CVE-2024-26693: wifi: iwlwifi: mvm: fix a crash when we run out of stations
In the Linux kernel, the following vulnerability has been resolved:
wifi: iwlwifi: mvm: fix a crash when we run out of stations
A DoS tool that injects loads of authentication frames made our AP crash. The iwlmvmisdup() function couldn't find the per-queue dupdata which was not allocated.
The root cause for that is that we ran out of stations in the firmware and we didn't really add the station to the firmware, yet we didn't return an error to mac80211. Mac80211 was thinking that we have the station and because of that, stainfo::uploaded was set to 1. This allowed ieee80211findstabyifaddr() to return a valid station object, but that ieee80211sta didn't have any iwlmvmsta object initialized and that caused the crash mentioned earlier when we got Rx on that station.
Other sources
In the Linux kernel, the following vulnerability has been resolved:
wifi: iwlwifi: mvm: fix a crash when we run out of stations
The Linux kernel CVE team has assigned CVE-2024-26693 to this issue.
Upstream advisory: https://lore.kernel.org/linux-cve-announce/2024040337-CVE-2024-26693-9c3b@gregkh/T
— Red Hat
Affected Software
Remediation
Event History
Frequently Asked Questions
What is the severity of CVE-2024-26693?
CVE-2024-26693 has a severity rating that indicates a potential denial-of-service risk affecting the Linux kernel's wifi component.
How do I fix CVE-2024-26693?
To mitigate CVE-2024-26693, update to the appropriate kernel versions such as 6.6.18, 6.7.6, 6.8, or the specified Debian versions.
What systems are affected by CVE-2024-26693?
CVE-2024-26693 affects Linux kernel versions up to 6.6.18 and includes specific fixes in Debian kernel versions.
What is the nature of the vulnerability in CVE-2024-26693?
CVE-2024-26693 is a denial-of-service vulnerability caused by a crash in the iwlwifi driver when overwhelmed by authentication frames.
When was CVE-2024-26693 resolved?
CVE-2024-26693 was resolved in the Linux kernel with specific updates made available for the affected versions.