CVE-2024-26748

    Dashboard / Vulnerabilities / CVE-2024-26748

    CVE-2024-26748

    Published: 3 Apr 2024Last Modified: 12 Aug 2026

    Summary: usb: cdns3: fix memory double free when handle zero packet

    Details: In the Linux kernel, the following vulnerability has been resolved: usb: cdns3: fix memory double free when handle zero packet 829 if (request->complete) { 830 spin_unlock(&priv_dev->lock); 831 usb_gadget_giveback_request(&priv_ep->endpoint, 832 request); 833 spin_lock(&priv_dev->lock); 834 } 835 836 if (request->buf == priv_dev->zlp_buf) 837 cdns3_gadget_ep_free_request(&priv_ep->endpoint, request); Driver append an additional zero packet request when queue a packet, which length mod max packet size is 0. When transfer complete, run to line 831, usb_gadget_giveback_request() will free this requestion. 836 condition is true, so cdns3_gadget_ep_free_request() free this request again. Log: [ 1920.140696][ T150] BUG: KFENCE: use-after-free read in cdns3_gadget_giveback+0x134/0x2c0 [cdns3] [ 1920.140696][ T150] [ 1920.151837][ T150] Use-after-free read at 0x000000003d1cd10b (in kfence-#36): [ 1920.159082][ T150] cdns3_gadget_giveback+0x134/0x2c0 [cdns3] [ 1920.164988][ T150] cdns3_transfer_completed+0x438/0x5f8 [cdns3] Add check at line 829, skip call usb_gadget_giveback_request() if it is additional zero length packet request. Needn't call usb_gadget_giveback_request() because it is allocated in this driver.

    References: https://git.kernel.org/stable/c/1e204a8e9eb514e22a6567fb340ebb47df3f3a48, https://git.kernel.org/stable/c/3a2a909942b5335b7ea66366d84261b3ed5f89c8, https://git.kernel.org/stable/c/5fd9e45f1ebcd57181358af28506e8a661a260b3, https://git.kernel.org/stable/c/70e8038813f9d3e72df966748ebbc40efe466019, https://git.kernel.org/stable/c/92d20406a3d4ff3e8be667c79209dc9ed31df5b3, https://git.kernel.org/stable/c/9a52b694b066f299d8b9800854a8503457a8b64c, https://git.kernel.org/stable/c/aad6132ae6e4809e375431f8defd1521985e44e7, https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html, https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26748.json, https://nvd.nist.gov/vuln/detail/CVE-2024-26748, https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 7733f6c32e36ff9d7adadf40001039bf219b1cbe
    Fixed -aad6132ae6e4809e375431f8defd1521985e44e7

    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-2024-26748 | CVE-DB