#VU112172 Memory leak in Linux kernel - CVE-2025-38100

Vulnerability identifier: #VU112172

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-2025-38100

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 copy_thread() and native_tss_update_io_bitmap() functions in arch/x86/kernel/process.c, within the io_bitmap_share(), io_bitmap_exit() and SYSCALL_DEFINE1() functions in arch/x86/kernel/ioport.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's repository.

Vulnerable software versions

Linux kernel: All versions

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External links
https://git.kernel.org/stable/c/2cfcbe1554c119402e7382de974c26b0549899fe
https://git.kernel.org/stable/c/2dace5e016c991424a3dc6e83b1ae5dca8992d08
https://git.kernel.org/stable/c/73cfcc8445585b8af7e18be3c9246b851fdf336c
https://git.kernel.org/stable/c/8b68e978718f14fdcb080c2a7791c52a0d09bc6d
https://git.kernel.org/stable/c/aa5ce1485562f20235b4c759eee5ab0c41d2c220
https://git.kernel.org/stable/c/b3b3b6366dc8eb5b22edba9adc4bff3cdacfd64c
https://git.kernel.org/stable/c/d64b7b05a827f98d068f412969eef65489b0cf03

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Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?