Description
A logic vulnerability was found in GStreamer's webrtcbin component. The _check_sdp_crypto() function contains an inverted boolean condition that causes it to accept remote SDP offers or answers that lack the required a=fingerprint attribute, while incorrectly rejecting those that include it. An attacker with the ability to intercept and modify WebRTC signaling messages could exploit this to bypass the SDP-level DTLS certificate fingerprint binding, weakening defenses against man-in-the-middle attacks on media streams.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | — | — |
| Red Hat | Red Hat Enterprise Linux 6 | — | — |
| Red Hat | Red Hat Enterprise Linux 7 | — | — |
| Red Hat | Red Hat Enterprise Linux 8 | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | gst-plugins-bad1.0 | 1.28.5-1 | — |
| Debian 13 | gst-plugins-bad1.0 | No fix yet | — |
| Debian 12 | gst-plugins-bad1.0 | 1.22.0-4+deb12u8 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | gst-plugins-bad1.0 | No fix yet | — |
| Ubuntu 26.04 LTS | gst-plugins-bad1.0 | No fix yet | — |
| Ubuntu 25.10 | gst-plugins-bad1.0 | No fix yet | — |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 24.04 LTS | gst-plugins-bad1.0 | No fix yet | — |
| Ubuntu Pro 22.04 LTS | gst-plugins-bad1.0 | No fix yet | — |
| Ubuntu Pro 20.04 LTS | gst-plugins-bad1.0 | No fix yet | — |
| Ubuntu Pro 18.04 LTS | gst-plugins-bad1.0 | No fix yet | — |
| Ubuntu Pro 16.04 LTS | gst-plugins-bad1.0 | No fix yet | — |
| Ubuntu Pro 14.04 LTS | gst-plugins-bad1.0 | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP7 | gstreamer-plugins-bad | 1.24.0-150600.4.9.1 | SUSE-SU-2026:3058-1 |
| SLES 15 SP6 | gstreamer-plugins-bad | 1.24.0-150600.4.9.1 | SUSE-SU-2026:3058-1 |
| SLES 15 SP5 | gstreamer-plugins-bad | 1.22.0-150500.3.34.1 | SUSE-SU-2026:3125-1 |
| SLES 15 SP4 | gstreamer-plugins-bad | 1.20.1-150400.3.29.1 | SUSE-SU-2026:3133-1 |
Show 8 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | gstreamer-plugins-bad | 1.26.7-160000.3.1 | SUSE-SU-2026:22817-1 |
| SLES for SAP 15 SP6 | gstreamer-plugins-bad | 1.24.0-150600.4.9.1 | SUSE-SU-2026:3058-1 |
| SLES for SAP 15 SP5 | gstreamer-plugins-bad | 1.22.0-150500.3.34.1 | SUSE-SU-2026:3125-1 |
| SLES for SAP 15 SP4 | gstreamer-plugins-bad | 1.20.1-150400.3.29.1 | SUSE-SU-2026:3133-1 |
| SLES 16.0 | gstreamer-plugins-bad | 1.26.7-160000.3.1 | SUSE-SU-2026:22817-1 |
| SLE Micro 6.2 | gstreamer-plugins-bad | 1.26.7-160000.3.1 | SUSE-SU-2026:22752-1 |
| SLE HPC 15 SP5 | gstreamer-plugins-bad | 1.22.0-150500.3.34.1 | SUSE-SU-2026:3125-1 |
| SLE HPC 15 SP4 | gstreamer-plugins-bad | 1.20.1-150400.3.29.1 | SUSE-SU-2026:3133-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 16.0 | gstreamer-plugins-bad | 1.26.7-160000.3.1 | openSUSE-SU-2026:21370-1 |
Advisories 7
- WID-SEC-2026-2229 GStreamer (webrtcbin): Schwachstelle ermöglicht Umgehen von Sicherheitsvorkehrungen BSI CERT-Bund (WID) · Oct 15, 2026
- SUSE-SU-2026:22817-1 Security update for gstreamer-plugins-bad SUSE / openSUSE Security Updates · Jul 28, 2026
- SUSE-SU-2026:22752-1 Security update for gstreamer-plugins-bad SUSE / openSUSE Security Updates · Jul 23, 2026
- openSUSE-SU-2026:21370-1 Security update for gstreamer-plugins-bad SUSE / openSUSE Security Updates · Jul 22, 2026
- SUSE-SU-2026:3125-1 Security update for gstreamer-plugins-bad SUSE / openSUSE Security Updates · Jul 21, 2026
- SUSE-SU-2026:3133-1 Security update for gstreamer-plugins-bad SUSE / openSUSE Security Updates · Jul 21, 2026
- SUSE-SU-2026:3058-1 Security update for gstreamer-plugins-bad SUSE / openSUSE Security Updates · Jul 16, 2026