{"id":"CVE-2026-23268","summary":"apparmor: fix unprivileged local user can do privileged policy management","details":"In the Linux kernel, the following vulnerability has been resolved:\n\napparmor: fix unprivileged local user can do privileged policy management\n\nAn unprivileged local user can load, replace, and remove profiles by\nopening the apparmorfs interfaces, via a confused deputy attack, by\npassing the opened fd to a privileged process, and getting the\nprivileged process to write to the interface.\n\nThis does require a privileged target that can be manipulated to do\nthe write for the unprivileged process, but once such access is\nachieved full policy management is possible and all the possible\nimplications that implies: removing confinement, DoS of system or\ntarget applications by denying all execution, by-passing the\nunprivileged user namespace restriction, to exploiting kernel bugs for\na local privilege escalation.\n\nThe policy management interface can not have its permissions simply\nchanged from 0666 to 0600 because non-root processes need to be able\nto load policy to different policy namespaces.\n\nInstead ensure the task writing the interface has privileges that\nare a subset of the task that opened the interface. This is already\ndone via policy for confined processes, but unconfined can delegate\naccess to the opened fd, by-passing the usual policy check.","modified":"2026-04-03T11:02:17.992349Z","published":"2026-03-18T17:54:41.974Z","related":["SUSE-SU-2026:0961-1","SUSE-SU-2026:0962-1","SUSE-SU-2026:0984-1","SUSE-SU-2026:1003-1","SUSE-SU-2026:1041-1","SUSE-SU-2026:1077-1","SUSE-SU-2026:1078-1","SUSE-SU-2026:1081-1","SUSE-SU-2026:1131-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23268.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0fc63dd9170643d15c25681fca792539e23f4640"},{"type":"WEB","url":"https://git.kernel.org/stable/c/17debf5586020790b5717f96e5e6a3ca5bb961ab"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6601e13e82841879406bf9f369032656f441a425"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b60b3f7a35c46b2e0ca934f9c988b8fca06d76c6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b6a94eeca9c6c8f7c55ad44c62c98324f51ec596"},{"type":"WEB","url":"https://www.qualys.com/2026/03/10/crack-armor.txt"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23268.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-23268"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"b7fd2c0340eacbee892425e9007647568b7f2a3c"},{"fixed":"17debf5586020790b5717f96e5e6a3ca5bb961ab"},{"fixed":"0fc63dd9170643d15c25681fca792539e23f4640"},{"fixed":"b60b3f7a35c46b2e0ca934f9c988b8fca06d76c6"},{"fixed":"b6a94eeca9c6c8f7c55ad44c62c98324f51ec596"},{"fixed":"6601e13e82841879406bf9f369032656f441a425"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-23268.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"4.11.0"},{"fixed":"6.6.130"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.77"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.18"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"6.19.8"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-23268.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}