CVE-2026-0821
Description
A flaw was found in quickjs-ng. A remote attacker can exploit a heap-based buffer overflow vulnerability in the js_typed_array_constructor function of the quickjs.c file by executing a specially crafted manipulation. This vulnerability may lead to information disclosure, denial of service, or potentially arbitrary code execution.
Statement
This vulnerability is rated Important for Red Hat. A heap-based buffer overflow in the js_typed_array_constructor function of quickjs-ng can be exploited by a remote attacker through specially crafted manipulation. This flaw may lead to information disclosure, denial of service, or arbitrary code execution. This affects components such as radare2 in Community Projects (EPEL 8, 9, 10 and Fedora 42, 43).
Mitigation
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.
Understanding the Weakness (CWE)
Integrity
Technical Impact: Modify Memory; Execute Unauthorized Code or Commands
Write operations could cause memory corruption. In some cases, an adversary can modify control data such as return addresses in order to execute unexpected code.
Availability
Technical Impact: DoS: Crash, Exit, or Restart
Attempting to access out-of-range, invalid, or unauthorized memory could cause the product to crash.
Other
Technical Impact: Unexpected State
Subsequent write operations can produce undefined or unexpected results.
Frequently Asked Questions
Not sure what something means? Check out our Security Glossary.
Want to get errata notifications? Sign up here.
