#VU103744 NULL pointer dereference in Linux kernel - CVE-2025-21688

Vulnerability identifier: #VU103744

Vulnerability risk: Low

CVSSv4.0: 1.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:U/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2025-21688

CWE-ID: CWE-476

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 NULL pointer dereference within the v3d_irq() and v3d_hub_irq() functions in drivers/gpu/drm/v3d/v3d_irq.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/01a7e3a43ee2e6607169a75889412344c10b37fd
https://git.kernel.org/stable/c/1f66a3a1a516e4d545906916b3f3c8d1c5e909e6
https://git.kernel.org/stable/c/3059e7aaa280daea57bb069fbc65225e1bb95014
https://git.kernel.org/stable/c/431fb709db434565b5e7cee82a11bd681a794fd3
https://git.kernel.org/stable/c/6cfafcad46e95351c477da0ae7e3acb8f7550ada
https://git.kernel.org/stable/c/6e64d6b3a3c39655de56682ec83e894978d23412
https://git.kernel.org/stable/c/9793206fbf5293534c3a79d78f196e2cbb48c22d
https://git.kernel.org/stable/c/a9401cd5d1bb5a0b8d2bef09623ca43551cd6e8a

---

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.