CVE-2024-40930: 
Linux Kernel vulnerability analysis and mitigation

CVE-2024-40930 affects the Linux kernel's wifi subsystem, specifically in the cfg80211 component's HE (High Efficiency) operation element parsing functionality. The vulnerability was discovered and disclosed on July 12, 2024, and involves insufficient validation of the HE operation element length before parsing (NVD).

The vulnerability exists in the Linux kernel's wireless networking stack, specifically in the net/wireless/scan.c file. The issue stems from inadequate validation of the HE operation element length before parsing it. The fix involves adding additional length validation by checking if the datalen is greater than or equal to the ieee80211_he_oper_size of the element (Kernel Commit).

While specific impact details are not explicitly stated in the available sources, the vulnerability affects the wireless networking functionality in the Linux kernel, particularly systems using the cfg80211 subsystem for WiFi operations.

The vulnerability has been patched in various Linux kernel versions. Ubuntu has released fixes in version 6.8.0-44.44 for Ubuntu 24.04 LTS (noble) and corresponding versions for other supported platforms (Ubuntu Security). The fix has been backported to multiple kernel versions and is available through standard system updates.