Integer overflow in Linux kernel - CVE-2018-8781

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Main Vulnerability Database Vulnerabilities #VU12338

Integer overflow in Linux kernel - CVE-2018-8781

Published: May 2, 2018 / Updated: May 18, 2020


Vulnerability identifier: #VU12338
CSH Severity: Low
CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2018-8781
CWE-ID: CWE-190
Exploitation vector: Local access
Exploit availability: Public exploit is available

Vulnerability details

The vulnerability allows a local attacker to gain elevated privileges on the target system.

The weakness exists in the udl_fb_mmap function in drivers/gpu/drm/udl/udl_fb.c due to integer overflow. A local attacker can gain full read and write permissions on kernel physical pages and execute arbitrary code.

Successful exploitation of the vulnerability may result in system compromise.

Affected software

Linux kernel
Debian Linux
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power 9
Red Hat Enterprise Linux for IBM System z (Structure A)
SUSE Linux
Ubuntu
openSUSE Leap
linux (Ubuntu package)
linux-hwe (Ubuntu package)
linux-gcp (Ubuntu package)
linux-oem (Ubuntu package)
kernel-alt (Red Hat package)

How to mitigate CVE-2018-8781

Update to version 4.15.1.

linux (Ubuntu package) - addressed in versions 3.13.0-151.201, 4.13.0-45.50
linux-hwe (Ubuntu package) - update to 4.13.0-45.50~16.04.1
linux-gcp (Ubuntu package) - update to 4.13.0-1019.23
linux-oem (Ubuntu package) - update to 4.13.0-1030.33
kernel-alt (Red Hat package) - update to 4.14.0-115.el7a

Links to Public Exploits and PoC-codes

External References

Related Security Bulletins