# IPFire 2.29 Core Update 205 patches Linux kernel TCP use-after-free vulnerability

> **Key takeaway:** IPFire has released a critical update to address CVE-2026-98432, a serious use-after-free flaw within the Linux kernel's TCP stack.

**Published:** 2026-11-13T11:50:44+00:00 
**Source:** Linux Today 
**Category:** distro-news 
**Canonical URL:** https://fosswire.org/news/ipfire-229-core-update-205-patches-linux-kernel-tcp-use-afte.html 

## Summary
The IPFire project has issued Core Update 205 for its 2.29 release to mitigate a significant security risk. This update specifically targets a vulnerability found in the underlying Linux kernel's networking subsystem.

The patch addresses CVE-2026-98432, which is identified as a serious use-after-free flaw. Because IPFire is a specialized Linux-based firewall distribution, this kernel-level vulnerability directly impacts the integrity of network traffic processing and system stability for all deployed instances.

## Security details of CVE-2026-98432
- **Vulnerability Type:** The flaw is classified as a use-after-free error, which occurs when a program continues to use a pointer after the memory it points to has been freed.
- **Affected Subsystem:** The defect is located within the Linux kernel's TCP stack, affecting how the operating system handles Transmission Control Protocol connections.
- **Impacted Software:** The vulnerability is addressed in IPFire 2.29 via the Core Update 205 release.

## Why it matters
As a security-focused firewall distribution, IPFire users must apply this update to prevent potential exploitation of the kernel's networking layer. This highlights the critical importance of rapid kernel patching for specialized Linux distributions that serve as primary network gateways.