CVE-2025-38377

Technical Description

In the Linux kernel, the following vulnerability has been resolved:

rose: fix dangling neighbour pointers in rose_rt_device_down()

There are two bugs in rose_rt_device_down() that can cause

use-after-free:

1. The loop bound `t->count` is modified within the loop, which can

cause the loop to terminate early and miss some entries.

2. When removing an entry from the neighbour array, the subsequent entries

are moved up to fill the gap, but the loop index `i` is still

incremented, causing the next entry to be skipped.

For example, if a node has three neighbours (A, A, B) with count=3 and A

is being removed, the second A is not checked.

i=0: (A, A, B) -> (A, B) with count=2

^ checked

i=1: (A, B) -> (A, B) with count=2

^ checked (B, not A!)

i=2: (doesn't occur because i < count is false)

This leaves the second A in the array with count=2, but the rose_neigh

structure has been freed. Code that accesses these entries assumes that

the first `

Remediation

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected Products

References