High severity · published Mar 23, 2026
CVE-2026-1940
Gstreamer: incomplete fix of cve-2026-1940
7.5
CVSS
0.2%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 14% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
RH
Red Hat Enterprise Linux 10 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 6 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 7 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 8 · Red Hat
All versions, or not specified · source: vendor
RH
Red Hat Enterprise Linux 9 · Red Hat
All versions, or not specified · source: vendor
DL
Debian Linux · Debian
11.0; 12.0 · source: NVD
EL
Enterprise Linux · Redhat
7.0; 8.0; 9.0; 10.0 · source: NVD
GS
Gst-plugins-good · Freedesktop
1.0.0 · source: NVD
GS
Gstreamer · Gstreamer
before 1.28.1 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-1940
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-1940
Vendor Advisory
https://access.redhat.com/security/cve/CVE-2026-1940
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=2436932
Broken Link
https://gitlab.freedesktop.org/gstreamer/gstreamer/-/issues/4854
Vendor Advisory
https://gstreamer.freedesktop.org/security/sa-2026-0001.html
Third Party Advisory
https://security-tracker.debian.org/tracker/CVE-2026-1940
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