Memory leak in Linux kernel - CVE-2025-21788

Vulnerability identifier: #VU104941

CSH Severity: Low

CVSS v4: 6.8 [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]

CVE-ID: CVE-2025-21788

CWE-ID: CWE-401

Exploitation vector: Local access

Exploit availability: No public exploit available

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.

Linux kernel
Ubuntu
linux (Ubuntu package)
linux-aws (Ubuntu package)
linux-lowlatency (Ubuntu package)

Install update from vendor's website.

Linux kernel - update to 6.13.4
linux (Ubuntu package) - addressed in versions 6.11.0-26.26, 6.11.0-26.26~24.04.1, 6.11.0-1010.10, 6.11.0-1013.13, 6.11.0-1015.15, 6.11.0-1015.15~24.04.1, 6.11.0-1022.22
linux-aws (Ubuntu package) - update to 6.11.0-1014.15
linux-lowlatency (Ubuntu package) - addressed in versions 6.11.0-1014.15, 6.11.0-1014.15~24.04.1, 6.11.0-1016.17

• 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

• Memory leak in Linux kernel ethernet ti driver
• Ubuntu update for linux
• Ubuntu update for linux-aws
• Ubuntu update for linux-lowlatency