Red Hat Enterprise Linux m17n-lib stack-based overflow

Summaryinfo

A vulnerability was found in Red Hat Enterprise Linux. It has been rated as problematic. Affected is an unknown function of the component m17n-lib. The manipulation leads to stack-based overflow. This vulnerability is referenced as CVE-2026-109854. The attack can only be performed from a local environment. No exploit is available.

Detailsinfo

A vulnerability was found in Red Hat Enterprise Linux (version unknown) and classified as problematic. This issue affects an unknown function of the component m17n-lib. 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. The summary by CVE is:

A flaw was found in m17n-lib. An attacker who supplies crafted input to an application processing ISO-2022 encoded text can cause the library to read uninitialized memory from the stack. If the application exposes or returns the decoded output, this flaw can result in unexpected behavior and limited information disclosure.

It is possible to read the advisory at access.redhat.com. The identification of this vulnerability is CVE-2026-109854 since 10/13/2026. The exploitation is known to be easy. Attacking locally is a requirement. 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 10/13/2026).

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

License

• commercial

Website

• Vendor: https://www.redhat.com/

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