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Linux Kernel Null Dereference Vulnerability in /proc/pid/smaps_rollup

Vulnerability

A null dereference vulnerability has been introduced in the Linux kernel's handling of the /proc/pid/smaps_rollup file. This issue arises when there are no virtual memory areas (VMAs) in the task, leading to a crash. The vulnerability was introduced in a previous commit that changed the way memory mapping information is processed.

Impact

Exploitation of this vulnerability leads to a null pointer dereference, causing a kernel crash.

Remediation

Users can upgrade to the latest version of the Linux kernel to address this vulnerability.

Added: Sep 18, 2025, 4:01 PM
Updated: Sep 18, 2025, 4:01 PM

Vulnerability Rating

Custom Algorithm
spread
9.0
impact
2.5
exploitability
5.3
remediation
7.7
relevance
0.5
threat
3.2
urgency
2.9
incentive
1.7

Our algorithm analyzes dozens of metrics to generate these 8 key vulnerability categories, which are then combined to calculate the overall risk score.