#VU103582 Out-of-bounds read in Linux kernel - CVE-2025-21680

Vulnerability identifier: #VU103582

Vulnerability risk: Low

CVSSv4.0: 1.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:U/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2025-21680

CWE-ID: CWE-125

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 an out-of-bounds read error within the get_imix_entries() function in net/core/pktgen.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/1a9b65c672ca9dc4ba52ca2fd54329db9580ce29
https://git.kernel.org/stable/c/3450092cc2d1c311c5ea92a2486daa2a33520ea5
https://git.kernel.org/stable/c/76201b5979768500bca362871db66d77cb4c225e
https://git.kernel.org/stable/c/7cde21f52042aa2e29a654458166b873d2ae66b3
https://git.kernel.org/stable/c/e5d24a7074dcd0c7e76b7e7e4efbbe7418d62486

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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.