CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HCVE-2026-125704 Gstreamer: gstreamer: use-after-free in gstreamer core buffer value deserialization
High (7.5) in red hat. EPSS 0.5% estimated probability of exploitation activity in the next 30 days.
On this page
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.
Severity
- EPSS
- 0.5% estimated probability of exploitation activity in the next 30 days; 45th percentile. Scored 2026-11-13. A forecast for this CVE across the internet, not for your own systems.
- CISA's assessment (SSVC)
- Exploitation: none · Automatable: yes · Technical impact: partial, assessed 2026-11-12. From CISA's Vulnrichment in the CVE List: whether it is exploited, whether exploiting it can be automated, and how much control it gives.
- CWE
- CWE-416 Use After Free
- Published
- Modified
- Assigned by
- redhat (CNA)
- NVD analysis
- Awaiting analysis
- Record from
- the NVD, synced
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Affected
- red hat:red hat enterprise linux 10
- red hat:red hat enterprise linux 7
- red hat:red hat enterprise linux 8
- red hat:red hat enterprise linux 9
Versions
From the CNA's record in the CVE List.
Fixed in
| Product | Fixed in |
|---|---|
| Red Hat Enterprise Linux 10 | 0:1.26.7-5.el10_3.1 |
| Red Hat Enterprise Linux 8 | 0:1.16.1-3.el8_10 |
| Red Hat Enterprise Linux 9 | 0:1.22.12-3.el9_9.1 |
Fix and patched versions
- Red Hat Red Hat Enterprise Linux 10: fixed in 0:1.26.7-5.el10_3.1
- Red Hat Red Hat Enterprise Linux 8: fixed in 0:1.16.1-3.el8_10
- Red Hat Red Hat Enterprise Linux 9: fixed in 0:1.22.12-3.el9_9.1
- Debian, Red Hat, AlmaLinux, Rocky Linux: fixed package versions per release
Linux distributions
| Distribution | Release | Package | Fixed in | Advisory |
|---|---|---|---|---|
| Debian | 12, 13 | gstreamer1.0 | no fix listed | DEBIAN-CVE-2026-125704 |
| Debian | 14 | gstreamer1.0 | 1.28.3-1 | DEBIAN-CVE-2026-125704 |
| Ubuntu | 18.04:LTS, 20.04:LTS, 22.04:LTS and 3 more | gstreamer1.0 | no fix listed | UBUNTU-CVE-2026-125704 |
| Red Hat | enterprise_linux:8::appstream | gstreamer1, gstreamer1-devel, gstreamer1-debuginfo and 1 more | 0:1.16.1-3.el8_10 | RHSA-2026:99090 |
| Red Hat | enterprise_linux:9::appstream | gstreamer1, gstreamer1-devel, gstreamer1-debuginfo and 1 more | 0:1.22.12-3.el9_9.1 | RHSA-2026:99228 |
| Red Hat | enterprise_linux:10.3 | gstreamer1, gstreamer1-devel, gstreamer1-debuginfo and 1 more | 0:1.26.7-5.el10_3.1 | RHSA-2026:99129 |
| AlmaLinux | 8 | gstreamer1, gstreamer1-devel | 1.16.1-3.el8_10 | ALSA-2026:99090 |
| Rocky Linux | 8 | gstreamer1, gstreamer1-devel, gstreamer1-debuginfo and 1 more | 0:1.16.1-3.el8_10 | RLSA-2026:99090 |
| Rocky Linux | 9 | gstreamer1, gstreamer1-devel, gstreamer1-debuginfo and 1 more | 0:1.22.12-3.el9_9.1 | RLSA-2026:99228 |
| Rocky Linux | 10 | gstreamer1, gstreamer1-devel, gstreamer1-debuginfo and 1 more | 0:1.26.7-5.el10_3.1 | RLSA-2026:99129 |
From the distributions' data via OSV.dev: the Debian Security Tracker; Ubuntu Security Notices © Canonical Ltd., CC BY-SA 4.0; Red Hat Security Data © Red Hat, Inc., CC BY 4.0; AlmaLinux's OSV database, MIT; Rocky Linux's errata, BSD-3-Clause. Modified: reformatted and linked to CVE records. Credits. On the distributions' own pages: Debian · Ubuntu · Red Hat.
Red Hat
Red Hat rates this Important.
This vulnerability is rated Important under the current OSIM vector because an unauthenticated network-facing GDP receiver can reach the GStreamer buffer-value deserializer, and a use-after-free may terminate the receiver. A Fedora 43 VM confirmed the freed-buffer read through local direct-API and typed-caps paths, but neither path crashed or produced disclosure or code execution. The GDP network route and High availability outcome remain unverified dynamically. Product exposure depends on applications parsing untrusted caps or structure strings.
There is no complete mitigation for applications that continue to deserialize untrusted GStreamer caps or structure strings. Restrict access to network-facing GStreamer Data Protocol receivers to trusted peers, and avoid passing externally supplied strings to gst_caps_from_string() or gst_structure_from_string() until an update is available. These measures reduce exposure only where the application can control those input paths.
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 8 | gstreamer1-0:1.16.1-3.el8_10 | Fixed 2026-11-11 | RHSA-2026:99090 |
| Red Hat Enterprise Linux 10 | gstreamer1 | Affected | |
| Red Hat Enterprise Linux 7 | gstreamer1 | Affected | |
| Red Hat Enterprise Linux 9 | gstreamer1 | Affected |
Contains Red Hat Security Data © Red Hat, Inc., licensed under CC BY 4.0. Source: https://access.redhat.com/security/data. Modified: reformatted. Red Hat's page for CVE-2026-125704.
References
- https://access.redhat.com/errata/RHSA-2026:99090
- https://access.redhat.com/errata/RHSA-2026:99129
- https://access.redhat.com/errata/RHSA-2026:99228
- https://access.redhat.com/security/cve/CVE-2026-125704
- https://bugzilla.redhat.com/show_bug.cgi?id=2569128
- https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/11583.patch
- https://gstreamer.freedesktop.org/security/sa-2026-0028.html