#VU104941 Memory leak in Linux kernel - CVE-2025-21788

Vulnerability identifier: #VU104941

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-2025-21788

CWE-ID: CWE-401

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 leak within the am65_cpsw_nuss_tx_cleanup(), am65_cpsw_build_skb() and am65_cpsw_nuss_rx_packets() functions in drivers/net/ethernet/ti/am65-cpsw-nuss.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 6.13, 6.13.1, 6.13.2, 6.13.3

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External links
https://git.kernel.org/stable/c/1bba1d042107167164a0ae3a843fdf650ab005d7
https://git.kernel.org/stable/c/5db843258de1e4e6b1ef1cbd1797923c9e3de548
https://git.kernel.org/stable/c/dc11f049612b9d926aca2e55f8dc9d82850d0da3
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.13.4

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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.