QuickJS-NG before 0.16.0 contains an integer overflow in jsproxygetownpropertynames() in quickjs.c that causes a heap buffer overflow on 32-bit hosts. Attackers running JavaScript can return a large array-like object from a Proxy ownKeys trap to wrap the allocation size, causing crashes or potential code execution.

QuickJS-NG before 0.16.0 contains an integer overflow in jstypedarraysort() in quickjs.c that allows attackers to cause a heap buffer overflow on 32-bit hosts. Attackers who can run JavaScript can call TypedArray.prototype.sort with a comparator on a typed array near 2^30 elements, wrapping the allocation size and writing indices past the buffer to crash or potentially execute code.

An issue in QuickJS-NG v.0.12.1 allows an attacker to execute arbitrary code via the jsmappedargumentsmark function

QuickJS-NG before 0.16.0 contains a memory leak vulnerability in jsatomicsstore() in quickjs.c that fails to free the converted value when returning a RangeError. Attackers running JavaScript can repeatedly call Atomics.store with a valueOf that detaches or shrinks the buffer to exhaust heap memory and cause denial of service.