Vulnerability · Published Mar 23, 2021 · Assigned by redhat

CVE-2021-20219

Medium 5.5

In plain English

A medium-severity security flaw in kernel. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities).

Severity (CVSS NVD)5.5Medium

Exploit odds (30 days)0.4%top 65.5% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
n/a	kernel	kernel 4.18

Weakness: CWE-697

References

https://bugzilla.redhat.com/show_bug.cgi?id=1923738 x_refsource_MISC