GHSA-42q4-rvcw-q7wcMediumCVSS 6.2
mrubyc through 4.0.0 contains a null pointer dereference vulnerability in the op_enter() handler...
🔗 CVE IDs covered (1)
📋 Description
mrubyc through 4.0.0 contains a null pointer dereference vulnerability in the op_enter() handler in src/vm.c when processing untrusted bytecode. Attackers can craft malicious .mrb bytecode files with OP_ENTER instructions at the top level to crash the embedding application and cause denial of service.
🔗 References (5)
- https://nvd.nist.gov/vuln/detail/CVE-2026-86547
- https://github.com/mrubyc/mrubyc/blob/4261cf5e5ae5579e3110dab98a04b91c7d919429/src/vm.c#L1534
- https://github.com/mrubyc/mrubyc/blob/release4.0.0/src/vm.c#L1537
- https://www.vulncheck.com/advisories/mrubyc-through-4.0.0-null-pointer-dereference-via-op-enter
- https://github.com/advisories/GHSA-42q4-rvcw-q7wc