Skip to content
Fencer Intel
medium 5.1

CVE-2026-1940 json

Gstreamer: incomplete fix of cve-2026-1940

published 7mo ago modified 4d ago also EUVD-2026-14551

cvss
5.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 15%
public exploits
0
none known

Summary

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.

Patch / fix

  • gstreamer gstreamer 1.28.1
  • gst-plugins-good1.0 Debian 12 1.22.0-5+deb12u4
  • gst-plugins-good1.0 Debian 13 1.26.2-1+deb13u2
  • gst-plugins-good1.0 Debian 14 1.28.1-1

debian advisories DEBIAN-CVE-2026-1940

Is CVE-2026-1940 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-1940 updated cvss 5.1

gstreamer: incomplete fix of CVE-2026-1940

  • Red Hat Enterprise Linux 6 gstreamer, gstreamer-tools
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 7 gstreamer, gstreamer1, gstreamer-tools Red Hat Enterprise Linux 8 gstreamer1, mingw32-gstreamer1, mingw64-gstreamer1 Red Hat Enterprise Linux 9 gstreamer1 Red Hat Enterprise Linux 10 gstreamer1
    affected: no fix available “Fix deferred”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
7mo ago

Exploit prediction

0.24% chance of exploitation in the next 30 days, higher than 15% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.1 5.1 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

  • Red Hat Red Hat Enterprise Linux 10
  • Red Hat Red Hat Enterprise Linux 6
  • Red Hat Red Hat Enterprise Linux 7
  • Red Hat Red Hat Enterprise Linux 8
  • Red Hat Red Hat Enterprise Linux 9

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.