Executive brief
Samsung Escargot, an open-source JavaScript engine often used in smart TVs and appliances, contains a memory management flaw. If a user is tricked into running a malicious script, the engine could crash or behave unpredictably, potentially impacting the stability of the device. This vulnerability primarily affects the availability of the service rather than the confidentiality of user data.
Technical details
A stack-based buffer overflow (CWE-121) exists in Samsung's Escargot JavaScript engine due to improper handling of labeled 'continue' statements within various loop structures (For, ForIn, ForOf, While, and DoWhile). The root cause involves a failure to correctly manage environment record unwinding and iterator cleanup when a labeled continue crosses allocated block boundaries. An attacker can exploit this by providing a specially crafted JavaScript file that triggers an environment record mismatch or improper stack state, leading to a crash (DoS) or potentially limited integrity impact. The vulnerability requires local execution or user interaction to run the malicious script. A fix has been merged into the master branch in commit b30b63fc63b403907d8137da1c65aaa4521fe74e.
Affected products
- Samsung Escargot before b30b63fc63b403907d8137da1c65aaa4521fe74e
Timeline
- 2026-06-15: other: Fix developed and submitted via pull request
- 2026-06-16: patched: Fix merged into master branch
- 2026-07-09: disclosed: CVE published to NVD