CVE-2021-20219
Last modified
CVE-2021-20219 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. 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 estimates a 0.40% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | < 4.18 |
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1923738Issue Tracking, Third Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=1923738Issue Tracking, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
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