Samsung Devices PROCA trustlet stack-based overflow

Summaryinfo

A vulnerability marked as very critical has been reported in Samsung Devices. The impacted element is an unknown function of the component PROCA trustlet. The manipulation leads to stack-based overflow. This vulnerability is listed as CVE-2026-21093. The attack must be carried out locally. There is no available exploit.

Detailsinfo

A vulnerability, which was classified as very critical, has been found in Samsung Devices (the affected version is unknown). This issue affects an unknown code of the component PROCA trustlet. 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:

Stack-based buffer overflow in PROCA trustlet prior to SMR Sep-2026 Release 1 allows local privileged attackers to write out-of-bounds memory.

The advisory is shared at security.samsungmobile.com. The identification of this vulnerability is CVE-2026-21093 since 12/11/2025. The exploitation is known to be easy. An attack has to be approached locally. Additional levels of successful authentication are necessary for exploitation. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/09/2026).

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

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

• Samsung

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• Devices

License

• commercial

Website

• Vendor: https://www.samsung.com/

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