Vulnerability in Linux Kernel
CVE-2021-20219
A denial of service vulnerability was found in n_tty_receive_char_special in drivers/tty/n_tty.c of the Linux kernel. In this flaw a local attacker with a normal user privilege could delay the loop (due to a changing ldata->read_head, and a missing sanity check) and cause a threat to the system availability.
EPSS: 0.004 (32.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Linux Linux_kernel
- N/a Kernel — versions kernel 4.18
Weakness classification (CWE)
Public proof-of-concept exploits
References
- secalert@redhat.com (Third Party Advisory, x_refsource_MISC, Issue Tracking)
Frequently asked questions
- What is CVE-2021-20219?
- CVE-2021-20219 is a medium-severity vulnerability in Linux Kernel, classified under Incorrect Comparison. CVSS score: 5.5/10. Published 2021-03-23.
- How severe is CVE-2021-20219?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2021-20219 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.