CVE-2026-59692
Gstreamer1-plugins-bad-free: gstreamer: dtls certificate subject dn stack buffer overflow in openssl_verify_callback
A stack buffer overflow vulnerability was found in GStreamer's DTLS plugin. During a DTLS handshake, the peer certificate Subject Distinguished Name is printed into a fixed-size 2048-byte stack buffer without bounds checking. A remote unauthenticated attacker can send a certificate with an oversized Subject DN that exceeds the buffer, causing a stack buffer overflow and process crash, resulting in denial of service.
Fixes and workarounds
Workaround
There is no complete mitigation for this vulnerability. The following measures can reduce risk: 1. If WebRTC/DTLS functionality is not required, remove the DTLS plugin shared object from the GStreamer plugins directory (typically /usr/lib64/gstreamer-1.0/libgstdtls.so). 2. Restrict network access to WebRTC/DTLS endpoints to trusted peers only via firewall rules. 3. Deploy GStreamer WebRTC services behind a reverse proxy or media server that validates DTLS certificates before forwarding.
Source: CNA: redhatAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| Red Hat Enterprise Linux 10 Red Hat gstreamer1-plugins-bad-free
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:1.26.7-2.el10_2.6; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 10.0 Extended Update Support Red Hat gstreamer1-plugins-bad-free
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:1.24.11-3.el10_0.6; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 7 Extended Lifecycle Support Red Hat gstreamer1-plugins-bad-free
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:1.10.4-7.el7_9; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 8 Red Hat gstreamer1-plugins-bad-free
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:1.16.1-9.el8_10.1; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support Red Hat gstreamer1-plugins-bad-free
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:1.16.1-4.el8_4.4; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On Red Hat gstreamer1-plugins-bad-free
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:1.16.1-4.el8_4.4; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support Red Hat gstreamer1-plugins-bad-free
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:1.16.1-4.el8_6.4; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On Red Hat gstreamer1-plugins-bad-free
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:1.16.1-4.el8_6.4; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 8.8 Telecommunications Update Service Red Hat gstreamer1-plugins-bad-free
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:1.16.1-4.el8_8.4; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions Red Hat gstreamer1-plugins-bad-free
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:1.16.1-4.el8_8.4; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 9 Red Hat gstreamer1-plugins-bad-free
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:1.22.12-7.el9_8.3; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions Red Hat gstreamer1-plugins-bad-free
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:1.18.4-9.el9_2.5; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions Red Hat gstreamer1-plugins-bad-free
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:1.22.1-6.el9_4.6; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 9.6 Extended Update Support Red Hat gstreamer1-plugins-bad-free
https://access.redhat.com/downloads/content/package-browser/ |
≥ 0:1.22.12-5.el9_6.6; < * (unaffected, rpm)
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 6 Red Hat gstreamer-plugins-bad-free
https://access.redhat.com/downloads/content/package-browser/ |
Range not reported
Other versions: affected |
CNA: redhat |
| Red Hat Enterprise Linux 7 Red Hat gstreamer-plugins-bad-free
https://access.redhat.com/downloads/content/package-browser/ |
Range not reported
Other versions: affected |
CNA: redhat |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 7.5 high |
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | CNA: redhat |
| 3.1 / 7.5 high |
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | NVD: [email protected] |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://access.redhat.com/errata/RHSA-2026:47179CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:47180CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:47731CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:54658CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:54659CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:54660CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:54664CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:54665CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:54752CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:56658CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/errata/RHSA-2026:56772CNA: redhat · vendor-advisory, x_refsource_REDHAT
- https://access.redhat.com/security/cve/CVE-2026-59692CNA: redhat · vdb-entry, x_refsource_REDHAT
- https://bugzilla.redhat.com/show_bug.cgi?id=2497344CNA: redhat · issue-tracking, x_refsource_REDHAT
- https://gitlab.freedesktop.org/gstreamer/gstreamer-security/-/merge_requests/99CNA: redhat
- https://gitlab.freedesktop.org/gstreamer/gstreamer/-/work_items/5172CNA: redhat
- https://access.redhat.com/errata/RHSA-2026:47179[email protected]
- https://access.redhat.com/errata/RHSA-2026:47180[email protected]
- https://access.redhat.com/errata/RHSA-2026:47731[email protected]
- https://access.redhat.com/errata/RHSA-2026:54658[email protected]
- https://access.redhat.com/errata/RHSA-2026:54659[email protected]
- https://access.redhat.com/errata/RHSA-2026:54660[email protected]
- https://access.redhat.com/errata/RHSA-2026:54664[email protected]
- https://access.redhat.com/errata/RHSA-2026:54665[email protected]
- https://access.redhat.com/errata/RHSA-2026:54752[email protected]
- https://access.redhat.com/errata/RHSA-2026:56658[email protected]
- https://access.redhat.com/errata/RHSA-2026:56772[email protected]
- https://access.redhat.com/security/cve/CVE-2026-59692[email protected]
- https://bugzilla.redhat.com/show_bug.cgi?id=2497344[email protected]
- https://gitlab.freedesktop.org/gstreamer/gstreamer-security/-/merge_requests/99[email protected]
- https://gitlab.freedesktop.org/gstreamer/gstreamer/-/work_items/5172[email protected]
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