#VU105049 Integer overflow in Linux kernel - CVE-2025-21736

Vulnerability identifier: #VU105049

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-2025-21736

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 nilfs_fiemap() function in fs/nilfs2/inode.c. A local user can execute arbitrary code.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

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External links
https://git.kernel.org/stable/c/250423300b4b0335918be187ef3cade248c06e6a
https://git.kernel.org/stable/c/6438ef381c183444f7f9d1de18f22661cba1e946
https://git.kernel.org/stable/c/b9495a9109abc31d3170f7aad7d48aa64610a1a2
https://git.kernel.org/stable/c/f2bd0f1ab47822fe5bd699c8458b896c4b2edea1
https://git.kernel.org/stable/c/f3d80f34f58445355fa27b9579a449fb186aa64e

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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.