{"id":"CVE-2021-23133","details":"A race condition in Linux kernel SCTP sockets (net/sctp/socket.c) before 5.12-rc8 can lead to kernel privilege escalation from the context of a network service or an unprivileged process. If sctp_destroy_sock is called without sock_net(sk)-\u003esctp.addr_wq_lock then an element is removed from the auto_asconf_splist list without any proper locking. This can be exploited by an attacker with network service privileges to escalate to root or from the context of an unprivileged user directly if a BPF_CGROUP_INET_SOCK_CREATE is attached which denies creation of some SCTP socket.","modified":"2026-05-18T05:52:44.745580141Z","published":"2021-04-22T18:15:08.123Z","related":["ALSA-2021:4356","SUSE-SU-2021:1887-1","SUSE-SU-2021:1891-1","SUSE-SU-2021:1899-1","SUSE-SU-2021:1912-1","SUSE-SU-2021:1913-1","SUSE-SU-2021:2332-1","SUSE-SU-2021:2344-1","SUSE-SU-2021:2361-1","SUSE-SU-2021:2366-1","SUSE-SU-2021:2367-1","SUSE-SU-2021:2377-1","SUSE-SU-2021:2384-1","SUSE-SU-2021:2387-1","SUSE-SU-2021:2421-1","SUSE-SU-2021:2453-1","SUSE-SU-2021:2460-1","SUSE-SU-2021:2577-1","openSUSE-SU-2024:10728-1","openSUSE-SU-2024:13704-1"],"database_specific":{"unresolved_ranges":[{"source":"CPE_FIELD","cpe":"cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*","extracted_events":[{"last_affected":"9.0"}]},{"source":"CPE_FIELD","cpe":"cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*","extracted_events":[{"last_affected":"32"}]},{"source":"CPE_FIELD","cpe":"cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*","extracted_events":[{"last_affected":"33"}]},{"source":"CPE_FIELD","cpe":"cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*","extracted_events":[{"last_affected":"34"}]},{"source":"CPE_FIELD","cpe":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"4.10"},{"fixed":"4.14.232"},{"introduced":"4.15"},{"fixed":"4.19.189"},{"introduced":"4.20"},{"fixed":"5.4.114"},{"introduced":"5.5"},{"fixed":"5.10.32"},{"introduced":"5.11"},{"fixed":"5.11.16"}]}]},"references":[{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CUX2CA63453G34C6KYVBLJXJXEARZI2X/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PAEQ3H6HKNO6KUCGRZVYSFSAGEUX23JL/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XZASHZVCOFJ4VU2I3BN5W5EPHWJQ7QWX/"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20210611-0008/"},{"type":"FIX","url":"http://www.openwall.com/lists/oss-security/2021/05/10/1"},{"type":"FIX","url":"http://www.openwall.com/lists/oss-security/2021/05/10/2"},{"type":"FIX","url":"http://www.openwall.com/lists/oss-security/2021/05/10/3"},{"type":"FIX","url":"http://www.openwall.com/lists/oss-security/2021/05/10/4"},{"type":"FIX","url":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b166a20b07382b8bc1dcee2a448715c9c2c81b5b"},{"type":"FIX","url":"https://www.openwall.com/lists/oss-security/2021/04/18/2"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git","events":[{"introduced":"0"},{"fixed":"bf05bf16c76bb44ab5156223e1e58e26dfe30a88"},{"fixed":"b166a20b07382b8bc1dcee2a448715c9c2c81b5b"}],"database_specific":{"source":["DESCRIPTION","REFERENCES"],"extracted_events":[{"introduced":"0"},{"fixed":"5.12-rc8"}]}}],"versions":["v5.12-rc2","v5.12-rc1-dontuse","v5.12-rc1","v5.12-rc3","v5.12-rc7","v5.12-rc5","v5.12-rc6","v5.12-rc4","v5.10","v5.11","v5.11-rc3","v5.11-rc7","v5.11-rc6","v5.11-rc5","v5.11-rc1","v5.11-rc4","v5.11-rc2","v5.10-rc1","v5.10-rc7","v5.10-rc4","v5.10-rc3","v5.10-rc6","v5.9","v5.10-rc2","v5.10-rc5","v5.9-rc1","v5.9-rc7","v5.9-rc8","v5.9-rc6","v5.9-rc4","v5.9-rc5","v5.9-rc3","v5.9-rc2","v5.8","v5.7","v5.8-rc2","v5.8-rc1","v5.8-rc7","v5.8-rc5","v5.8-rc3","v5.8-rc4","v5.8-rc6","v5.7-rc4","v5.7-rc7","v5.7-rc1","v5.7-rc3","v5.7-rc2","v5.7-rc5","v5.7-rc6","v5.6","v5.6-rc1","v5.6-rc7","v5.6-rc6","v5.6-rc3","v5.6-rc4","v5.6-rc2","v5.6-rc5","v5.5","v5.5-rc5","v5.5-rc7","v5.5-rc2","v5.5-rc1","v5.4","v5.5-rc4","v5.5-rc3","v5.5-rc6","v5.4-rc1","v5.4-rc6","v5.4-rc3","v5.4-rc4","v5.4-rc8","v5.4-rc7","v5.4-rc5","v5.3","v5.4-rc2","v5.3-rc5","v5.3-rc1","v5.3-rc2","v5.3-rc3","v5.3-rc8","v5.3-rc7","v5.3-rc4","v5.2","v5.3-rc6","v5.2-rc2","v5.2-rc7","v5.2-rc4","v5.2-rc1","v5.2-rc5","v5.2-rc6","v5.2-rc3","v5.1","v5.0-rc8","v5.1-rc7","v5.1-rc1","v5.1-rc6","v5.1-rc5","v5.0","v5.1-rc3","v5.1-rc2","v5.1-rc4","v5.0-rc1","v5.0-rc4","v5.0-rc3","v5.0-rc6","v5.0-rc7","v5.0-rc2","v5.0-rc5","v4.20-rc1","v4.19","v4.20","v4.20-rc7","v4.20-rc5","v4.20-rc6","v4.20-rc4","v4.20-rc2","v4.20-rc3","v4.19-rc2","v4.19-rc8","v4.19-rc4","v4.19-rc1","v4.19-rc7","v4.19-rc6","v4.19-rc5","v4.19-rc3","v4.18","v4.18-rc1","v4.18-rc8","v4.18-rc2","v4.18-rc5","v4.18-rc6","v4.18-rc7","v4.17","v4.18-rc3","v4.18-rc4","v4.17-rc1","v4.17-rc2","v4.17-rc7","v4.17-rc3","v4.17-rc4","v4.16","v4.17-rc6","v4.17-rc5","v4.16-rc7","v4.16-rc4","v4.16-rc1","v4.16-rc2","v4.16-rc5","v4.16-rc3","v4.16-rc6","v4.14","v4.15","v4.15-rc1","v4.15-rc4","v4.15-rc9","v4.15-rc8","v4.15-rc7","v4.15-rc3","v4.15-rc2","v4.15-rc5","v4.15-rc6","v4.14-rc1","v4.14-rc7","v4.14-rc3","v4.13","v4.14-rc8","v4.14-rc4","v4.14-rc6","v4.14-rc2","v4.14-rc5","v4.13-rc2","v4.13-rc1","v4.13-rc3","v4.13-rc7",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