Nixpkgs Security Tracker

Permalink CVE-2026-1979

updated 2 weeks ago by @LeSuisse Activity log

Created automatic suggestion 2 weeks, 1 day ago
@LeSuisse accepted 2 weeks ago
@LeSuisse published on GitHub 2 weeks ago

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 mrb_vm_exec 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 patch is called e50f15c1c6e131fa7934355eb02b8173b13df415. It is advisable to implement a patch to correct this issue.

Affected products

mruby

==3.4.0
==3.0
==3.1
==3.3
==3.2

Matching in nixpkgs

pkgs.mruby

Embeddable implementation of the Ruby language

nixos-unstable 3.3.0
- nixpkgs-unstable 3.3.0
- nixos-unstable-small 3.3.0
nixos-25.11 3.3.0
- nixos-25.11-small 3.3.0
- nixpkgs-25.11-darwin 3.3.0

Package maintainers

@nicknovitski Nick Novitski <nixpkgs@nicknovitski.com>

Upstream issue: https://github.com/mruby/mruby/issues/6701
Upstream fix: https://github.com/mruby/mruby/commit/e50f15c1c6e131fa7934355eb02b8173b13df415

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Affected products

Matching in nixpkgs

pkgs.mruby

Package maintainers