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Vulnerability record · CVE-2026-1940 · published 23 March 2026

CVE-2026-1940: Freedesktop gst-plugins-good out-of-bounds read vulnerability

Freedesktop · Gst Plugins Good

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.

7.5 CVSS 3.1 High EPSS 0.22% · top 88.2% CWE-125 · Out-of-bounds read
7.5CVSS 3.1 base score
0.22%EPSS exploitation probability, 30 days
NoNot in CISA KEV
4Affected product versions listed by NVD
5References
17 Jun 2026Last modified by NVD

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

Affected products

4 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Source: NIST National Vulnerability Database (record CVE-2026-1940), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.