Red Hat Enterprise Linux Tracepoint Upload stack-based overflow

Summaryinfo

A vulnerability identified as critical has been detected in Red Hat Enterprise Linux. Affected by this issue is some unknown functionality of the component Tracepoint Upload Handler. The manipulation leads to stack-based overflow. This vulnerability is documented as CVE-2026-121995. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in Red Hat Enterprise Linux (affected version not known). It has been rated as critical. This issue affects some unknown functionality of the component Tracepoint Upload Handler. The manipulation with an unknown input leads to a stack-based overflow vulnerability. Using CWE to declare the problem leads to CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). Impacted is confidentiality, integrity, and availability. The summary by CVE is:

A stack buffer overflow in the GDB client's tracepoint upload handler allows an attacker-controlled debug stub to corrupt stack memory automatically during connection setup. The overflow results from GDB reading beyond the current reply boundary into a stale prior reply in the shared packet buffer.

It is possible to read the advisory at access.redhat.com. The identification of this vulnerability is CVE-2026-121995 since 11/04/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful 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.

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

License

• commercial

Website

• Vendor: https://www.redhat.com/

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