| Name | CVE-2026-59691 |
| Description | A heap buffer overflow vulnerability was found in GStreamer's rfbsrc plugin. When a client connects to a malicious RFB/VNC server that advertises a 16bpp framebuffer and sends Hextile-encoded updates, the Hextile background fill path writes 32-bit pixel values into a buffer allocated for 16-bit pixels. This type mismatch causes an out-of-bounds heap write that can lead to denial of service (process crash) and potential memory corruption. |
| 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 (security), trixie | 1.26.2-3+deb13u2 | vulnerable | |
| forky, sid | 1.28.5-2 | fixed |
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) | 1.28.5-1 |
[trixie] - gst-plugins-bad1.0 <no-dsa> (Minor issue)
https://gstreamer.freedesktop.org/security/sa-2026-0063.html
https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/12054
Fixed by: https://gitlab.freedesktop.org/gstreamer/gstreamer/-/commit/56f8cfd851ab640f1fd40ea983b6ea2affae3057 (1.28.5)
Fixed by: https://gitlab.freedesktop.org/gstreamer/gstreamer/-/commit/d81d9f92d73aa3a689409973608962a62b64e926 (1.28.5)