#VU106811 Improper error handling in Linux kernel - CVE-2025-21899

Vulnerability identifier: #VU106811

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-2025-21899

CWE-ID: CWE-388

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 error handling within the event_hist_trigger_parse() function in kernel/trace/trace_events_hist.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, 6.13.2, 6.13.3, 6.13.4, 6.13.5

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External links
https://git.kernel.org/stable/c/435d2964af815aae456db554c62963b4515f19d0
https://git.kernel.org/stable/c/43b254d46c740bf9dbe65709afa021dd726dfa99
https://git.kernel.org/stable/c/5ae1b18f05ee2b849dc03b6c15d7da0c1c6efa77
https://git.kernel.org/stable/c/6f86bdeab633a56d5c6dccf1a2c5989b6a5e323e
https://git.kernel.org/stable/c/f1ae50cfb818ce1ac7a674406dfadb7653e2552d
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.13.6

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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.