CVE-2026-85091

A flaw was found in zlib. A heap buffer overflow vulnerability exists in the gzvacate function. This flaw can be triggered by a remote attacker calling gzprintf or gzvprintf after a write stall during non-blocking gzwrite operations with stale external buffer pointers. Successful exploitation cou...

CLSA-2026-1791915688 zlib: Fix of CVE-2026-76844

CVE-2026-76844: reset strm.nextin and strm.availin in gzwrite when a direct write fails, so a later gzwrite after gzclearerr cannot copy past the input buffer...

SUSE CVE-2026-85091

zlib 1.2.11 through 1.3.2 contains a heap buffer overflow: after an underlying write fails, gzwrite returns without resetting strm.nextin, leaving it pointed at the caller's buffer. A later gz write call then derives a position from the stale pointer and writes past a heap allocation; any write...

Linux Distros Unpatched Vulnerability : CVE-2026-85091

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - zlib 1.2.11 through 1.3.2 contains a heap buffer overflow: after an underlying write fails, gzwrite returns without resetting strm.nextin, leaving it pointed at...

ALPINE-CVE-2026-85091

zlib 1.2.11 through 1.3.2 contains a heap buffer overflow: after an underlying write fails, gzwrite returns without resetting strm.nextin, leaving it pointed at the caller's buffer. A later gz write call then derives a position from the stale pointer and writes past a heap allocation; any write...

CVE-2026-85091

zlib 1.2.11 through 1.3.2 contains a heap buffer overflow: after an underlying write fails, gzwrite returns without resetting strm.nextin, leaving it pointed at the caller's buffer. A later gz write call then derives a position from the stale pointer and writes past a heap allocation; any write...

CVE-2026-85091

zlib versions 1.3.1.2 through 1.3.2 contain a heap buffer overflow vulnerability in the gzvacate 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...

EUVD-2026-70301

zlib versions 1.3.1.2 through 1.3.2 contain a heap buffer overflow vulnerability in the gzvacate 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...

CVE-2026-85091 zlib 1.2.11 through 1.3.2 Heap Buffer Overflow via Stale gzwrite Pointer After Failed Write

zlib 1.2.11 through 1.3.2 contains a heap buffer overflow: after an underlying write fails, gzwrite returns without resetting strm.nextin, leaving it pointed at the caller's buffer. A later gz write call then derives a position from the stale pointer and writes past a heap allocation; any write...

CVE-2026-85091: Out-of-bounds Write

zlib versions 1.3.1.2 through 1.3.2 contain a heap buffer overflow vulnerability in the gzvacate 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...

PT-2026-90900

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...

CVE-2026-85091: Out-of-bounds Write

zlib versions 1.3.1.2 through 1.3.2 contain a heap buffer overflow vulnerability in the gzvacate 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...

PT-2026-84905

Name of the Vulnerable Software and Affected Versions zlib versions 1.3.1.2 through 1.3.2 Description A heap buffer overflow occurs in the gz vacate function during the processing of non-blocking gzwrite operations involving stale external buffer pointers. This issue is triggered when gzprintf or...

PT-2026-90897

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...

PT-2026-90899

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...

PT-2026-90901

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...

PT-2026-90898

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...