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CVE-2026-1940

Gstreamer: incomplete fix of cve-2026-1940

Published: Mar 23, 2026Updated: May 4, 2026 Sources: CVE List NVDCWE-125
NVD MITRE
5.1CVSSMEDIUM
EPSS Score
0.2%
Top 87.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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 Breakdown

AV:LAC:LPR:NUI:NS:UC:NI:LA:L
Exploitability
AV:LAttack Vector
Local
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:LIntegrity
Low
A:LAvailability
Low
Open in CVSS calculator →

Weaknesses

CWE-125

Affected Products

gst-plugins-goodfreedesktopOSS Libraries
gstreamergstreamer
LibraryLibrary
OSS Libraries / generic-library
debian linuxdebian
On-premOS
Operating Systems / linux-distro
enterprise linuxredhat
On-premOS
Operating Systems / linux-distro
Red Hat Enterprise Linux 10Red Hat
On-premOS
Operating Systems / linux-distro
freedesktoposs-projectOSS Librariesaka freedesktop.org
gstreameross-projectOSS Librariesaka good plug-ins, plug-ins
debianoss-projectGBOperating Systemsaka debian gnu/linux
redhatcommercialUSOperating Systemsaka red hat
red hatcommercialUSOperating Systemsaka red hat
and 4 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

1 technique
Collection
View detailed technique mapping

References

https://access.redhat.com/security/cve/CVE-2026-1940
access.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2436932
bugzilla.redhat.com
https://gitlab.freedesktop.org/gstreamer/gstreamer/-/issues/4854
gitlab.freedesktop.org
and 2 more references View all →

Timeline

Published
Mar 23, 2026
Last Updated
May 4, 2026

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