Vulnerability · Published Jun 11, 2026 · Assigned by redhat
CVE-2026-53701Gstreamer1-plugins-bad-free: gstreamer: out-of-bounds write in h.266/vvc pps picture partition parser
Medium 6.5
In plain English
A medium-severity out-of-bounds write in Red Hat Enterprise Linux 10 from Red Hat. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 11% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:13 | gst-plugins-bad1.0 | 1.26.2-3+deb13u2 | DEBIAN-CVE-2026-53701 |
| Debian:14 | gst-plugins-bad1.0 | 1.28.3-1 | DEBIAN-CVE-2026-53701 |
| Ubuntu:25.10 | gst-plugins-bad1.0 | no fix listed | UBUNTU-CVE-2026-53701 |
| Ubuntu:26.04:LTS | gst-plugins-bad1.0 | 1.28.2-1ubuntu1.1 | UBUNTU-CVE-2026-53701 |
| Ubuntu:26.04:LTS | gst-plugins-bad1.0 | 1.28.2-1ubuntu1.1 | USN-8446-1 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | see references |
| Red Hat | Red Hat Enterprise Linux 7 | see references |
| Red Hat | Red Hat Enterprise Linux 8 | see references |
| Red Hat | Red Hat Enterprise Linux 9 | see references |
Weakness: CWE-787 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
References
- https://access.redhat.com/security/cve/CVE-2026-53701 vdb-entry, x_refsource_REDHAT
- RHBZ#2487611 issue-tracking, x_refsource_REDHAT