CVE-2026-52718: Gstreamer1-plugins-bad-free: gstreamer: denial of service via av1 tile_list_obu parser byte/bit confusion

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-15 · updated 2026-07-30
Weakness: CWE-617

Description

A denial of service vulnerability was found in GStreamer's AV1 codec parser in gst-plugins-bad. The gst_av1_parser_parse_tile_list_obu() function passes a byte count to a bit-reader API that expects a bit count, causing parser desynchronization. A remote attacker could trick a user into opening a specially crafted AV1 media file, triggering an assertion abort and causing the application to crash.

Affected products

Red Hat Enterprise Linux 10: all versions — fixed in 0:1.26.7-2.el10_2.4
Red Hat Enterprise Linux 10.0 Extended Update Support: all versions — fixed in 0:1.24.11-3.el10_0.4
Red Hat Enterprise Linux 9: all versions — fixed in 0:1.22.12-7.el9_8.1
Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions: all versions — fixed in 0:1.18.4-9.el9_2.3
Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions: all versions — fixed in 0:1.22.1-6.el9_4.4
Red Hat Enterprise Linux 9.6 Extended Update Support: all versions — fixed in 0:1.22.12-5.el9_6.4

How to fix

Upgrade to a fixed version: Red Hat Enterprise Linux 10 0:1.26.7-2.el10_2.4; Red Hat Enterprise Linux 10.0 Extended Update Support 0:1.24.11-3.el10_0.4; Red Hat Enterprise Linux 9 0:1.22.12-7.el9_8.1; Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:1.18.4-9.el9_2.3; Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions 0:1.22.1-6.el9_4.4; Red Hat Enterprise Linux 9.6 Extended Update Support 0:1.22.12-5.el9_6.4. Check the vendor advisory for mitigations.

References

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