Advisory Published
Updated

CVE-2024-57898: wifi: cfg80211: clear link ID from bitmap during link delete after clean up

First published: Wed Jan 15 2025(Updated: )

In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: clear link ID from bitmap during link delete after clean up Currently, during link deletion, the link ID is first removed from the valid_links bitmap before performing any clean-up operations. However, some functions require the link ID to remain in the valid_links bitmap. One such example is cfg80211_cac_event(). The flow is - nl80211_remove_link() cfg80211_remove_link() ieee80211_del_intf_link() ieee80211_vif_set_links() ieee80211_vif_update_links() ieee80211_link_stop() cfg80211_cac_event() cfg80211_cac_event() requires link ID to be present but it is cleared already in cfg80211_remove_link(). Ultimately, WARN_ON() is hit. Therefore, clear the link ID from the bitmap only after completing the link clean-up.

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

Affected SoftwareAffected VersionHow to fix
Linux Kernel
debian/linux<=5.10.223-1<=5.10.234-1<=6.1.129-1<=6.1.128-1
6.12.20-1
6.12.21-1

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2024-57898?

    CVE-2024-57898 has been classified with a severity rating that indicates a medium risk for potential exploitation in the Linux kernel.

  • How do I fix CVE-2024-57898?

    To mitigate CVE-2024-57898, update your Linux kernel to the latest version where this vulnerability has been patched.

  • What versions of the Linux kernel are affected by CVE-2024-57898?

    CVE-2024-57898 impacts specific versions of the Linux kernel prior to the release containing the fix.

  • What is the nature of the vulnerability in CVE-2024-57898?

    CVE-2024-57898 involves an issue with the cfg80211 component of the Linux kernel that mishandles link ID during link deletion.

  • Has CVE-2024-57898 been exploited in the wild?

    As of now, there have been no reported instances of CVE-2024-57898 being actively exploited in the wild.

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