CVE-2016-3157 Privilege escalation in n/a

What is CVE-2016-3157?

CVE-2016-3157 is a high-severity vulnerability in Canonical Ubuntu Linux, published on 12 Apr 2016. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

The __switch_to function in arch/x86/kernel/process_64.c in the Linux kernel does not properly context-switch IOPL on 64-bit PV Xen guests, which allows local guest OS users to gain privileges, cause a denial of service (guest OS crash), or obtain sensitive information by leveraging I/O port access.

Weakness: CWE-264

Which versions are affected by CVE-2016-3157?

It affects 2 products.

Products include Canonical Ubuntu Linux, Xen Xen.

How do I fix CVE-2016-3157?

Apply the vendor's patch.

Is CVE-2016-3157 being exploited?

There is no known exploitation of CVE-2016-3157 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-2016-3157, GHSA-jpwx-jg65-3x5w, UBUNTU-CVE-2016-3157.