CVE-2012-5532 Denial of service in n/a

Medium 4.9 Published 27 Dec 2012 Updated 6 Aug 2024

Local users can crash the Hyper-V KVP daemon via crafted Netlink messages, causing denial of service in Linux kernels.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: Available

What is CVE-2012-5532?

CVE-2012-5532 is a medium-severity denial of service vulnerability in Linux kernel, published on 27 Dec 2012. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

The main function in tools/hv/hv_kvp_daemon.c in hypervkvpd, as distributed in the Linux kernel before 3.8-rc1, allows local users to cause a denial of service (daemon exit) via a crafted application that sends a Netlink message. NOTE: this vulnerability exists because of an incorrect fix for CVE-2012-2669.

Which versions are affected by CVE-2012-5532?

It affects 1 product.

Linux distribution packages (4)

`hypervkvpd` Red Hat:enterprise_linux:5::server	All versions	`0:0-0.7.el5_9.3`
`hypervkvpd-debuginfo` Red Hat:enterprise_linux:5::server	All versions	`0:0-0.7.el5_9.3`
`hypervkvpd` Red Hat:rhel_virtualization:5::server	All versions	`0:0-0.7.el5_9.3`
`hypervkvpd-debuginfo` Red Hat:rhel_virtualization:5::server	All versions	`0:0-0.7.el5_9.3`

Products include Linux kernel.

How do I fix CVE-2012-5532?

Upgrade to a fixed version.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2012-5532 being exploited?

There is no known exploitation of CVE-2012-5532 in the wild and no public exploit code.

All Linux kernel vulnerabilities

Sources

Also known as GHSA-4mv9-4vrq-h2m3, RHSA-2013:0807.