CVE-2012-5517 Null dereference in n/a

What is CVE-2012-5517?

CVE-2012-5517 is a medium-severity vulnerability in Linux kernel, published on 21 Dec 2012. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

The online_pages function in mm/memory_hotplug.c in the Linux kernel before 3.6 allows local users to cause a denial of service (NULL pointer dereference and system crash) or possibly have unspecified other impact in opportunistic circumstances by using memory that was hot-added by an administrator.

Which versions are affected by CVE-2012-5517?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2012-5517?

Upgrade to a fixed version.

Is CVE-2012-5517 being exploited?

There is no known exploitation of CVE-2012-5517 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2012-5517, GHSA-6v57-gq9p-2vjv.