CVE-2018-20669 Memory corruption in n/a
A local attacker can exploit a missing address check in the i915 driver to overwrite kernel memory, leading to privilege escalation or denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2018-20669?
CVE-2018-20669 is a high-severity memory corruption vulnerability in Canonical Ubuntu Linux, published on 18 Mar 2019. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
An issue where a provided address with access_ok() is not checked was discovered in i915_gem_execbuffer2_ioctl in drivers/gpu/drm/i915/i915_gem_execbuffer.c in the Linux kernel through 4.19.13. A local attacker can craft a malicious IOCTL function call to overwrite arbitrary kernel memory, resulting in a Denial of Service or privilege escalation.
Weakness: CWE-20
Which versions are affected by CVE-2018-20669?
It affects 6 products.
Products include Canonical Ubuntu Linux, Linux kernel, Netapp Cn1610 Firmware, Netapp Hci Management Node, Netapp Snapprotect, Netapp Solidfire.
How do I fix CVE-2018-20669?
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-2018-20669 being exploited?
There is no known exploitation of CVE-2018-20669 in the wild and no public exploit code.
Other vulnerabilities in Canonical Ubuntu Linux
Sources
Also known as A-135368228, ASB-A-135368228, DEBIAN-CVE-2018-20669, GHSA-3jgv-8wx7-rw7p, UBUNTU-CVE-2018-20669.