CVE-2026-53701

An out-of-bounds write vulnerability was found in GStreamer's H.266/VVC PPS picture partition parser in gst-plugins-bad. In the multi-slice-in-tile processing of gst_h266_parser_parse_picture_partition() (gsth266parser.c), the loop iterates without checking that the slice index stays within bounds, writing past three fixed-size arrays (slice_height_in_ctus, slice_top_left_ctu_x, slice_top_left_ctu_y) in the GstH266PPS structure. While the initial proof-of-concept demonstrated a 4-byte out-of-bounds write, the code permits larger writes across multiple iterations. A crafted H.266/VVC media file can trigger this vulnerability.

Score

CVSS 3.1 6.5 Medium

Status

Awaiting Analysis - secalert@redhat.com

Published

2026-06-11

Last modified

2026-06-15

Weaknesses

CWE-787

Affected products

• Enterprise Linux (Redhat)

References

• https://access.redhat.com/security/cve/CVE-2026-53701
• https://bugzilla.redhat.com/show_bug.cgi?id=2487611