CVE-2026-85091 - zlib Heap Buffer Overflow

CVE-2026-85091 - zlib Heap Buffer Overflow

https://cvefeed.io/rssfeed/latest.atom / Thu, 09/03/2026 - 07:29
CVE ID :CVE-2026-85091
Published : Sept. 3, 2026, 2:20 a.m. | 2 hours, 43 minutes ago
Description :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. Attackers can trigger the overflow by calling gzprintf() or gzvprintf() after a write stall, causing an unchecked memmove() to write beyond the internal input buffer boundary.
Severity: 7.4 | HIGH
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