CVE-2026-1940 — MEDIUM (5.1)

Vulnerability Description

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.

CVSS Score

5.1

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

LOW

Availability

LOW

Affected Products

Vendor	Product	Versions
Freedesktop	Gst-Plugins-Good	1.0.0
Gstreamer	Gstreamer	< 1.28.1
Debian	Debian Linux	11.0
Redhat	Enterprise Linux	7.0

Related Weaknesses (CWE)

CWE-125

References

https://access.redhat.com/security/cve/CVE-2026-1940Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2436932Issue TrackingVendor Advisory
https://gitlab.freedesktop.org/gstreamer/gstreamer/-/issues/4854Broken Link
https://gstreamer.freedesktop.org/security/sa-2026-0001.htmlVendor Advisory
https://security-tracker.debian.org/tracker/CVE-2026-1940Third Party Advisory

FAQ

What is CVE-2026-1940?

CVE-2026-1940 is a vulnerability with a CVSS score of 5.1 (MEDIUM). 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_R...

How severe is CVE-2026-1940?

CVE-2026-1940 has been rated MEDIUM with a CVSS base score of 5.1/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-1940?

Check the references section above for vendor advisories and patch information. Affected products include: Freedesktop Gst-Plugins-Good, Gstreamer Gstreamer, Debian Debian Linux, Redhat Enterprise Linux.