CVE-2024-53055 Information

Description

In the Linux kernel the following vulnerability has been resolved:

wifi: iwlwifi: mvm: fix 6 GHz scan construction

If more than 255 colocated APs exist for the set of all APs found during 2.4/5 GHz scanning then the 6 GHz scan construction will loop forever since the loop variable has type u8 which can never reach the number found when that’s bigger than 255 and is stored in a u32 variable. Also move it into the loops to have a smaller scope.

Using a u32 there is fine we limit the number of APs in the scan list and each has a limit on the number of RNR entries due to the frame size. With a limit of 1000 scan results a frame size upper bound of 4096 (really it’s more like ~2300) and a TBTT entry size of at least 11 we get an upper bound for the number of ~372k well in the bounds of a u32.

Reference

https://git.kernel.org/stable/c/2ac15e5a8f42fed5d90ed9e1197600913678c50f https://git.kernel.org/stable/c/cde8a7eb5c6762264ff0f4433358e0a0d250c875 https://git.kernel.org/stable/c/fc621e7a043de346c33bd7ae7e2e0c651d6152ef https://git.kernel.org/stable/c/2ccd5badadab2d586e91546bf5af3deda07fef1f https://git.kernel.org/stable/c/7245012f0f496162dd95d888ed2ceb5a35170f1a