#VU110683 Use-after-free in Linux kernel - CVE-2025-38000

Vulnerability identifier: #VU110683

Vulnerability risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2025-38000

CWE-ID: CWE-416

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 escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the hfsc_enqueue() function in net/sched/sch_hfsc.c. A local user can escalate privileges on the system.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Linux kernel: All versions

---

External links
https://git.kernel.org/stable/c/1034e3310752e8675e313f7271b348914008719a
https://git.kernel.org/stable/c/3f3a22eebbc32b4fa8ce9c1d5f9db214b45b9335
https://git.kernel.org/stable/c/3f981138109f63232a5fb7165938d4c945cc1b9d
https://git.kernel.org/stable/c/49b21795b8e5654a7df3d910a12e1060da4c04cf
https://git.kernel.org/stable/c/89c301e929a0db14ebd94b4d97764ce1d6981653
https://git.kernel.org/stable/c/93c276942e75de0e5bc91576300d292e968f5a02
https://git.kernel.org/stable/c/f1dde3eb17dc1b8bd07aed00004b1e05fc87a3d4
https://git.kernel.org/stable/c/f9f593e34d2fb67644372c8f7b033bdc622ad228

---

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?