CVE-2020-16119

Use-after-free vulnerability in the Linux kernel exploitable by a local attacker due to reuse of a DCCP socket with an attached dccps_hc_tx_ccid object as a listener after being released. Fixed in Ubuntu Linux kernel 5.4.0-51.56, 5.3.0-68.63, 4.15.0-121.123, 4.4.0-193.224, 3.13.0.182.191 and 3.2.0-149.196.

• CWE-416
• CWE-416

• https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/focal/commit/?id=01872cb896c76cedeabe93a08456976ab55ad695Patch, Third Party Advisory
• https://launchpad.net/bugs/1883840Issue Tracking, Patch, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2021/10/msg00010.htmlMailing List, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2021/12/msg00012.htmlThird Party Advisory
• https://lore.kernel.org/netdev/20201013171849.236025-1-kleber.souza%40canonical.com/T/
• https://security.netapp.com/advisory/ntap-20210304-0006/Third Party Advisory
• https://ubuntu.com/USN-4576-1Third Party Advisory
• https://ubuntu.com/USN-4577-1Third Party Advisory
• https://ubuntu.com/USN-4578-1Third Party Advisory
• https://ubuntu.com/USN-4579-1Third Party Advisory
• https://ubuntu.com/USN-4580-1Third Party Advisory
• https://www.debian.org/security/2021/dsa-4978Third Party Advisory
• https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/focal/commit/?id=01872cb896c76cedeabe93a08456976ab55ad695Patch, Third Party Advisory
• https://launchpad.net/bugs/1883840Issue Tracking, Patch, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2021/10/msg00010.htmlMailing List, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2021/12/msg00012.htmlThird Party Advisory
• https://lore.kernel.org/netdev/20201013171849.236025-1-kleber.souza%40canonical.com/T/
• https://security.netapp.com/advisory/ntap-20210304-0006/Third Party Advisory
• https://ubuntu.com/USN-4576-1Third Party Advisory
• https://ubuntu.com/USN-4577-1Third Party Advisory
• https://ubuntu.com/USN-4578-1Third Party Advisory
• https://ubuntu.com/USN-4579-1Third Party Advisory
• https://ubuntu.com/USN-4580-1Third Party Advisory
• https://www.debian.org/security/2021/dsa-4978Third Party Advisory

Published

Jan 14, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
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