CVE-2016-9644 Privilege escalation in n/a

What is CVE-2016-9644?

CVE-2016-9644 is a high-severity vulnerability in Linux kernel, published on 28 Nov 2016. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

The __get_user_asm_ex macro in arch/x86/include/asm/uaccess.h in the Linux kernel 4.4.22 through 4.4.28 contains extended asm statements that are incompatible with the exception table, which allows local users to obtain root access on non-SMEP platforms via a crafted application. NOTE: this vulnerability exists because of incorrect backporting of the CVE-2016-9178 patch to older kernels.

Weakness: CWE-264

Which versions are affected by CVE-2016-9644?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2016-9644?

Apply the vendor's patch.

Is CVE-2016-9644 being exploited?

There is no known exploitation of CVE-2016-9644 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

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

Also known as GHSA-qx8p-8rg2-4j84, UBUNTU-CVE-2016-9644.