CVE-2020-25668 Use after free in Linux Kernel
A use-after-free flaw in the Linux Kernel console driver allows local attackers to execute arbitrary code or escalate privileges.
- 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-2020-25668?
CVE-2020-25668 is a high-severity use after free vulnerability in Debian Debian Linux, published on 26 May 2021. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A flaw was found in Linux Kernel because access to the global variable fg_console is not properly synchronized leading to a use after free in con_font_op.
Which versions are affected by CVE-2020-25668?
It affects 15 products.
Linux distribution packages (2)
kgraft-patch-SLE12-SP5_Update_12 SUSE:Linux Enterprise Live Patching 12 SP5 | All versions | 2-2.1 |
kernel-livepatch-SLE15-SP2_Update_7 SUSE:Linux Enterprise Live Patching 15 SP2 | All versions | 2-2.1 |
Products include Debian Debian Linux, Linux kernel, Netapp 500f Firmware, Netapp A250 Firmware, Netapp Cloud Backup, Netapp H300e Firmware and 9 more.
How do I fix CVE-2020-25668?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2020-25668 being exploited?
There is no known exploitation of CVE-2020-25668 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as A-190228658, DEBIAN-CVE-2020-25668, PUB-A-190228658, SUSE-SU-2020:3698-1, UBUNTU-CVE-2020-25668.