Import Source
https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-99090.json
JSON Data
https://api.osv.dev/v1/vulns/AZL-99090
Upstream
Published
2026-09-03T13:06:20Z
Modified
2026-09-04T14:17:10.864488187Z
Summary
CVE-2026-85091 affecting package zlib 1.3.2-1
Details

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.

References

Affected packages

Azure Linux:3 / zlib

Package

Name
zlib
Purl
pkg:rpm/azure-linux/zlib

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Last affected
1.3.2-1

Database specific

source
"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-99090.json"