#VU109503 Use-after-free in Linux kernel - CVE-2025-37914

Vulnerability identifier: #VU109503

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-2025-37914

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 cl_is_active() and ets_qdisc_enqueue() functions in net/sched/sch_ets.c. A local user can escalate privileges on the system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 6.14, 6.14.1, 6.14.2, 6.14.3, 6.14.4, 6.14.5

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External links
https://git.kernel.org/stable/c/1a6d0c00fa07972384b0c308c72db091d49988b6
https://git.kernel.org/stable/c/1f01e9f961605eb397c6ecd1d7b0233dfbf9077c
https://git.kernel.org/stable/c/554acc5a2ea9703e08023eb9a003f9e5a830a502
https://git.kernel.org/stable/c/72c3da7e6ceb74e74ddbb5a305a35c9fdfcac6e3
https://git.kernel.org/stable/c/9efb6a0fa88e0910d079fdfeb4f7ce4d4ac6c990
https://git.kernel.org/stable/c/bc321f714de693aae06e3786f88df2975376d996
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.14.6

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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.