CVE-2026-13573 MEDIUM

CVE-2026-13573: llvm llvm-project ValueSymbolTable ValueSymbolTable.cpp insert stack-based overflow

Vendor Llvm
Product llvm-project
Weakness CWE-121
Published June 29, 2026
Last update June 29, 2026

CVSS base score

4.8/10
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P

What the vulnerability does

01Description

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 project was informed of the problem early through an issue report but has not responded yet.

Key dates

02Disclosure timeline

June 29, 2026 CVE published