CVE-2015-4700 Denial of service in n/a

Medium 4.9 Published Updated

Local attackers can crash the Linux kernel by loading crafted BPF instructions that trigger a JIT compiler convergence issue.

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-2015-4700?

CVE-2015-4700 is a medium-severity denial of service vulnerability in Linux kernel, published on 31 Aug 2015. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

The bpf_int_jit_compile function in arch/x86/net/bpf_jit_comp.c in the Linux kernel before 4.0.6 allows local users to cause a denial of service (system crash) by creating a packet filter and then loading crafted BPF instructions that trigger late convergence by the JIT compiler.

Weakness: CWE-17

Which versions are affected by CVE-2015-4700?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2015-4700?

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-2015-4700 being exploited?

There is no known exploitation of CVE-2015-4700 in the wild and no public exploit code.

All Linux kernel vulnerabilities

Sources

Also known as DEBIAN-CVE-2015-4700, GHSA-rwf7-qw8f-h66g, UBUNTU-CVE-2015-4700.

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