CVE-2018-20124 Memory corruption in n/a

What is CVE-2018-20124?

CVE-2018-20124 is a medium-severity memory corruption vulnerability in Canonical Ubuntu Linux, published on 20 Dec 2018. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

hw/rdma/rdma_backend.c in QEMU allows guest OS users to trigger out-of-bounds access via a PvrdmaSqWqe ring element with a large num_sge value.

Weakness: CWE-125

Which versions are affected by CVE-2018-20124?

It affects 2 products.

Products include Canonical Ubuntu Linux, Qemu Qemu.

How do I fix CVE-2018-20124?

Apply the vendor's patch.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2018-20124 being exploited?

There is no known exploitation of CVE-2018-20124 in the wild and no public exploit code.

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-2018-20124, GHSA-rq7v-8fqq-9fwv.