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VulnerabilityPublished

CVE-2026-125040: Red Hat Enterprise Linux 10 · ReDoS

Affects Red Hat Enterprise Linux 10Source CVE Database V5

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Not known to be exploited · CVSS 6.5 Medium · fixed in Red Hat Enterprise Linux 10 package updates : update Red Hat Enterprise Linux 10 when convenient.

Data as of 9 Nov 2026, 18:35 UTC

CVSS 3.1 base score
6.5Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (redhat)CVSS 3.16.5
Patch
Available – fixed in 1.28.2
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 9 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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

ProductAffectedFixed in
Red Hat Enterprise Linux 10gstreamer1-plugins-baseAffected–Fixed in–
Red Hat Enterprise Linux 7gstreamer1-plugins-baseAffected–Fixed in–
Red Hat Enterprise Linux 8gstreamer1-plugins-baseAffected–Fixed in–
Red Hat Enterprise Linux 9gstreamer1-plugins-baseAffected–Fixed in–

AI-suggested

Update gst-plugins-base to version 1.28.2 or later to apply the official fix. If updating is not possible immediately, mitigate by preventing automatic selection of the subparse element (e.g., set GST_PLUGIN_FEATURE_RANK=subparse:NONE) in applications that do not require untrusted SRT/WebVTT subtitles.

Description

CVE-2026-125040 is a vulnerability in the SRT and WebVTT subtitle parser of GStreamer's gst-plugins-base component used in Red Hat Enterprise Linux 10. The flaw involves inefficient regular expression processing that can cause quadratic CPU usage when parsing crafted subtitle cues with long unmatched markup-like text. This can lead to denial of service by making GStreamer-based applications unresponsive. The issue is fixed in gst-plugins-base version 1.28.2.

References

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