| Name | CVE-2026-52720 |
| Description | A heap buffer overflow vulnerability was found in GStreamer's librfb (RFB/VNC client). The rectangle bounds check incorrectly validates area rather than individual dimensions, allowing a malicious VNC server to send a rectangle that extends beyond the framebuffer. A remote attacker could set up a malicious VNC server and trick a user into connecting, resulting in an out-of-bounds heap write that could lead to code execution or a crash. |
| 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 |
|---|---|---|---|
| gst-plugins-bad1.0 (PTS) | bullseye | 1.18.4-3+deb11u4 | vulnerable |
| bullseye (security) | 1.18.4-3+deb11u6 | vulnerable | |
| bookworm, bookworm (security) | 1.22.0-4+deb12u7 | vulnerable | |
| trixie | 1.26.2-3+deb13u1 | vulnerable | |
| trixie (security) | 1.26.2-3+deb13u2 | vulnerable | |
| forky, sid | 1.28.4-1 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| gst-plugins-bad1.0 | source | (unstable) | (unfixed) |
[trixie] - gst-plugins-bad1.0 <no-dsa> (Minor issue)
https://bugzilla.redhat.com/show_bug.cgi?id=2486731
https://gstreamer.freedesktop.org/security/sa-2026-0043.html
https://gitlab.freedesktop.org/gstreamer/gstreamer/-/work_items/5105 (private)
https://gitlab.freedesktop.org/gstreamer/gstreamer/-/commit/f3b66928a194b32b27fac3c3379d3d20e5966442 (1.29.2)
https://gitlab.freedesktop.org/gstreamer/gstreamer/-/commit/1ca88138fb0f8562861956b66a0c98406bcb7370 (1.26 branch)