This page tracks the Debian fix status. The vulnerability itself is described on the main CVE page.
View CVE-2026-102559 →
DEBIAN-CVE-2026-102559
A flaw was found in libsoup. When constructing a masked WebSocket client frame for a very large outgoing payload, size values passed to GByteArray all...
Original description
The description as published by the source.
A flaw was found in libsoup. When constructing a masked WebSocket client frame for a very large outgoing payload, size values passed to GByteArray allocation APIs could be truncated while the masking routine still used the full length, causing a heap buffer overflow.
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