#VU105429 Incorrect calculation in Linux kernel - CVE-2025-21832

Vulnerability identifier: #VU105429

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-2025-21832

CWE-ID: CWE-682

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 incorrect calculation within the blkdev_read_iter() function in block/fops.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 6.1 - 6.1.128, 6.6 - 6.6.77, 6.12 - 6.12.13, 6.13 - 6.13.2

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External links
https://git.kernel.org/stable/c/68f16d3034a06661245ecd22f0d586a8b4e7c473
https://git.kernel.org/stable/c/6c26619effb1b4cb7d20b4e666ab8f71f6a53ccb
https://git.kernel.org/stable/c/84671b0630ccb46ae9f1f99a45c7d63ffcd6a474
https://git.kernel.org/stable/c/a58f136bad29f9ae721a29d98c042fddbee22f77
https://git.kernel.org/stable/c/b13ee668e8280ca5b07f8ce2846b9957a8a10853
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.129
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12.14
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.13.3
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.14
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.78

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Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?