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CVE-2024-56774 – “Linux Btrfs Null-Pointer Dereference Vulnerability”

The following table lists the changes that have been made to the
CVE-2024-56774 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution
of a vulnerability, and for identifying the most recent changes that may
impact the vulnerability’s severity, exploitability, or other characteristics.

  • New CVE Received
    by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Jan. 08, 2025

    Action Type Old Value New Value
    Added Description In the Linux kernel, the following vulnerability has been resolved:

    btrfs: add a sanity check for btrfs root in btrfs_search_slot()

    Syzbot reports a null-ptr-deref in btrfs_search_slot().

    The reproducer is using rescue=ibadroots, and the extent tree root is
    corrupted thus the extent tree is NULL.

    When scrub tries to search the extent tree to gather the needed extent
    info, btrfs_search_slot() doesn’t check if the target root is NULL or
    not, resulting the null-ptr-deref.

    Add sanity check for btrfs root before using it in btrfs_search_slot().
    Added Reference https://git.kernel.org/stable/c/3ed51857a50f530ac7a1482e069dfbd1298558d4
    Added Reference https://git.kernel.org/stable/c/757171d1369b3b47f36932d40a05a0715496dcab
    Added Reference https://git.kernel.org/stable/c/93992c3d9629b02dccf6849238559d5c24f2dece
    Added Reference https://git.kernel.org/stable/c/c71d114ef68c95da5a82ec85a721ab31f5bd905b
    Added Reference https://git.kernel.org/stable/c/db66fb87c21e8ae724886e6a464dcbac562a64c6
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