CVE-2025-39962

In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix untrusted unsigned subtract Fix the following Smatch static checker warning: net/rxrpc/rxgk_app.c:65 rxgk_yfs_decode_ticket() warn: untrusted unsigned subtract. 'ticket_len - 10 * 4' by prechecking the length of what we're trying to extract in two places in the token and decoding for a response packet. Also use sizeof() on the struct we're extracting rather specifying the size numerically to be consistent with the other related statements.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/2429a197648178cd4dc930a9d87c13c547460564	Patch
https://git.kernel.org/stable/c/71571e187106631a8127f2dde780f35caa358d33	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::::::
	cpe:2.3:o:linux:linux_kernel:6.17:rc4::::::
	cpe:2.3:o:linux:linux_kernel:6.17:rc5::::::
	cpe:2.3:o:linux:linux_kernel:6.17:rc6::::::

History

19 Oct 2026, 21:10

Type	Values Removed	Values Added
Summary		(es) En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta: rxrpc: Corrección de resta sin signo no confiable Corregir la siguiente advertencia del verificador estático Smatch: net/rxrpc/rxgk_app.c:65 rxgk_yfs_decode_ticket() advertencia: resta sin signo no confiable. 'ticket_len - 10 * 4' mediante la verificación previa de la longitud de lo que estamos intentando extraer en dos lugares en el token y la decodificación para un paquete de respuesta. También usar sizeof() en la estructura que estamos extrayendo en lugar de especificar el tamaño numéricamente para ser consistente con las otras declaraciones relacionadas.

Information

Published : 2025-10-09 13:15

Updated : 2026-10-19 21:10

NVD link : CVE-2025-39962

Mitre link : CVE-2025-39962

CVE.ORG link : CVE-2025-39962

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-787

Out-of-bounds Write

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