#VU105069 Buffer overflow in Linux kernel - CVE-2025-21738

Vulnerability identifier: #VU105069

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-2025-21738

CWE-ID: CWE-119

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 memory corruption within the ata_pio_sector() function in drivers/ata/libata-sff.c. A local user can perform a denial of service (DoS) attack.

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/0a17a9944b8d89ef03946121241870ac53ddaf45
https://git.kernel.org/stable/c/0dd5aade301a10f4b329fa7454fdcc2518741902
https://git.kernel.org/stable/c/6e74e53b34b6dec5a50e1404e2680852ec6768d2
https://git.kernel.org/stable/c/a8f8cf87059ed1905c2a5c72f8b39a4f57b11b4c
https://git.kernel.org/stable/c/d5e6e3000309359eae2a17117aa6e3c44897bf6c

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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.