CVE-2022-24958 in Linux
Summary
by MITRE • 02/11/2022
drivers/usb/gadget/legacy/inode.c in the Linux kernel through 5.16.8 mishandles dev->buf release.
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Analysis
by VulDB Data Team • 05/18/2025
The vulnerability identified as CVE-2022-24958 resides within the Linux kernel's USB gadget subsystem, specifically in the file drivers/usb/gadget/legacy/inode.c. This issue represents a critical memory management flaw that affects kernel versions up to 5.16.8, potentially allowing for arbitrary code execution or system instability when handling USB device operations. The vulnerability stems from improper handling of device buffer releases within the legacy USB gadget interface implementation, creating a potential pathway for malicious actors to exploit kernel memory corruption.
The technical flaw manifests when the kernel's USB gadget driver fails to properly manage memory buffers associated with device operations. During the release process of device buffers, the code does not adequately validate or handle the cleanup of allocated memory regions, leading to potential use-after-free conditions or memory corruption scenarios. This improper buffer management occurs within the legacy USB gadget framework that supports older USB device emulation capabilities, making it particularly concerning given the widespread use of USB interfaces in computing environments. The vulnerability can be triggered when USB gadget operations attempt to release device buffers, particularly in scenarios involving device enumeration or data transfer operations.
The operational impact of this vulnerability extends beyond simple memory corruption, potentially enabling attackers to execute arbitrary code with kernel privileges or cause system crashes and denial of service conditions. An attacker who can influence USB gadget operations or device interactions could exploit this flaw to escalate privileges, bypass security controls, or disrupt system operations. The vulnerability affects systems running Linux kernel versions 5.16.8 and earlier, encompassing a significant portion of enterprise and embedded systems that rely on USB gadget functionality for device emulation, networking, or peripheral communication. This includes servers, embedded devices, and IoT systems that utilize USB gadget drivers for various operational functions.
Mitigation strategies for CVE-2022-24958 focus primarily on kernel updates and system hardening measures. Organizations should prioritize upgrading to Linux kernel versions 5.16.9 or later where this vulnerability has been addressed through proper buffer management implementation. System administrators should also consider disabling unnecessary USB gadget functionality and implementing strict access controls for USB device operations. The vulnerability aligns with CWE-415 which addresses double free errors and CWE-416 which covers use after free conditions, both of which are fundamental memory safety issues that can lead to privilege escalation. From an attack framework perspective, this vulnerability could be leveraged through techniques described in ATT&CK tactic TA0004 (Privilege Escalation) and TA0005 (Defense Evasion), particularly through kernel-level exploitation methods that target memory corruption vulnerabilities. Additionally, implementing kernel memory protection features such as KASLR, SMEP, and SMAP can provide additional defense in depth against potential exploitation attempts.