PatchSiren cyber security CVE debrief
CVE-2026-59692 Red Hat CVE debrief
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.
- Vendor
- Red Hat
- Product
- Red Hat Enterprise Linux 10
- CVSS
- HIGH 7.5
- CISA KEV
- Not listed in stored evidence
- Original CVE published
- 2026-07-09
- Original CVE updated
- 2026-07-28
- Advisory published
- 2026-07-09
- Advisory updated
- 2026-07-28
Who should care
Users of GStreamer's DTLS plugin, particularly those in environments where remote unauthenticated access is possible, should prioritize patching this vulnerability to prevent potential denial-of-service attacks.
Technical summary
The vulnerability exists in the DTLS plugin of GStreamer, where the Subject Distinguished Name of a peer's certificate is copied into a 2048-byte stack buffer without proper bounds checking during the DTLS handshake process. An attacker can exploit this by sending a certificate with an excessively long Subject DN, leading to a stack buffer overflow and subsequent process crash. This results in a denial-of-service condition. The vulnerability is rated with a CVSS score of 7.5 and a HIGH severity.
Defensive priority
High
Recommended defensive actions
- Apply the official patch or update provided by the GStreamer maintainers as soon as possible.
- Implement compensating controls such as monitoring for unusual certificate lengths or handshake patterns.
- Conduct regular inventory checks to ensure all GStreamer installations are up-to-date and patched.
- Consider temporarily disabling DTLS functionality if not required, until a patch can be applied.
- Review network segmentation and isolation controls to limit potential impact.
- Monitor for and respond to potential certificate anomalies.
- Verify patch deployment and perform post-patch vulnerability scanning.
Evidence notes
The CVE record was published on 2026-07-09T11:16:41.783Z and was last modified on 2026-07-28T21:17:28.870Z. The NVD entry is currently Awaiting Analysis. Multiple references are provided, including links to Red Hat's errata and security pages, as well as bugzilla and GitLab entries related to the vulnerability and its fix.
Official resources
AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-07-09T11:16:41.783Z and has not been modified since then. The NVD entry is currently Awaiting Analysis.