CVE-2025-39888

In the Linux kernel, the following vulnerability has been resolved: fuse: Block access to folio overlimit syz reported a slab-out-of-bounds Write in fuse_dev_do_write. When the number of bytes to be retrieved is truncated to the upper limit by fc->max_pages and there is an offset, the oob is triggered. Add a loop termination condition to prevent overruns.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/623719227b114d73a2cee45f1b343ced63ce09ec	Patch
https://git.kernel.org/stable/c/9d81ba6d49a7457784f0b6a71046818b86ec7e44	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::::::

History

19 Oct 2026, 21:10

Type	Values Removed	Values Added
Summary		(es) En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta: fuse: Bloquear el acceso a folio sobre el límite syz informó una escritura fuera de límites de slab en fuse_dev_do_write. Cuando el número de bytes a recuperar se trunca al límite superior por fc->max_pages y hay un desplazamiento, el oob se activa. Añadir una condición de terminación de bucle para prevenir desbordamientos.

Information

Published : 2025-09-23 06:15

Updated : 2026-10-19 21:10

NVD link : CVE-2025-39888

Mitre link : CVE-2025-39888

CVE.ORG link : CVE-2025-39888

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-787

Out-of-bounds Write

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