High [CVE-2026-115889] Bit-packing in Cranelift compiler causes silent overflow and miscompilation
This high-severity Red Hat Linux advisory covers CVE-2026-115889; related products: Red Hat Connectivity Link 1, Red Hat Enterprise Linux 10, Red Hat package: tree-sitter.
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Summary
Bit-packing in Cranelift compiler causes silent overflow and miscompilation. Red Hat rates this important (CVSS 8.8).
Weakness: CWE-190.
Affected products named by the advisory: Red Hat Connectivity Link 1; Red Hat Enterprise Linux 10; Red Hat package: tree-sitter; Red Hat package: virt-firmware-rs.
- < 36.0.19
- < 43.0.0
Official advisory · high-confidence parse· fetched 3 days ago·verify at source
- 36.0.19
- 43.0.0
Official advisory · high-confidence parse· fetched 3 days ago·verify at source
Mitigation checklist
- Restrict execution to trusted WebAssembly modules and avoid processing unvalidated binaries from untrusted sources. If the runtime must process untrusted modules, deploy the hosting application inside an operating system-level sandbox or container (such as Podman or a systemd service unit configured with strict seccomp filtering, unprivileged user namespaces, and read-only filesystem mounts) to contain a potential sandbox breakout. Caveats: Additional host-level sandboxing introduces operational overhead and may restrict legitimate host system interactions or inter-process communication required by the guest application.
Official advisory · high-confidence parse· fetched 3 days ago·verify at source
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