CVE-2020-14351 Use after free in kernel
A local attacker with perf monitoring permissions can exploit a use-after-free flaw in the Linux kernel to corrupt memory and 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-2020-14351?
CVE-2020-14351 is a high-severity use after free vulnerability in Debian Debian Linux, published on 3 Dec 2020. 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 the Linux kernel. A use-after-free memory flaw was found in the perf subsystem allowing a local attacker with permission to monitor perf events to corrupt memory and possibly escalate privileges. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Weakness: CWE-416
Which versions are affected by CVE-2020-14351?
It affects 3 products.
Linux distribution packages (17)
kernel Red Hat:rhel_aus:7.3::server | All versions | 0:3.10.0-514.86.1.el7 |
kernel-abi-whitelists Red Hat:rhel_aus:7.3::server | All versions | 0:3.10.0-514.86.1.el7 |
kernel-debug Red Hat:rhel_aus:7.3::server | All versions | 0:3.10.0-514.86.1.el7 |
kernel-debug-debuginfo Red Hat:rhel_aus:7.3::server | All versions | 0:3.10.0-514.86.1.el7 |
kernel-debug-devel Red Hat:rhel_aus:7.3::server | All versions | 0:3.10.0-514.86.1.el7 |
kernel-debuginfo Red Hat:rhel_aus:7.3::server | All versions | 0:3.10.0-514.86.1.el7 |
kernel-debuginfo-common-x86_64 Red Hat:rhel_aus:7.3::server | All versions | 0:3.10.0-514.86.1.el7 |
kernel-devel Red Hat:rhel_aus:7.3::server | All versions | 0:3.10.0-514.86.1.el7 |
kernel-doc Red Hat:rhel_aus:7.3::server | All versions | 0:3.10.0-514.86.1.el7 |
kernel-tools Red Hat:rhel_aus:7.3::server | All versions | 0:3.10.0-514.86.1.el7 |
kernel-tools-debuginfo Red Hat:rhel_aus:7.3::server | All versions | 0:3.10.0-514.86.1.el7 |
kernel-tools-libs Red Hat:rhel_aus:7.3::server | All versions | 0:3.10.0-514.86.1.el7 |
kernel-tools-libs-devel Red Hat:rhel_aus:7.3::server | All versions | 0:3.10.0-514.86.1.el7 |
perf Red Hat:rhel_aus:7.3::server | All versions | 0:3.10.0-514.86.1.el7 |
perf-debuginfo Red Hat:rhel_aus:7.3::server | All versions | 0:3.10.0-514.86.1.el7 |
python-perf Red Hat:rhel_aus:7.3::server | All versions | 0:3.10.0-514.86.1.el7 |
python-perf-debuginfo Red Hat:rhel_aus:7.3::server | All versions | 0:3.10.0-514.86.1.el7 |
Products include Debian Debian Linux, Linux kernel, Redhat Enterprise Linux.
How do I fix CVE-2020-14351?
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-2020-14351 being exploited?
There is no known exploitation of CVE-2020-14351 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as DEBIAN-CVE-2020-14351, GHSA-969c-xcr8-6f87, RHSA-2021:0848, UBUNTU-CVE-2020-14351.