Use of uninitialized resource in Linux kernel events

1) Use of uninitialized resource

EUVDB-ID: #VU105043

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-2025-21709

CWE-ID: CWE-908 - Use of Uninitialized Resource

Exploit availability: No

Description

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

The vulnerability exists due to use of uninitialized resource within the mt_set_in_rcu() function in kernel/fork.c, within the register_for_each_vma() function in kernel/events/uprobes.c. A local user can perform a denial of service (DoS) attack.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Linux kernel: 6.13 - 6.13.1

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:6.13:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:6.13.1:*:*:*:*:*:*:*

External links

https://git.kernel.org/stable/c/64c37e134b120fb462fb4a80694bfb8e7be77b14
https://git.kernel.org/stable/c/da139948aeda677ac09cc0e7d837f8a314de7d55
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.13.2

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.