CVE-2026-86547

mrubyc through 4.0.0 contains a null pointer dereference vulnerability in the openter handler in src/vm.c when processing untrusted bytecode. Attackers can craft malicious .mrb bytecode files with OPENTER instructions at the top level to crash the embedding application and cause denial of service...

CVE-2026-86547

mruby-c (mrubyc) through 4.0.0 contains a null pointer dereference in the op_enter() handler in src/vm.c when processing untrusted bytecode. An attacker can craft malicious .mrb bytecode files with OP_ENTER instructions at the top level to crash the embedding application, resulting in denial of s...

EUVD-2026-74787

mrubyc through 4.0.0 contains a null pointer dereference vulnerability in the openter handler in src/vm.c when processing untrusted bytecode. Attackers can craft malicious .mrb bytecode files with OPENTER instructions at the top level to crash the embedding application and cause denial of service...

CVE-2026-86547 mrubyc through 4.0.0 NULL Pointer Dereference via OP_ENTER

mrubyc through 4.0.0 contains a null pointer dereference vulnerability in the openter handler in src/vm.c when processing untrusted bytecode. Attackers can craft malicious .mrb bytecode files with OPENTER instructions at the top level to crash the embedding application and cause denial of service...

CVE-2018-12248

An issue was discovered in mruby 1.4.1. There is a heap-based buffer over-read associated with OPENTER because mrbgems/mruby-fiber/src/fiber.c does not extend the stack in cases of many arguments to fiber...

CVE-2018-12248

An issue was discovered in mruby 1.4.1. There is a heap-based buffer over-read associated with OPENTER because mrbgems/mruby-fiber/src/fiber.c does not extend the stack in cases of many arguments to fiber...

CVE-2018-12248

An issue was discovered in mruby 1.4.1. There is a heap-based buffer over-read associated with OPENTER because mrbgems/mruby-fiber/src/fiber.c does not extend the stack in cases of many arguments to fiber...

Heap overflow

An issue was discovered in mruby 1.4.1. There is a heap-based buffer over-read associated with OPENTER because mrbgems/mruby-fiber/src/fiber.c does not extend the stack in cases of many arguments to fiber...

CVE-2018-12248

An issue was discovered in mruby 1.4.1. There is a heap-based buffer over-read associated with OPENTER because mrbgems/mruby-fiber/src/fiber.c does not extend the stack in cases of many arguments to fiber...

CVE-2018-12248

The CVE-2018-12248 entry concerns mruby 1.4.1, where a heap-based buffer over-read occurs in the OP_ENTER path when fiber is invoked with many arguments. The underlying cause is that mrbgems/mruby-fiber/src/fiber.c does not extend the stack sufficiently for large argument lists. Affects mruby 1.4...

Heap buffer overflow in OP_ENTER

An issue was discovered in mruby 1.4.1. There is a heap-based buffer over-read associated with OPENTER because a heap-based mrbgems/mruby-fiber/src/fiber.c does not extend the stack in cases of many arguments to fiber...