# Ubuntu releases kernel security updates for 14.04 LTS addressing Bluetooth and filesystem flaws

> **Key takeaway:** Ubuntu has issued critical kernel updates for the legacy 14.04 LTS release to patch a Bluetooth use-after-free vulnerability and filesystem infrastructure issues.

**Published:** 2026-11-03T11:03:23+00:00 
**Source:** Ubuntu Security & Release Notices 
**Category:** distro-news 
**Canonical URL:** https://fosswire.org/news/ubuntu-releases-kernel-security-updates-for-1404-lts-address.html 

## Summary
Canonical has published security notice USN-8968-1, providing critical patches for the Linux kernel on Ubuntu 14.04 LTS (Trusty Tahr). The update addresses multiple vulnerabilities that could allow local attackers to compromise system integrity or cause service disruptions.

Specifically, the update targets a use-after-free vulnerability in the Bluetooth subsystem and flaws within the file systems infrastructure. Because these updates involve an unavoidable ABI change, users with third-party kernel modules will need to recompile them to maintain system stability.

## Vulnerability details and deployment requirements
- **Bluetooth Subsystem:** Addresses CVE-2021-3640, a use-after-free vulnerability that allows a local attacker to trigger a denial of service via a system crash or potentially execute arbitrary code.
- **File Systems Infrastructure:** Patches CVE-2022-49058 to resolve security issues within the kernel's filesystem management components.
- **Kernel Versioning:** Updates the 3.13.0-219-generic image to version 3.13.0-219.270; note that these fixes are primarily available via Ubuntu Pro Legacy Support for this specific release.
- **ABI Compatibility:** The update introduces an ABI change, necessitating the recompilation and reinstallation of any non-standard or third-party kernel modules.

## Why it matters
This update is critical for users maintaining legacy 14.04 LTS systems, particularly those relying on Ubuntu Pro for extended security coverage. System administrators must be aware of the ABI change, as failing to recompile third-party modules after the update could lead to driver failures or system instability.