A critical security vulnerability has been identified in the Linux kernel’s nftables subsystem, allowing local attackers to escalate privileges through a double-free memory flaw. The issue stems from improper handling during set destruction, enabling arbitrary code execution if exploited.
Affected: Linux kernel, nftables subsystem
Affected: Linux kernel, nftables subsystem
Keypoints
- A severe double-free vulnerability exists in the nftables subsystem of the Linux kernel, affecting its packet filtering capabilities.
- The flaw is located in the nft_set_pipapo_destroy() function, specifically when handling sets marked as “dirty.”
- Attackers can exploit this vulnerability by creating and modifying sets, leading to double-free conditions during destruction.
- This memory corruption can be manipulated to execute arbitrary code and escalate privileges locally.
- The Linux kernel community has issued patches to fix the issue by improving memory management and set destruction procedures.
- Users and administrators are advised to update their systems with the latest kernel versions containing these security fixes.
- This vulnerability underscores the importance of rigorous memory handling in kernel development to prevent exploitation risks.
Read More: https://thecyberexpress.com/cve-2024-26809-nftables-vulnerability/