Out-of-bounds Read in Freedesktop Gst-Plugins-Good
CVE-2026-1940
An incomplete fix for CVE-2024-47778 allows an out-of-bounds read in gst_wavparse_adtl_chunk() function. The patch added a size validation check lsize + 8 > size, but it does not account for the GST_ROUND_UP_2(lsize) used in the actual offset calculation. When lsize is an odd number, the parser advances more bytes than validated, causing OOB read.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.1 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L.
EPSS exploit prediction
EPSS: 0.002 (11.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 12th percentile — 11.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Freedesktop Gst-Plugins-Good — versions 1.0.0
- Gstreamer
- Debian Linux — versions 11.0, 12.0
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat Enterprise Linux — versions 7.0, 8.0, 9.0
Weakness classification (CWE)
References
- access.redhat.com/security/cve/CVE-2026-1940 (vdb-entry, Vendor Advisory)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking, Issue Tracking, Vendor Advisory)
- gitlab.freedesktop.org/gstreamer/gstreamer/-/issues/4854 (Broken Link)
- gstreamer.freedesktop.org/security/sa-2026-0001.html (Vendor Advisory)
- security-tracker.debian.org/tracker/CVE-2026-1940 (Third Party Advisory)
Frequently asked questions
- What is CVE-2026-1940?
- CVE-2026-1940 is a medium-severity vulnerability in Freedesktop Gst-Plugins-Good, classified under Out-of-bounds Read. CVSS score: 5.1/10. Published 2026-03-23.
- How severe is CVE-2026-1940?
- Medium severity. CVSS v3 base score is 5.1 out of 10.