#VU94283 Improper locking in Linux kernel - CVE-2024-40904

Vulnerability identifier: #VU94283

Vulnerability risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2024-40904

CWE-ID: CWE-667

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to improper locking within the wdm_int_callback() function in drivers/usb/class/cdc-wdm.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

---

External links
https://git.kernel.org/stable/c/217d1f44fff560b3995a685a60aa66e55a7f0f56
https://git.kernel.org/stable/c/05b2cd6d33f700597e6f081b53c668a226a96d28
https://git.kernel.org/stable/c/c0747d76eb05542b5d49f67069b64ef5ff732c6c
https://git.kernel.org/stable/c/53250b54c92fe087fd4b0c48f85529efe1ebd879
https://git.kernel.org/stable/c/02a4c0499fc3a02e992b4c69a9809912af372d94
https://git.kernel.org/stable/c/72a3fe36cf9f0d030865e571f45a40f9c1e07e8a
https://git.kernel.org/stable/c/82075aff7ffccb1e72b0ac8aa349e473624d857c
https://git.kernel.org/stable/c/22f00812862564b314784167a89f27b444f82a46

---

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.