#VU106843 Integer overflow in Linux kernel - CVE-2025-21964

Vulnerability identifier: #VU106843

Vulnerability risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2025-21964

CWE-ID: CWE-190

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 execute arbitrary code.

The vulnerability exists due to integer overflow within the smb3_fs_context_parse_param() function in fs/smb/client/fs_context.c. A local user can execute arbitrary code.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 6.1 - 6.1.131

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External links
https://git.kernel.org/stable/c/0252c33cc943e9e48ddfafaa6b1eb72adb68a099
https://git.kernel.org/stable/c/5f500874ab9b3cc8c169c2ab49f00b838520b9c5
https://git.kernel.org/stable/c/7489161b1852390b4413d57f2457cd40b34da6cc
https://git.kernel.org/stable/c/833f2903eb8b70faca7967319e580e9ce69729fc
https://git.kernel.org/stable/c/dd190168e60ac15408f074a1fe0ce36aff34027b
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.132

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Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?