Back Linuxsecurity

Fedora 43: proxychains-ng Denial of Service CVE-2025

Linuxsecurity •LinuxSecurity Advisories • January 6, 2026

ProxyChains NG is based on ProxyChains. ProxyChains NG hooks network-related (TCP only) libc functions in dynamically linked programs via a preloaded DSO (dynamic shared object) and redirects the connections through one or more SOCKS4a/5 or HTTP proxies. Since Proxy Chains NG relies on the dynamic linker, statically linked binaries are not supported. Update Information : Update to master to fix CVE-2025-34451

ProxyChains NG is based on ProxyChains.

ProxyChains NG hooks network-related (TCP only) libc functions in dynamically

linked programs via a preloaded DSO (dynamic shared object) and redirects the

connections through one or more SOCKS4a/5 or HTTP proxies.

Since Proxy Chains NG relies on the dynamic linker, statically linked binaries

Update to master to fix CVE-2025-34451

* Sun Dec 28 2025 Pablo Greco - 4.17-8 - Update to master to fix warning and add * Sat Dec 27 2025 Pablo Greco - 4.17-7 - Update to master to fix CVE-2025-34451

[ 1 ] Bug #2423793 - CVE-2025-34451 proxychains-ng: proxychains-ng: Denial of Service due to stack-based buffer overflow via crafted proxy configuration [epel-10] [ 2 ] Bug #2423794 - CVE-2025-34451 proxychains-ng: proxychains-ng: Denial of Service due to stack-based buffer overflow via crafted proxy configuration [epel-8] [ 3 ] Bug #2423795 - CVE-2025-34451 proxychains-ng: proxychains-ng: Denial of Service due to stack-based buffer overflow via crafted proxy configuration [epel-9] [ 4 ] Bug #2423796 - CVE-2025-34451 proxychains-ng: proxychains-ng: Denial of Service due to stack-based buffer overflow via crafted proxy configuration [fedora-42] [ 5 ] Bug #2423797 - CVE-2025-34451 proxychains-ng: proxychains-ng: Denial of Service d... Read the Full Advisory

This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2025-58fe871812' at the command line. For more information, refer to the dnf documentation available at

The full story

This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

Critical Update for ProxyChains NG Addresses CVE-2025-34451 Vulnerability ProxyChains NG, a tool for redirecting network connections through proxies, has been updated to address a critical vulnerability identified as CVE-2025-34451. This vulnerability affects dynamically linked programs that utilize TCP functions, and users are advised to update to the latest version to mitigate potential denial of service attacks. 2 sources 18

Extracted Entities

Fedora 43: proxychains-ng Denial of Service CVE-2025

The full story

Extracted Entities

Attack Types (1)

Companies (1)

CVEs (1)

Tools (2)