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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.

PUBLISHED Reserved 2026-07-06 | Published 2026-07-09 | Updated 2026-07-09 | Assigner redhat




HIGH: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Problem types

Stack-based Buffer Overflow

Product status

Default status
affected

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affected

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affected

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affected

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affected

Default status
affected

Timeline

2026-07-06:Reported to Red Hat.
2026-07-08:Made public.

Credits

Red Hat would like to thank Clouditera Security (Clouditera), NSFOCUS (NSFOCUS), and Z.ai Security (Z.ai) for reporting this issue.

References

access.redhat.com/security/cve/CVE-2026-59692 vdb-entry

bugzilla.redhat.com/show_bug.cgi?id=2497344 (RHBZ#2497344) issue-tracking

gitlab.freedesktop.org/...eamer-security/-/merge_requests/99

gitlab.freedesktop.org/gstreamer/gstreamer/-/work_items/5172

cve.org (CVE-2026-59692)

nvd.nist.gov (CVE-2026-59692)

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