medium
5.5
Advisory Published
CVE Published
Updated

CVE-2024-26693: wifi: iwlwifi: mvm: fix a crash when we run out of stations

First published: Wed Apr 03 2024(Updated: )

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 iwl_mvm_is_dup() function couldn't find the per-queue dup_data 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, sta_info::uploaded was set to 1. This allowed ieee80211_find_sta_by_ifaddr() to return a valid station object, but that ieee80211_sta didn't have any iwl_mvm_sta object initialized and that caused the crash mentioned earlier when we got Rx on that station.

Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Affected SoftwareAffected VersionHow to fix
redhat/kernel<6.6.18
6.6.18
redhat/kernel<6.7.6
6.7.6
redhat/kernel<6.8
6.8
Linux Kernel>=6.4<6.6.18
Linux Kernel>=6.7<6.7.6
Linux Kernel=6.8-rc1
Linux Kernel=6.8-rc2
Linux Kernel=6.8-rc3
Linux Kernel=6.8-rc4
IBM Security Verify Governance - Identity Manager<=ISVG 10.0.2
IBM Security Verify Governance, Identity Manager Software Stack<=ISVG 10.0.2
IBM Security Verify Governance, Identity Manager Virtual Appliance<=ISVG 10.0.2
IBM Security Verify Governance Identity Manager Container<=ISVG 10.0.2
debian/linux
5.10.223-1
5.10.234-1
6.1.129-1
6.1.128-1
6.12.21-1
6.12.22-1

Remedy

https://git.kernel.org/stable/c/00f4eb31b8193f6070ce24df636883f9c104ca95

Remedy

https://git.kernel.org/stable/c/b7198383ef2debe748118996f627452281cf27d7

Remedy

https://git.kernel.org/stable/c/c12f0f4d4caf23b1bfdc2602b6b70d56bdcd6aa7

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

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.

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