Low [CVE-2026-13573] Denial of Service via stack-based buffer overflow in StringMap::insert
This low-severity Red Hat Linux advisory covers CVE-2026-13573 affecting Red Hat Hardened Images, Red Hat AI Inference Server, Red Hat Enterprise Linux 10.
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Summary
A vulnerability was found in llvm llvm-project up to 22.1.6. This affects the function llvm::StringMap::insert in the library /lib/IR/ValueSymbolTable.cpp of the component ValueSymbolTable Module.
The manipulation results in stack-based buffer overflow. Attacking locally is a requirement.
The exploit has been made public and could be used. The presence of this vulnerability remains uncertain at this time.
This manipulation could lead to a denial of service, making the affected system or application unavailable. Successful exploitation could lead to a denial of service, affecting the availability of systems utilizing the vulnerable LLVM component.
The vulnerability is limited to local access, reducing its overall risk in typical Red Hat deployments. 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-120. Affected Red Hat products: Red Hat Hardened Images; Red Hat AI Inference Server; Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux AI (RHEL AI) 3; Red Hat OpenShift AI (RHOAI); Red Hat OpenShift Container Platform 4.
Red Hat fixing advisory: RHSA-2026:24069, RHSA-2026:7634.
Affected products named by the advisory: Red Hat package: llvm; Red Hat package: clang.
- 22.1.6
Official advisory · high-confidence parse· fetched 13 days ago·verify at source
- llvm21-main-21.1.8-6.hum1
- llvm-main-21.1.8-1.1.hum1
- RHSA-2026:24069
- RHSA-2026:7634
Official advisory · high-confidence parse· fetched 13 days ago·verify at source
Mitigation checklist
- Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Official advisory · high-confidence parse· fetched 13 days ago·verify at source
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