Red Hat Enterprise Linux 7/8/9/10 gst-plugins-bad uninitialized pointer

Summaryinfo

A vulnerability marked as critical has been reported in Red Hat Enterprise Linux 7/8/9/10. The impacted element is an unknown function of the component gst-plugins-bad. Performing a manipulation results in uninitialized pointer. This vulnerability was named CVE-2026-121611. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability classified as critical has been found in Red Hat Enterprise Linux 7/8/9/10. This affects an unknown code of the component gst-plugins-bad. The manipulation with an unknown input leads to a uninitialized pointer vulnerability. CWE is classifying the issue as CWE-824. The product accesses or uses a pointer that has not been initialized. This is going to have an impact on availability. The summary by CVE is:

A flaw was found in GStreamer's gst-plugins-bad package. A use of uninitialized memory vulnerability exists in the H.265 (HEVC) bitstream parser when processing Video Parameter Sets that declare more than one HRD (Hypothetical Reference Decoder) parameter set. A remote attacker could exploit this by providing a crafted H.265 media file or stream that, when processed by an application using GStreamer, causes unpredictable parser behavior and may crash the application. This can lead to a denial of service for any application using GStreamer to play back H.265 content.

It is possible to read the advisory at access.redhat.com. This vulnerability is uniquely identified as CVE-2026-121611 since 11/03/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 11/09/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• Operating System

Vendor

• Red Hat

Name

• Enterprise Linux

Version

• 7
• 8
• 9
• 10

License

• commercial

Website

• Vendor: https://www.redhat.com/

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