RHSA-2026:92347 — Security Advisory

An update for libsoup is now available for Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support and Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On.

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 libsoup packages provide an HTTP client and server library for GNOME.

Security Fix(es):

• libsoup: libsoup: Heap buffer overflow from WebSocket Pong signal type confusion (CVE-2026-102556)

• libsoup: libsoup: Heap buffer overflow during WebSocket message reassembly (CVE-2026-102557)

• libsoup: libsoup: Heap buffer overflow during WebSocket receive-buffer growth (CVE-2026-102558)

• libsoup: libsoup: Heap buffer overflow during WebSocket client-frame masking (CVE-2026-102559)

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.