CVE-2026-59692Gstreamer1-plugins-bad-free: gstreamer: dtls certificate subject dn stack buffer overflow in openssl_verify_callback

Description

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.

Timeline

Scores

EPSS (exploitation in 30 days)

0.58% · top 52% of all CVEs (14 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: yes · Technical impact: partial

The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.

Affected products

• Red Hat · Red Hat Enterprise Linux 10

  • unaffected 0:1.26.7-2.el10_2.6 – < *

• Red Hat · Red Hat Enterprise Linux 10.0 Extended Update Support

  • unaffected 0:1.24.11-3.el10_0.6 – < *

• Red Hat · Red Hat Enterprise Linux 7 Extended Lifecycle Support

  • unaffected 0:1.10.4-7.el7_9 – < *

• Red Hat · Red Hat Enterprise Linux 8

  • unaffected 0:1.16.1-9.el8_10.1 – < *

• Red Hat · Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support

  • unaffected 0:1.16.1-4.el8_4.4 – < *

• Red Hat · Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On

  • unaffected 0:1.16.1-4.el8_4.4 – < *

• Red Hat · Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support

  • unaffected 0:1.16.1-4.el8_6.4 – < *

• Red Hat · Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On

  • unaffected 0:1.16.1-4.el8_6.4 – < *

• Red Hat · Red Hat Enterprise Linux 8.8 Telecommunications Update Service

  • unaffected 0:1.16.1-4.el8_8.4 – < *

• Red Hat · Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions

  • unaffected 0:1.16.1-4.el8_8.4 – < *

• Red Hat · Red Hat Enterprise Linux 9

  • unaffected 0:1.22.12-7.el9_8.3 – < *

• Red Hat · Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

  • unaffected 0:1.18.4-9.el9_2.5 – < *

• Red Hat · Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

  • unaffected 0:1.22.1-6.el9_4.6 – < *

• Red Hat · Red Hat Enterprise Linux 9.6 Extended Update Support

  • unaffected 0:1.22.12-5.el9_6.6 – < *

• Red Hat · Red Hat Enterprise Linux 6

  All versions: affected

• Red Hat · Red Hat Enterprise Linux 7

  All versions: affected

What to do

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.

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• EUVD EUVD-2026-42570 (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2026-59692](https://cveledger.app/badge/CVE-2026-59692.svg)](https://cveledger.app/cve/CVE-2026-59692)

Record last updated 4 Nov 2026, 23:09 UTC.