CVE-2024-3209
CWE-122Published: April 2, 2024· Updated: Jun 17, 2026
Official Description
A vulnerability was found in UPX up to 4.2.2. It has been rated as critical. This issue affects the function get_ne64 of the file bele.h. The manipulation leads to heap-based buffer overflow. The exploit has been disclosed to the public and may be used. The associated identifier of this vulnerability is VDB-259055. NOTE: The vendor was contacted early about this disclosure but did not respond in any way.
Risk Analysis
UPX contains a heap-based buffer overflow vulnerability in its memory handling functions. This critical flaw could allow remote attackers to compromise the system, as indicated by the maximum CVSS score.
No public exploit is known, and it is not in the CISA KEV. The vulnerability is remotely exploitable with low complexity.
Update the UPX component to the latest version and apply relevant patches for affected Fedora distributions.
Technical Analysis
CVE-2024-3209 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.
The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.
A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.
CVSS v3.1 Vector Breakdown
Affected Vendors & Products
Exploit & PoC Resources
Official Patches & Advisories
All References (14)
Quick Facts
Related CVEs (CWE-122)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2024-3209 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts