CVE-2021-46924

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    CVE-2021-46924

    Published: 27 Feb 2024Last Modified: 15 Mar 2026

    Summary:

    Details: In the Linux kernel, the following vulnerability has been resolved: NFC: st21nfca: Fix memory leak in device probe and remove 'phy->pending_skb' is alloced when device probe, but forgot to free in the error handling path and remove path, this cause memory leak as follows: unreferenced object 0xffff88800bc06800 (size 512): comm "8", pid 11775, jiffies 4295159829 (age 9.032s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<00000000d66c09ce>] __kmalloc_node_track_caller+0x1ed/0x450 [<00000000c93382b3>] kmalloc_reserve+0x37/0xd0 [<000000005fea522c>] __alloc_skb+0x124/0x380 [<0000000019f29f9a>] st21nfca_hci_i2c_probe+0x170/0x8f2 Fix it by freeing 'pending_skb' in error and remove.

    References: https://git.kernel.org/stable/c/a1e0080a35a16ce3808f7040fe0c3a8fdb052349, https://git.kernel.org/stable/c/e553265ea56482da5700f56319fda9ff53e7dcb4, https://git.kernel.org/stable/c/1b9dadba502234eea7244879b8d5d126bfaf9f0c, https://git.kernel.org/stable/c/1cd4063dbc91cf7965d73a6a3855e2028cd4613b, https://git.kernel.org/stable/c/238920381b8925d070d32d73cd9ce52ab29896fe, https://git.kernel.org/stable/c/38c3e320e7ff46f2dc67bc5045333e63d9f8918d

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2021-46924 | CVE-DB