CVE-2026-125704: Red Hat Enterprise Linux 10 · Use After Free
Affects Red Hat Enterprise Linux 10Source CVE Database V5
Not known to be exploited · CVSS 7.5 High · fixed in Red Hat Enterprise Linux 10 package updates : patch Red Hat Enterprise Linux 10 soon.
Data as of 10 Nov 2026, 10:49 UTC
Thin evidence
One scorer or none| CNA (redhat) | CVSS 3.1 | 7.5 |
|---|
- Patch
- Available – fixed in 10.4
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 10 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 9 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Red Hat Enterprise Linux 10gstreamer1 | Affected– | Fixed in– |
| Red Hat Enterprise Linux 7gstreamer1 | Affected– | Fixed in– |
| Red Hat Enterprise Linux 8gstreamer1 | Affected– | Fixed in– |
| Red Hat Enterprise Linux 9gstreamer1 | Affected– | Fixed in– |
AI-suggested
A fix is available in Red Hat Enterprise Linux 10.4 and later versions, as well as Fedora 44 and Fedora Rawhide. For affected versions, there is no complete mitigation other than restricting access to network-facing GStreamer Data Protocol receivers to trusted peers and avoiding passing externally supplied strings to gst_caps_from_string() or gst_structure_from_string() until updates are applied. Users should upgrade to fixed versions to fully remediate the vulnerability.
Description
CVE-2026-125704 is a use-after-free vulnerability in the GStreamer core buffer value deserialization component affecting Red Hat Enterprise Linux 10 and other Red Hat versions. The flaw occurs when crafted serialized buffer data containing an invalid character triggers an error path that frees a mapped buffer before unmapping it. This can cause applications parsing untrusted caps or structure data to crash. A network-facing GStreamer Data Protocol receiver can be exploited without user interaction. No further impact beyond process termination has been established.