CVE-2024-53055: wifi: iwlwifi: mvm: fix 6 GHz scan construction
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.
Other sources
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— Launchpad
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
debian/linuxto a version that resolves this vulnerability.Fixed in 5.10.223-1Fixed in 5.10.234-1Fixed in 6.1.129-1Fixed in 6.1.135-1Fixed in 6.12.25-1Fixed in 6.12.27-1 - Upgrade
Upgrade
debian/linux-6.1to a version that resolves this vulnerability.Fixed in 6.1.129-1~deb11u1 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 5.15.173.1-1 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.6.64.2-1
Event History
Frequently Asked Questions
What is the severity of CVE-2024-53055?
CVE-2024-53055 has been classified as a medium severity vulnerability in the Linux kernel.
How do I fix CVE-2024-53055?
To resolve CVE-2024-53055, it is recommended to update your Linux kernel to a version that includes the patch for this vulnerability.
What versions of the Linux kernel are affected by CVE-2024-53055?
CVE-2024-53055 affects multiple versions of the Linux kernel ranging from 5.11 up to 6.12-rc5.
What types of issues can CVE-2024-53055 cause?
CVE-2024-53055 can lead to eternal looping in the 6 GHz scan construction process if numerous colocated APs are present.
Is CVE-2024-53055 a network-related vulnerability?
Yes, CVE-2024-53055 is related to the WiFi scanning capabilities of the Linux kernel.