CVE-2025-39822

In the Linux kernel, the following vulnerability has been resolved: io_uring/kbuf: fix signedness in this_len calculation When importing and using buffers, buf->len is considered unsigned. However, buf->len is converted to signed int when committing. This can lead to unexpected behavior if the buffer is large enough to be interpreted as a negative value. Make min_t calculation unsigned.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/c64eff368ac676e8540344d27a3de47e0ad90d21	Patch
https://git.kernel.org/stable/c/f4f411c068402c370c4f9a9d4950a97af97bbbb1	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel:6.17:rc1::::::
	cpe:2.3:o:linux:linux_kernel:6.17:rc2::::::
	cpe:2.3:o:linux:linux_kernel:6.17:rc3::::::

History

19 Oct 2026, 21:10

Type	Values Removed	Values Added
Summary		(es) En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta: io_uring/kbuf: corregir el signo en el cálculo de this_len Al importar y usar búferes, buf->len se considera sin signo. Sin embargo, buf->len se convierte a un entero con signo al confirmar. Esto puede llevar a un comportamiento inesperado si el búfer es lo suficientemente grande como para ser interpretado como un valor negativo. Hacer que el cálculo de min_t sea sin signo.

Information

Published : 2025-09-16 13:15

Updated : 2026-10-19 21:10

NVD link : CVE-2025-39822

Mitre link : CVE-2025-39822

CVE.ORG link : CVE-2025-39822

JSON object : View

Products Affected

linux

linux_kernel

CWE

NVD-CWE-noinfo

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