| Name | CVE-2026-102559 |
| Description | 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 | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| libsoup2.4 (PTS) | bookworm | 2.74.3-1+deb12u1 | vulnerable |
| trixie | 2.74.3-10.1 | vulnerable | |
| libsoup3 (PTS) | bookworm | 3.2.3-0+deb12u2 | vulnerable |
| trixie | 3.6.5-3 | vulnerable | |
| forky, sid | 3.6.6-1 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| libsoup2.4 | source | (unstable) | (unfixed) | |||
| libsoup3 | source | (unstable) | (unfixed) |
[trixie] - libsoup3 <no-dsa> (Minor issue)
[trixie] - libsoup2.4 <no-dsa> (Minor issue)
https://bugzilla.redhat.com/show_bug.cgi?id=2543285
https://gitlab.gnome.org/GNOME/libsoup/-/work_items/554
Fixed by: https://gitlab.gnome.org/GNOME/libsoup/-/commit/d7f074f8c8c90216f2476522836287c6f80fc53e (3.7.3)