RHSA-2025:8314 — Security Advisory

An update for zlib is now available for Red Hat Enterprise Linux 7 Extended Lifecycle Support.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

The zlib packages provide a general-purpose lossless data compression library that is used by many different programs.

Security Fix(es):

• pcl: zlib: Improper Pointer Arithmetic in pcl (CVE-2025-4638)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.