CVE-2020-8648 Use after free in n/a

What is CVE-2020-8648?

CVE-2020-8648 is a high-severity use after free vulnerability in Canonical Ubuntu Linux, published on 6 Feb 2020. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

There is a use-after-free vulnerability in the Linux kernel through 5.5.2 in the n_tty_receive_buf_common function in drivers/tty/n_tty.c.

Weakness: CWE-416

Which versions are affected by CVE-2020-8648?

It affects 9 products.

Products include Broadcom Brocade Fabric Operating System Firmware, Canonical Ubuntu Linux, Debian Debian Linux, Linux kernel, Netapp Active Iq Unified Manager, Netapp Cloud Backup and 3 more.

How do I fix CVE-2020-8648?

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-2020-8648 being exploited?

There is no known exploitation of CVE-2020-8648 in the wild and no public exploit code.

Other vulnerabilities in Canonical Ubuntu Linux

• CVE-2023-27534 Path traversal in https://github.com/curl/curl High 8.8
• CVE-2021-4197 Privilege escalation in kernel High 7.8
• CVE-2023-27538 Auth bypass in https://github.com/curl/curl High 7.7
• CVE-2021-27218 Integer overflow in n/a High 7.5
• CVE-2021-27219 Integer overflow in n/a High 7.5

All Canonical Ubuntu Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2020-8648, GHSA-9hr4-45xh-6xvh, UBUNTU-CVE-2020-8648.