Advisory Published
Updated

CVE-2024-57875: block: RCU protect disk->conv_zones_bitmap

First published: Sat Jan 11 2025(Updated: )

In the Linux kernel, the following vulnerability has been resolved: block: RCU protect disk->conv_zones_bitmap Ensure that a disk revalidation changing the conventional zones bitmap of a disk does not cause invalid memory references when using the disk_zone_is_conv() helper by RCU protecting the disk->conv_zones_bitmap pointer. disk_zone_is_conv() is modified to operate under the RCU read lock and the function disk_set_conv_zones_bitmap() is added to update a disk conv_zones_bitmap pointer using rcu_replace_pointer() with the disk zone_wplugs_lock spinlock held. disk_free_zone_resources() is modified to call disk_update_zone_resources() with a NULL bitmap pointer to free the disk conv_zones_bitmap. disk_set_conv_zones_bitmap() is also used in disk_update_zone_resources() to set the new (revalidated) bitmap and free the old one.

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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Frequently Asked Questions

  • What is the severity of CVE-2024-57875?

    CVE-2024-57875 has been classified as a moderate vulnerability in the Linux kernel.

  • How do I fix CVE-2024-57875?

    To fix CVE-2024-57875, you should update your Linux kernel to the latest patched version provided by your distribution.

  • What are the potential impacts of CVE-2024-57875?

    The potential impact of CVE-2024-57875 includes invalid memory references that may affect the stability of the system.

  • Which versions of the Linux kernel are affected by CVE-2024-57875?

    CVE-2024-57875 affects specific versions of the Linux kernel that handle disk zone bitmap management.

  • Is there a workaround for CVE-2024-57875?

    Currently, there are no known workarounds for CVE-2024-57875 other than upgrading to a secure version of the kernel.

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