# CVE-2026-1940: gst-plugins-good1.0: An incomplete fix for CVE-2024-47778 allows an out-of-bounds read in gst_wavparse_adtl_chunk() function

CVE-2026-1940 is fixed in 6 products on 1 platform, first by DEBIAN-CVE-2026-1940, released March 23, 2026. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2026-1940
- Priority: High
- CVSS: 7.5 (high)
- EPSS: 0.0023
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Mar 23, 2026

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | gst-plugins-good1.0 Debian 12.15 (bookworm) | 1.22.0-5+deb12u4 | [DEBIAN-CVE-2026-1940](https://patchblox.com/security/data/fix/linux/debian-cve-2026-1940.md) | Mar 23, 2026 |
| Linux | gst-plugins-good1.0 Debian 13.5 (trixie) | 1.26.2-1+deb13u2 | [DEBIAN-CVE-2026-1940](https://patchblox.com/security/data/fix/linux/debian-cve-2026-1940.md) | Mar 23, 2026 |
| Linux | gst-plugins-good1.0 Debian 14 | 1.28.1-1 | [DEBIAN-CVE-2026-1940](https://patchblox.com/security/data/fix/linux/debian-cve-2026-1940.md) | Mar 23, 2026 |
| Linux | gstreamer1-plugins-good amzn 2023 | 1.24.10-1.amzn2023.0.5 | [ALAS2023-2026-1579](https://patchblox.com/security/data/fix/linux/alas2023-2026-1579.md) | Apr 13, 2026 |
| Linux | gstreamer1-plugins-good-debuginfo amzn 2023 | 1.24.10-1.amzn2023.0.5 | [ALAS2023-2026-1579](https://patchblox.com/security/data/fix/linux/alas2023-2026-1579.md) | Apr 13, 2026 |
| Linux | gstreamer1-plugins-good-debugsource amzn 2023 | 1.24.10-1.amzn2023.0.5 | [ALAS2023-2026-1579](https://patchblox.com/security/data/fix/linux/alas2023-2026-1579.md) | Apr 13, 2026 |
| Linux | gstreamer1-plugins-good-gtk amzn 2023 | 1.24.10-1.amzn2023.0.5 | [ALAS2023-2026-1579](https://patchblox.com/security/data/fix/linux/alas2023-2026-1579.md) | Apr 13, 2026 |
| Linux | gstreamer1-plugins-good-gtk-debuginfo amzn 2023 | 1.24.10-1.amzn2023.0.5 | [ALAS2023-2026-1579](https://patchblox.com/security/data/fix/linux/alas2023-2026-1579.md) | Apr 13, 2026 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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