{"id":"CVE-2020-12656","details":"gss_mech_free in net/sunrpc/auth_gss/gss_mech_switch.c in the rpcsec_gss_krb5 implementation in the Linux kernel through 5.6.10 lacks certain domain_release calls, leading to a memory leak. Note: This was disputed with the assertion that the issue does not grant any access not already available. It is a problem that on unloading a specific kernel module some memory is leaked, but loading kernel modules is a privileged operation. A user could also write a kernel module to consume any amount of memory they like and load that replicating the effect of this bug","modified":"2026-03-15T22:33:08.561786Z","published":"2020-05-05T06:15:11.120Z","related":["SUSE-SU-2020:14442-1","SUSE-SU-2020:1587-1","SUSE-SU-2020:1596-1","SUSE-SU-2020:1597-1","SUSE-SU-2020:1599-1","SUSE-SU-2020:1602-1","SUSE-SU-2020:1603-1","SUSE-SU-2020:1604-1","SUSE-SU-2020:1605-1","SUSE-SU-2020:1663-1","SUSE-SU-2020:2027-1","SUSE-SU-2020:2105-1","SUSE-SU-2020:2156-1","SUSE-SU-2020:2478-1","SUSE-SU-2020:2487-1","openSUSE-SU-2020:0801-1","openSUSE-SU-2020:0935-1","openSUSE-SU-2021:0242-1"],"references":[{"type":"ADVISORY","url":"http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00022.html"},{"type":"ADVISORY","url":"http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00008.html"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/4483-1/"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/4485-1/"},{"type":"REPORT","url":"https://bugzilla.kernel.org/show_bug.cgi?id=206651"}],"affected":[{"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-12656.json","unresolved_ranges":[{"events":[{"introduced":"0"},{"last_affected":"5.6.10"}]},{"events":[{"introduced":"0"},{"last_affected":"14.04"}]},{"events":[{"introduced":"0"},{"last_affected":"16.04"}]},{"events":[{"introduced":"0"},{"last_affected":"18.04"}]},{"events":[{"introduced":"0"},{"last_affected":"20.04"}]},{"events":[{"introduced":"0"},{"last_affected":"15.1"}]},{"events":[{"introduced":"0"},{"last_affected":"15.2"}]}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}