Cloud Vulnerability DB
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Vulnerability DatabaseCVE-2020-8648
CVE-2020-8648:
Linux Kernel vulnerability analysis and mitigation
Overview
There is a use-after-free vulnerability in the Linux kernel through version 5.5.2 in the n_tty_receive_buf_common function located in drivers/tty/n_tty.c. The vulnerability was discovered in February 2020 (NVD, MITRE).
Technical details
The vulnerability is a race condition in the virtual terminal driver implementation that could result in a use-after-free condition. The issue specifically affects the n_tty_receive_buf_common function in the drivers/tty/n_tty.c file (Ubuntu, Debian).
Impact
A local attacker with access to a virtual terminal could exploit this vulnerability to cause a denial of service (system crash or memory corruption) or potentially escalate privileges on the system (Ubuntu, Debian).
Mitigation and workarounds
The vulnerability has been fixed in multiple Linux distributions through security updates. Ubuntu has released fixes in versions 5.3.0-51.44 for 19.10, 4.15.0-99.100 for 18.04 LTS, and 4.4.0-178.208 for 16.04 LTS. Debian has addressed it in version 4.9.210-1+deb9u1 for Stretch (Ubuntu, Debian).
Additional resources
Source: This report was generated using AI
Related Linux Kernel vulnerabilities:
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