CVE-2025-39888

HIGH

Linux Kernel 6.16-6.16.8 - Out-of-bounds Write in FUSE Device Write Operation

Title source: llm

Description

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.

References (2)

Core 2

Core References

Patch

https://git.kernel.org/stable/c/623719227b114d73a2cee45f1b343ced63ce09ec

Patch

https://git.kernel.org/stable/c/9d81ba6d49a7457784f0b6a71046818b86ec7e44

Scores

CVSS v3 7.8

EPSS 0.0014

EPSS Percentile 3.4%

Attack Vector LOCAL

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact total

Details

CWE

CWE-787

Status published

Products (9)

linux/Kernel 6.16.0 - 6.16.8linux

Linux/Linux < 6.16

Linux/Linux 3568a956932621cafadafc8b75fcf6dc06555105 - 623719227b114d73a2cee45f1b343ced63ce09ec

Linux/Linux 3568a956932621cafadafc8b75fcf6dc06555105 - 9d81ba6d49a7457784f0b6a71046818b86ec7e44

Linux/Linux 6.16

Linux/Linux 6.16.8 - 6.16.*

Linux/Linux 6.17

linux/linux_kernel 6.17 rc1 (5 CPE variants)

linux/linux_kernel 6.16 - 6.16.8

Published Sep 23, 2025

Tracked Since Feb 18, 2026