CVE-2018-17182 Use after free in n/a

What is CVE-2018-17182?

CVE-2018-17182 is a high-severity use after free vulnerability in Canonical Ubuntu Linux, published on 19 Sep 2018. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

An issue was discovered in the Linux kernel through 4.18.8. The vmacache_flush_all function in mm/vmacache.c mishandles sequence number overflows. An attacker can trigger a use-after-free (and possibly gain privileges) via certain thread creation, map, unmap, invalidation, and dereference operations.

Weakness: CWE-416

Which versions are affected by CVE-2018-17182?

It affects 5 products.

Products include Canonical Ubuntu Linux, Debian Debian Linux, Linux kernel, Netapp Active Iq Performance Analytics Services, Netapp Element Software.

How do I fix CVE-2018-17182?

Apply the vendor's patch.

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-2018-17182 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2018-17182 exists.

Public exploit code: 2 Exploit-DB entries and 4 proofs of concept on GitHub.

Other vulnerabilities in Canonical Ubuntu Linux

• CVE-2020-11651 SaltStack Salt Authentication Bypass Exploited Critical 9.8
• CVE-2020-7247 OpenSMTPD Remote Code Execution Exploited Critical 9.8
• CVE-2019-16928 Exim Out-of-bounds Write Exploited Critical 9.8
• CVE-2018-6789 Exim Buffer Overflow Exploited Critical 9.8
• CVE-2015-2590 Oracle Java SE and Java SE Embedded Remote Code Execution Exploited Critical 9.8

All Canonical Ubuntu Linux vulnerabilities

Sources

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

Also known as DEBIAN-CVE-2018-17182, GHSA-v788-jmxr-wgj9, SUSE-SU-2018:3032-1, SUSE-SU-2018:3032-2, SUSE-SU-2018:3100-1, UBUNTU-CVE-2018-17182.