Denial of service via heap-based buffer overflow in Bitcode File Handler

Summary

A vulnerability was determined in llvm llvm-project up to 22.1.6. This impacts the function GCRelocateInst::getBasePtr in the library llvm/lib/IR/IntrinsicInst.cpp of the component Bitcode File Handler. This manipulation causes heap-based buffer overflow. It is possible to launch the attack on the local host. The exploit has been publicly disclosed and may be utilized. The project was informed of the problem early through an issue report but has not responded yet. A flaw was found in llvm. A local attacker could exploit a heap-based buffer overflow vulnerability in the GCRelocateInst::getBasePtr function within the Bitcode File Handler component. This flaw could lead to a denial of service, making the affected system unavailable. This vulnerability has a Low impact, as it requires a local attacker to exploit a heap-based buffer overflow in the LLVM Bitcode File Handler. Successful exploitation could lead to a denial of service by making the affected system unavailable. Red Hat severity: Low — CVSS 3.3 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L). Weakness: CWE-805. Fixed by RHSA-2026:24069, RHSA-2026:7634 — update the affected packages (`sudo dnf update`). Affected Red Hat products: Red Hat Hardened Images.