A NULL pointer dereference flaw was found in GStreamers RTSP support library. The vulnerability occurs while parsing an Authorization or WWW-Authenticate header that uses Digest authentication. Specially crafted whitespace placement around a parameters terminator can cause an internal length calculation to underflow, leading to a crash of the process parsing the header. On an RTSP server this can be triggered by a remote, unauthenticated attacker sending a single malformed request when the server has authentication enabled; the same flaw can also be triggered against an RTSP client by a malicious or compromised RTSP server. Successful exploitation results in a denial of service (application crash) and has no confirmed impact on confidentiality or integrity.
Weakness
The product dereferences a pointer that it expects to be valid but is NULL.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Red Hat Enterprise Linux 10 | RedHat | gstreamer1-plugins-base-0:1.26.7-2.el10_2.2 | * |
| Red Hat Enterprise Linux 8 | RedHat | gstreamer1-plugins-base-0:1.16.1-7.el8_10 | * |
| Red Hat Enterprise Linux 9 | RedHat | gstreamer1-plugins-base-0:1.22.12-8.el9_8.2 | * |
| Gst-plugins-base1.0 | Ubuntu | upstream | * |
Potential Mitigations
References
- https://access.redhat.com/errata/RHSA-2026:66460
- https://access.redhat.com/errata/RHSA-2026:67145
- https://access.redhat.com/errata/RHSA-2026:69100
- https://access.redhat.com/security/cve/CVE-2026-85150
- https://bugzilla.redhat.com/show_bug.cgi?id=2527936
- https://gitlab.freedesktop.org/gstreamer/gstreamer-security/-/merge_requests/120
- https://gitlab.freedesktop.org/gstreamer/gstreamer/-/blob/main/subprojects/gst-plugins-base/gst-libs/gst/rtsp/gstrtspmessage.c#L1408