Cloud Vulnerability DB
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Vulnerability DatabaseCVE-2024-43878
CVE-2024-43878:
Linux Kernel vulnerability analysis and mitigation
Overview
CVE-2024-43878 is a vulnerability in the Linux kernel's XFRM subsystem that affects the input error path memory access. The issue was discovered when a misconfiguration of input state slow path triggered a KASAN (Kernel Address Sanitizer) error report (Kernel Git).
Technical details
The vulnerability occurs in the XFRM input processing path when there is a misconfiguration of the input state. The issue specifically manifests in the xfrmircvcb function where improper memory access can lead to a kernel panic. The bug was introduced in commit 304b44f0d5a4 which added dir validation to the "in" data path lookup (Kernel Git).
Impact
When exploited, this vulnerability can cause a kernel panic due to fatal exception in interrupt handling, leading to system instability and potential denial of service. The issue affects various Linux kernel versions and distributions including Red Hat Enterprise Linux and Ubuntu systems (Red Hat Portal).
Mitigation and workarounds
The issue has been fixed in the mainline kernel through a patch that properly resets the security path and handles the error condition in the XFRM input processing. The fix includes adding secpath_reset(skb) and proper cleanup of the XFRM state before dropping the packet (Kernel Git).
Additional resources
Source: This report was generated using AI
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