What’s Vulnerable › Vulnerabilities

CVE-2026-17072: Gstreamer1-plugins-good: gst-plugins-good: 4-byte heap over-read in gst_matroska_parse_flac_stream_headers when parsing flac codec data in matroska containers

• Severity: low (CVSS 3.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-28 · updated 2026-07-28
• Weakness: CWE-125

Description

A flaw was found in GStreamer's gst-plugins-good. A heap-based out-of-bounds read of 4 bytes can occur when parsing FLAC audio stream headers embedded in a Matroska or WebM container file. The vulnerability is triggered by a boundary check that does not account for the full size of the data being copied, allowing a small read past the end of the allocated buffer. An attacker could exploit this by crafting a malicious Matroska or WebM file and tricking a user into opening it, potentially leaking a small amount of adjacent heap memory.

Affected products

• Red Hat Enterprise Linux 10: all versions
• Red Hat Enterprise Linux 6: all versions
• Red Hat Enterprise Linux 7: all versions
• Red Hat Enterprise Linux 8: all versions
• Red Hat Enterprise Linux 9: all versions

References

• https://access.redhat.com/security/cve/CVE-2026-17072
• https://bugzilla.redhat.com/show_bug.cgi?id=2506750
• https://gitlab.freedesktop.org/gstreamer/gstreamer-security/-/merge_requests/111

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