7.8

CVE-2026-2923: gstreamer Out-of-bounds Write

CVSS: 7.8v3.1HighModified
AliasesUBUNTU-CVE-2026-2923DEBIAN-CVE-2026-2923
Published 13-03-2026Last modified 21-07-2026
Open JSON

Vulnerability summary

CVE-2026-2923 is a high (CVSS 7.8) Out-of-bounds Write vulnerability in gstreamer. EPSS estimates a 0.35% chance of exploitation in the next 30 days, higher than 27.5% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.35%
0%100%
Low · -0.38 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 8
MGASA-2026-0222RHSA-2026:19024RHSA-2026:19180RHSA-2026:6259RHSA-2026:6300RHSA-2026:6750

Timeline

  1. 13-03-2026
    PublishedVulnerability first disclosed.
  2. 21-07-2026
    Last modifiedVulnerability information updated.

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 metrics

7 scores · 4 sources · 2 versions

EPSS trend

Probability

0.35%

Chance of exploitation in the next 30 days

Percentile

28%

Versus all other CVEs

30-day change

-0.38 pp

From 0.73% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.35%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • gst-plugins-bad1.0< 1.22.0-4+deb12u7 | < 1.26.2-3+deb13u1 | < 1.28.1-1
Gstreamer1 product
  • gstreamer1c6e163aa33962f5ee4a87d29319ccdd5cb67612 | < 1.28.1
Ubuntu1 product
  • gst-plugins-bad1.0All versions (No fix recorded)

3 vendors · 3 products

References

16 links
Show all 16 references