CVE-2018-6952 Use after free in n/a

High 7.5 Published 13 Feb 2018 Updated 5 Aug 2024

A double free vulnerability in GNU patch allows attackers to execute arbitrary code or cause a denial of service via crafted input.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2018-6952?

CVE-2018-6952 is a high-severity use after free vulnerability in n/a, published on 13 Feb 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A double free exists in the another_hunk function in pch.c in GNU patch through 2.7.6.

Weakness: CWE-415

Which versions are affected by CVE-2018-6952?

It affects 1 product.

Products include Gnu Patch.

How do I fix CVE-2018-6952?

Upgrade to a fixed version.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2018-6952 being exploited?

There is no known exploitation of CVE-2018-6952 in the wild and no public exploit code.

Sources

Also known as ALPINE-CVE-2018-6952, AZL-35104, AZL-6788, CLEANSTART-2026-LO96817, DEBIAN-CVE-2018-6952, ECHO-2151-2f9c-cea7 and 5 more.