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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% · 16.0th percentile

Risk Scores

EPSS Score
0.05%
16.0th percentile

Affected Products

VendorProductVersions
Ubuntu:20.04:LTSlinux-raspi25.4.0-1004.4, 5.3.0-1017.19, 5.3.0-1015.17
Ubuntu:18.04:LTSlinux-aws-5.05.0.0-1021.24~18.04.1, *, 5.0.0-1027.30
Ubuntu:18.04:LTSlinux-gcp-5.35.3.0-1020.22~18.04.1, *, *
Ubuntu:Pro:14.04:LTSlinux-azure4.15.0-1175.190~14.04.1, 4.15.0-1174.189~14.04.1, 4.15.0-1173.188~14.04.1
Ubuntu:18.04:LTSlinux-oracle-5.00, *, 5.0.0-1013.18
Ubuntu:18.04:LTSlinux-gcp5.0.0-1021.21~18.04.1, 5.0.0-1025.26~18.04.1, 5.0.0-1026.27~18.04.1
Ubuntu:18.04:LTSlinux-azure-5.35.3.0-1010.11~18.04.1, *, *
Ubuntu:18.04:LTSlinux-gcp-edge5.0.0-1011.11~18.04.1, *, *
Ubuntu:18.04:LTSlinux-hwe-edge5.0.0-19.20~18.04.1, 0, 5.0.0-15.16~18.04.1
Ubuntu:18.04:LTSlinux-oem4.15.0-1015.18, 4.15.0-1017.20, 4.15.0-1021.24
Ubuntu:Pro:14.04:LTSlinux-aws4.4.0-1140.146, 4.4.0-1003.3, 4.4.0-1005.5
Ubuntu:18.04:LTSlinux-azure5.0.0-1031.33, 5.0.0-1036.38, 4.15.0-1012.12
Ubuntu:18.04:LTSlinux-aws-5.3*, 5.3.0-1035.37, 5.3.0-1034.36
Ubuntu:18.04:LTSlinux-azure-edge0, *, 4.18.0-1008.8~18.04.1
Ubuntu:20.04:LTSlinux-riscv5.4.0-24.28, 5.4.0-28.32, 5.4.0-34.38
Ubuntu:16.04:LTSlinux-hwe-edge*, 4.10.0-20.22~16.04.1, 4.10.0-21.23~16.04.1
Ubuntu:18.04:LTSlinux-oracle-5.3*, *, *
Ubuntu:18.04:LTSlinux-gke-4.154.15.0-1072.76, 4.15.0-1070.73, 4.15.0-1069.72
Ubuntu:18.04:LTSlinux-hwe5.0.0-29.31~18.04.1, 0, 4.18.0-14.15~18.04.1
Ubuntu:Pro:14.04:LTSlinux-lts-xenial4.4.0-245.279~14.04.1, 4.4.0-246.280~14.04.1, 4.4.0-248.282~14.04.1

Timeline

References

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