CVE-2026-52721 Gstreamer1-plugins-bad-free: gstreamer: multiple out-of-bounds reads in pcapparse ipv4/tcp header parsing
A local attacker can cause crashes or leak memory by tricking a user into opening a malicious PCAP file in GStreamer's pcapparse element.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-52721?
CVE-2026-52721 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, published on 15 Jun 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
Multiple out-of-bounds read vulnerabilities were found in GStreamer's pcapparse element. Malformed PCAP records can trigger reads beyond buffer boundaries during IPv4/TCP header parsing. This element is primarily used in debugging pipelines, limiting real-world exposure. A local attacker could trick a user into processing a specially crafted PCAP file, potentially leading to a crash or information disclosure.
Weakness: CWE-125
Which versions are affected by CVE-2026-52721?
How do I fix CVE-2026-52721?
Apply the vendor's patch.
Is CVE-2026-52721 being exploited?
There is no known exploitation of CVE-2026-52721 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-52721, ECHO-3756-c3c5-31e0, GHSA-9qf3-vv3w-6xw5, UBUNTU-CVE-2026-52721.