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Fencer Intel
high 7.5

CVE-2026-125704 json

Gstreamer: gstreamer: use-after-free in gstreamer core buffer value deserialization

published yesterday modified 4h ago also EUVD-2026-120866

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 42%
public exploits
0
none known

Summary

A use-after-free flaw was found in GStreamer core buffer value deserialization. When serialized buffer text contains an invalid character, an error path frees a mapped buffer before unmapping it. Applications that parse untrusted caps or structure data can reach a freed-buffer read and may crash. A network-facing GStreamer Data Protocol receiver can process such caps data without user interaction; further impact has not been established.

Patch / fix

  • Red Hat Red Hat Enterprise Linux 10 0:1.26.7-5.el10_3.1
  • Red Hat Red Hat Enterprise Linux 8 0:1.16.1-3.el8_10
  • Red Hat Red Hat Enterprise Linux 9 0:1.22.12-3.el9_9.1
  • gstreamer1.0 Debian 14 1.28.3-1

debian advisories DEBIAN-CVE-2026-125704

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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-2026-125704 updated cvss 7.5

gstreamer: gstreamer: Use-after-free in GStreamer core buffer value deserialization

  • Red Hat Enterprise Linux 7 gstreamer1
    affected: workaround, no fix available
  • Red Hat Enterprise Linux AppStream (v. 8) gstreamer1 1.16.1-3.el8_10
    fixed: vendor fix RHSA-2026:99090
  • Red Hat Enterprise Linux AppStream (v. 9) gstreamer1 1.22.12-3.el9_9.1
    fixed: vendor fix RHSA-2026:99228
  • Red Hat Enterprise Linux AppStream (v. 10) gstreamer1 1.26.7-5.el10_3.1
    fixed: vendor fix RHSA-2026:99129

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

Exploit prediction

0.48% chance of exploitation in the next 30 days, higher than 42% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by version score vector
CNA 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 8
  • Red Hat Red Hat Enterprise Linux 9
  • Red Hat Red Hat Enterprise Linux 7

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.