CVE-2026-1940 Gstreamer: incomplete fix of cve-2026-1940

What is CVE-2026-1940?

CVE-2026-1940 is a medium-severity memory corruption vulnerability in Debian Debian Linux, published on 23 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official 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.

Weakness: CWE-125

Which versions are affected by CVE-2026-1940?

It affects 4 products.

Products include Debian Debian Linux, Freedesktop Gst-Plugins-Good, Gstreamer Gstreamer, Redhat Enterprise Linux.

How do I fix CVE-2026-1940?

Apply the vendor's patch.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2026-1940 being exploited?

There is no known exploitation of CVE-2026-1940 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

• CVE-2015-3306 ProFTPD Improper Access Control Exploited Critical 10.0
• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2026-1940, ECHO-abfa-bd9c-1987, GHSA-9wvw-r6fm-6wwv, MINI-cr82-wr44-93qx, OESA-2026-2146, UBUNTU-CVE-2026-1940.