#VU106601 Use-after-free in Linux kernel - CVE-2025-21929

Vulnerability identifier: #VU106601

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-2025-21929

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 hid_ishtp_cl_remove() function in drivers/hid/intel-ish-hid/ishtp-hid-client.c. A local user can escalate privileges on the system.

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, 6.13.6

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External links
https://git.kernel.org/stable/c/823987841424289339fdb4ba90e6d2c3792836db
https://git.kernel.org/stable/c/9c677fe859a73f5dd3dd84c27f99e10d28047c73
https://git.kernel.org/stable/c/e040f11fbca868c6d151e9f2c5730c476abfcf17
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.13.7

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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.