CVE-2018-7755 Information disclosure in n/a

What is CVE-2018-7755?

CVE-2018-7755 is a medium-severity vulnerability in Canonical Ubuntu Linux, published on 8 Mar 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 fd_locked_ioctl function in drivers/block/floppy.c in the Linux kernel through 4.15.7. The floppy driver will copy a kernel pointer to user memory in response to the FDGETPRM ioctl. An attacker can send the FDGETPRM ioctl and use the obtained kernel pointer to discover the location of kernel code and data and bypass kernel security protections such as KASLR.

Weakness: CWE-200

Which versions are affected by CVE-2018-7755?

It affects 2 products.

Products include Canonical Ubuntu Linux, Linux kernel.

How do I fix CVE-2018-7755?

Apply the vendor's patch.

Is CVE-2018-7755 being exploited?

There is no known exploitation of CVE-2018-7755 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-2018-7755, GHSA-446x-f9hh-hqmm, UBUNTU-CVE-2018-7755.