---
id: CVE-2026-85150
title: A NULL pointer dereference flaw was found in GStreamer's RTSP support library
summary: >-
  A NULL pointer dereference flaw was found in GStreamer's RTSP support library.
  The vulnerability occurs while parsing an Authorization or WWW-Authenticate
  header that uses Digest authentication. Specially crafted whitespace placement
  aro…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-476
vendor: Red Hat
product: gstreamer1-plugins-base
affected:
  - gstreamer1-plugins-base (all versions)
  - gstreamer1-plugins-base (all versions)
  - gstreamer1-plugins-base (all versions)
  - gstreamer1-plugins-base (all versions)
published: '2026-09-03'
updated: '2026-09-21'
sourceUpdated: '2026-09-21T18:17:11.550'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-85150'
references:
  - url: 'https://access.redhat.com/errata/RHSA-2026:66460'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:67145'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:69100'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/security/cve/CVE-2026-85150'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2527936'
    label: secalert@redhat.com
  - url: >-
      https://gitlab.freedesktop.org/gstreamer/gstreamer-security/-/merge_requests/120
    label: secalert@redhat.com
  - url: >-
      https://gitlab.freedesktop.org/gstreamer/gstreamer/-/blob/main/subprojects/gst-plugins-base/gst-libs/gst/rtsp/gstrtspmessage.c#L1408
    label: secalert@redhat.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-85150.json
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-85150'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-85150'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.0053
epssPercentile: 0.4257
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-03T12:33:40.281754Z'
ingestedAt: '2026-09-14T15:23:07.465Z'
patched:
  - enterprise_linux_appstream_v_10
  - enterprise_linux_appstream_v_8
  - enterprise_linux_appstream_v_9
---

## Overview

A NULL pointer dereference flaw was found in GStreamer's RTSP support library. The vulnerability occurs while parsing an Authorization or WWW-Authenticate header that uses Digest authentication. Specially crafted whitespace placement around a parameter's 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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **RHSA-2026:66460** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10) · released 2026-09-11 · [advisory](https://access.redhat.com/errata/RHSA-2026:66460)
- **RHSA-2026:67145** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 8) · released 2026-09-14 · [advisory](https://access.redhat.com/errata/RHSA-2026:67145)
- **RHSA-2026:69100** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9) · released 2026-09-21 · [advisory](https://access.redhat.com/errata/RHSA-2026:69100)
- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 7 · no fix planned: Red Hat Enterprise Linux 7 · updated 2026-09-21 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-85150.json)