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CVE-2026-85091 on Cyberus Linux 26.05

Aliases: CVE-2026-85091

Packages: zlib

Status: Plausible

Advisory Information

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.

Updates

2026-10-09 16:35 CEST

Metadata changes:

  • Status for package zlib: “Plausible”

2026-10-09 16:31 CEST

Metadata changes:

  • Status for package zlib: “New”