), 0 of them actively exploited (CISA KEV).
Key figures
10
Vulnerabilities
0
Actively exploited (KEV)
0
Used by ransomware
4
Critical
Vulnerabilities
Actively exploited vulnerabilities (CISA KEV) first, then by priority. Click a column header to re-sort the table.
| High | CVE-2018-25032 | zlib: Out-of-bounds Write | 7.5 | |
| Critical | CVE-2022-37434 | zlib: Classic Buffer Overflow | 9.8 | |
| Critical | CVE-2016-9841 | zlib: security vulnerability | 9.8 | |
| Critical | CVE-2016-9843 | zlib: security vulnerability | 9.8 | |
| High | CVE-2016-9842 | zlib: security vulnerability | 8.8 | |
| High | CVE-2016-9840 | zlib: security vulnerability | 8.8 | |
| Critical | CVE-2026-27820 | zlib: Buffer Overflow in Zlib::GzipReader ungetc via large input leads to memory corruption | 9.8 | |
| High | CVE-2026-85091 | zlib 1.3.1.2 through 1.3.2 Heap Buffer Overflow via gz_vacate | 7.4 | |
| High | CVE-2026-76844 | zlib 1.2.11 through 1.3.2 Heap Buffer Overflow via Stale gzwrite Pointer After Failed Write | 7.4 | |
| Medium | CVE-2026-27171 | zlib: Improper Validation of Specified Quantity in Input | 2.9 |