This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page.
View CVE-2026-102556 →
DEBIAN-CVE-2026-102556
A flaw was found in libsoup. When handling an incoming WebSocket Pong frame, SoupWebsocketConnection emitted the ::pong signal with a GByteArray point...
Original description
The description as published by the source.
A flaw was found in libsoup. When handling an incoming WebSocket Pong frame, SoupWebsocketConnection emitted the ::pong signal with a GByteArray pointer even though the signal is declared to pass a GBytes. Applications connecting a handler that follows the documented GBytes API can trigger heap corruption or a crash upon receiving a crafted Pong.
Source: OSV.dev (Open Source Vulnerabilities) OSV
Affected packages
Debian:12
libsoup2.4
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:13
libsoup2.4
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:12
libsoup3
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:13
libsoup3
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Debian:14
libsoup3
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
References
- advisory security-tracker.debian.org