CVE-2026-1979 mruby JMPNOT-to-JMPIF Optimization vm.c mrb_vm_exec use after free

A flaw has been found in mruby up to 3.4.0. This affects the function mrbvmexec of the file src/vm.c of the component JMPNOT-to-JMPIF Optimization. Executing a manipulation can lead to use after free. The attack needs to be launched locally. The exploit has been published and may be used. This...

DEBIAN-CVE-2022-1201

NULL Pointer Dereference in mrbvmexec with super in GitHub repository mruby/mruby prior to 3.2. This vulnerability is capable of making the mruby interpreter crash, thus affecting the availability of the system...

use after free in mrb_vm_exec

While fuzzing mruby I found a use after free in mruby compiled with ASAn. Proof of Concept uaf5.rb rb...

shopify-scripts: SIGSEGV - mrb_vm_exec - line:1681

PoC: ------------------- The following code triggers the bug attached as testmrbvmexec1681.rb: def try yield ensure yield end a=lambda do a.try do return end end.call Mirb - Debug: ------------------- gdb r testmrbvmexec1678.rb The program being debugged has been started already. Start it from th...