CVE-2025-21659

MEDIUM

Linux Kernel 6.8-6.12.10 - Unauthenticated Use-After-Free via NAPI Instance Access

Title source: llm

Description

In the Linux kernel, the following vulnerability has been resolved: netdev: prevent accessing NAPI instances from another namespace The NAPI IDs were not fully exposed to user space prior to the netlink API, so they were never namespaced. The netlink API must ensure that at the very least NAPI instance belongs to the same netns as the owner of the genl sock. napi_by_id() can become static now, but it needs to move because of dev_get_by_napi_id().

References (2)

Core 2

Core References

Patch

https://git.kernel.org/stable/c/b683ba0df11ff563cc237eb1b74d6adfa77226bf

Patch

https://git.kernel.org/stable/c/d1cacd74776895f6435941f86a1130e58f6dd226

Scores

CVSS v3 5.5

EPSS 0.0017

EPSS Percentile 7.0%

Attack Vector LOCAL

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

Details

Status published

Products (9)

linux/Kernel 6.8.0 - 6.12.10linux

Linux/Linux < 6.8

Linux/Linux 27f91aaf49b3a50e5a02ad5fa27b7c453d029a72 - b683ba0df11ff563cc237eb1b74d6adfa77226bf

Linux/Linux 27f91aaf49b3a50e5a02ad5fa27b7c453d029a72 - d1cacd74776895f6435941f86a1130e58f6dd226

Linux/Linux 6.12.10 - 6.12.*

Linux/Linux 6.13

Linux/Linux 6.8

linux/linux_kernel 6.13 rc1 (6 CPE variants)

linux/linux_kernel 6.8 - 6.12.10

Published Jan 21, 2025

Tracked Since Feb 18, 2026