CVE-2014-7822 Denial of service in n/a

High 7.2 Published Updated

Local attackers can crash the Linux kernel via a crafted splice system call on ext4 filesystems, requiring a kernel patch.

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-2014-7822?

CVE-2014-7822 is a high-severity denial of service vulnerability in Linux kernel, published on 16 Mar 2015. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

The implementation of certain splice_write file operations in the Linux kernel before 3.16 does not enforce a restriction on the maximum size of a single file, which allows local users to cause a denial of service (system crash) or possibly have unspecified other impact via a crafted splice system call, as demonstrated by use of a file descriptor associated with an ext4 filesystem.

Weakness: CWE-264

Which versions are affected by CVE-2014-7822?

It affects 1 product.

Linux distribution packages (33)
kernel Red Hat:enterprise_linux:5::clientAll versions0:2.6.18-402.el5
kernel-PAE Red Hat:enterprise_linux:5::clientAll versions0:2.6.18-402.el5
kernel-PAE-debuginfo Red Hat:enterprise_linux:5::clientAll versions0:2.6.18-402.el5
kernel-PAE-devel Red Hat:enterprise_linux:5::clientAll versions0:2.6.18-402.el5
kernel-debug Red Hat:enterprise_linux:5::clientAll versions0:2.6.18-402.el5
kernel-debug-debuginfo Red Hat:enterprise_linux:5::clientAll versions0:2.6.18-402.el5
kernel-debug-devel Red Hat:enterprise_linux:5::clientAll versions0:2.6.18-402.el5
kernel-debuginfo Red Hat:enterprise_linux:5::clientAll versions0:2.6.18-402.el5
kernel-debuginfo-common Red Hat:enterprise_linux:5::clientAll versions0:2.6.18-402.el5
kernel-devel Red Hat:enterprise_linux:5::clientAll versions0:2.6.18-402.el5
kernel-doc Red Hat:enterprise_linux:5::clientAll versions0:2.6.18-402.el5
kernel-headers Red Hat:enterprise_linux:5::clientAll versions0:2.6.18-402.el5
kernel-xen Red Hat:enterprise_linux:5::clientAll versions0:2.6.18-402.el5
kernel-xen-debuginfo Red Hat:enterprise_linux:5::clientAll versions0:2.6.18-402.el5
kernel-xen-devel Red Hat:enterprise_linux:5::clientAll versions0:2.6.18-402.el5
kernel Red Hat:enterprise_linux:5::serverAll versions0:2.6.18-402.el5
kernel-PAE Red Hat:enterprise_linux:5::serverAll versions0:2.6.18-402.el5
kernel-PAE-debuginfo Red Hat:enterprise_linux:5::serverAll versions0:2.6.18-402.el5
kernel-PAE-devel Red Hat:enterprise_linux:5::serverAll versions0:2.6.18-402.el5
kernel-debug Red Hat:enterprise_linux:5::serverAll versions0:2.6.18-402.el5
kernel-debug-debuginfo Red Hat:enterprise_linux:5::serverAll versions0:2.6.18-402.el5
kernel-debug-devel Red Hat:enterprise_linux:5::serverAll versions0:2.6.18-402.el5
kernel-debuginfo Red Hat:enterprise_linux:5::serverAll versions0:2.6.18-402.el5
kernel-debuginfo-common Red Hat:enterprise_linux:5::serverAll versions0:2.6.18-402.el5
kernel-devel Red Hat:enterprise_linux:5::serverAll versions0:2.6.18-402.el5
kernel-doc Red Hat:enterprise_linux:5::serverAll versions0:2.6.18-402.el5
kernel-headers Red Hat:enterprise_linux:5::serverAll versions0:2.6.18-402.el5
kernel-kdump Red Hat:enterprise_linux:5::serverAll versions0:2.6.18-402.el5
kernel-kdump-debuginfo Red Hat:enterprise_linux:5::serverAll versions0:2.6.18-402.el5
kernel-kdump-devel Red Hat:enterprise_linux:5::serverAll versions0:2.6.18-402.el5
kernel-xen Red Hat:enterprise_linux:5::serverAll versions0:2.6.18-402.el5
kernel-xen-debuginfo Red Hat:enterprise_linux:5::serverAll versions0:2.6.18-402.el5
kernel-xen-devel Red Hat:enterprise_linux:5::serverAll versions0:2.6.18-402.el5

Products include Linux kernel.

How do I fix CVE-2014-7822?

Apply the vendor's patch.

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-2014-7822 being exploited?

There is no known exploitation of CVE-2014-7822 in the wild and no public exploit code.

Public exploit code: 1 Exploit-DB entry.

All Linux kernel vulnerabilities

Sources

Also known as DEBIAN-CVE-2014-7822, GHSA-wjhv-8fw8-jxw2, RHSA-2015:0164, UBUNTU-CVE-2014-7822.

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