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Vulnerability record · CVE-2026-2923 · published 16 March 2026

CVE-2026-2923: Gstreamer out-of-bounds write vulnerability

Gstreamer · Gstreamer

GStreamer DVB Subtitles Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GStreamer. Interaction with this library is required to exploit this vulnerability but attack vectors may vary depending on the implementation. The specific flaw exists within the handling of coordinates. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-28838.

7.8 CVSS 3.1 High EPSS 0.34% · top 75.2% CWE-787 · Out-of-bounds write
7.8CVSS 3.1 base score
0.34%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
12References
21 Jul 2026Last modified by NVD

Description

GStreamer DVB Subtitles Out-Of-Bounds Write Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of GStreamer. Interaction with this library is required to exploit this vulnerability but attack vectors may vary depending on the implementation. The specific flaw exists within the handling of coordinates. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-28838.

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

Affected products

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

References

LinkTags
https://gitlab.freedesktop.org/gstreamer/gstreamer/-/commit/3b8253f447bcc9831dbf643d2c69b205fedbe086 PatchVendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-26-161/ Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:19024
https://access.redhat.com/errata/RHSA-2026:19180
https://access.redhat.com/errata/RHSA-2026:6259
https://access.redhat.com/errata/RHSA-2026:6300
https://access.redhat.com/errata/RHSA-2026:6750
https://access.redhat.com/errata/RHSA-2026:8854
https://access.redhat.com/errata/RHSA-2026:8862
https://access.redhat.com/security/cve/CVE-2026-2923
https://bugzilla.redhat.com/show_bug.cgi?id=2447503
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-2923.json

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-2923), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.