Red Hat Enterprise Linux AIOpenShift AI TDSC tdsc_load_cursor heap-based overflow

Summaryinfo

A vulnerability classified as problematic was found in Red Hat Enterprise Linux AIOpenShift AI. This affects the function tdsc_load_cursor of the component TDSC Handler. Such manipulation leads to heap-based overflow. This vulnerability is uniquely identified as CVE-2026-18393. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability was found in Red Hat Enterprise Linux AIOpenShift AI (version unknown) and classified as problematic. Affected by this issue is the function tdsc_load_cursor of the component TDSC Handler. The manipulation with an unknown input leads to a heap-based overflow vulnerability. Using CWE to declare the problem leads to CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). Impacted is integrity, and availability. CVE summarizes:

A flaw was found in FFmpeg. The tdsc_load_cursor() function writes beyond the bounds of a heap-allocated buffer when processing crafted TDSC cursor data. A remote attacker could exploit this by supplying a specially crafted video file, potentially leading to a denial of service or arbitrary code execution.

The advisory is available at access.redhat.com. This vulnerability is handled as CVE-2026-18393 since 07/30/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 08/28/2026).

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 AIOpenShift AI

License

• open-source

Website

• Vendor: https://www.redhat.com/

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