| Name | CVE-2026-12478 |
| Description | The fix for CVE-2026-0716 (commit 6ff7ef0, libsoup 3.6.6) placed the integer overflow guard inside the if (masked) block, leaving unmasked server-to-client frames unprotected. A malicious WebSocket server can send a crafted unmasked frame with a payload length near UINT64_MAX to trigger an OOB read in a libsoup-based client when max_incoming_payload_size is set to 0. |
| 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) |
| Debian Bugs | 1142836 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| libsoup2.4 (PTS) | bullseye | 2.72.0-2 | fixed |
| bullseye (security) | 2.72.0-2+deb11u3 | fixed | |
| bookworm | 2.74.3-1+deb12u1 | fixed | |
| trixie | 2.74.3-10.1 | fixed | |
| libsoup3 (PTS) | bookworm | 3.2.3-0+deb12u2 | fixed |
| trixie | 3.6.5-3 | fixed | |
| 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) | (not affected) | |||
| libsoup3 | source | bookworm | (not affected) | |||
| libsoup3 | source | trixie | (not affected) | |||
| libsoup3 | source | (unstable) | (unfixed) | 1142836 |
[trixie] - libsoup3 <not-affected> (Fix for CVE-2026-0716 not applied)
[bookworm] - libsoup3 <not-affected> (Fix for CVE-2026-0716 not applied)
- libsoup2.4 <not-affected> (Fix for CVE-2026-0716 not applied)
https://gitlab.gnome.org/GNOME/libsoup/-/merge_requests/518