VDB
CVE-2021-20219
CVE-2021-20219
PUBLISHED
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 0.05% · 16.5th percentile
Risk Scores
EPSS Score
0.05%
16.5th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:20.04:LTS | linux-raspi2 | 5.3.0-1007.8, 0, 5.4.0-1006.6 |
| Ubuntu:18.04:LTS | linux-aws-5.0 | 0, 5.0.0-1022.25~18.04.1, * |
| Ubuntu:18.04:LTS | linux-gcp-5.3 | 5.3.0-1008.9~18.04.1, 5.3.0-1017.18~18.04.1, 5.3.0-1018.19~18.04.1 |
| Ubuntu:Pro:14.04:LTS | linux-azure | 4.15.0-1045.49~14.04.1, *, * |
| Ubuntu:18.04:LTS | linux-oracle-5.0 | 5.0.0-1013.18, *, 0 |
| Ubuntu:18.04:LTS | linux-gcp | 4.15.0-1026.27, 4.15.0-1009.9, 4.15.0-1040.42 |
| Ubuntu:18.04:LTS | linux-azure-5.3 | 5.3.0-1018.19~18.04.1, 5.3.0-1019.20~18.04.1, 5.3.0-1020.21~18.04.1 |
| Ubuntu:18.04:LTS | linux-gcp-edge | 4.18.0-1008.9~18.04.1, 4.18.0-1009.10~18.04.1, 4.18.0-1012.13~18.04.1 |
| Ubuntu:18.04:LTS | linux-hwe-edge | *, 5.0.0-15.16~18.04.1, 0 |
| Ubuntu:18.04:LTS | linux-oem | 4.15.0-1017.20, 4.15.0-1021.24, 4.15.0-1024.29 |
| Ubuntu:Pro:14.04:LTS | linux-aws | 4.4.0-1092.96, 0, 4.4.0-1003.3 |
| Ubuntu:18.04:LTS | linux-azure | 5.0.0-1032.34, 5.0.0-1035.37, 5.0.0-1031.33 |
| Ubuntu:18.04:LTS | linux-aws-5.3 | 5.3.0-1034.36, 0, 5.3.0-1016.17~18.04.1 |
| Ubuntu:18.04:LTS | linux-azure-edge | 4.18.0-1008.8~18.04.1, *, * |
| Ubuntu:20.04:LTS | linux-riscv | 5.4.0-34.38, 5.4.0-26.30, 5.4.0-40.45 |
| Ubuntu:16.04:LTS | linux-hwe-edge | 4.15.0-15.16~16.04.1, 4.15.0-20.21~16.04.1, 4.15.0-22.24~16.04.1 |
| Ubuntu:18.04:LTS | linux-oracle-5.3 | 0, 5.3.0-1014.15~18.04.1, 5.3.0-1016.18~18.04.1 |
| Ubuntu:18.04:LTS | linux-gke-4.15 | 4.15.0-1036.38, 0, 4.15.0-1030.32 |
| Ubuntu:18.04:LTS | linux-hwe | 4.18.0-25.26~18.04.1, 4.18.0-24.25~18.04.1, 4.18.0-22.23~18.04.1 |
| Ubuntu:Pro:14.04:LTS | linux-lts-xenial | *, *, * |
Timeline
- Mar 23, 2021 CVE Published
- Apr 14, 2021 EPSS Score
- Jun 23, 2021 EPSS Score
- Aug 24, 2021 EPSS Score
- Oct 26, 2021 EPSS Score
- Dec 27, 2021 EPSS Score
- Feb 28, 2022 EPSS Score
- Apr 1, 2022 EPSS Score
- May 1, 2022 EPSS Score
- Jul 3, 2022 EPSS Score
- Sep 4, 2022 EPSS Score
- Nov 6, 2022 EPSS Score
References
- https://ubuntu.com/security/CVE-2021-20219 third-party-advisory
- https://www.openwall.com/lists/oss-security/2021/03/17/10 third-party-advisory
- https://www.openwall.com/lists/oss-security/2021/03/17/16 third-party-advisory
- https://www.cve.org/CVERecord?id=CVE-2021-20219 third-party-advisory