{"id":"CVE-2025-38665","summary":"can: netlink: can_changelink(): fix NULL pointer deref of struct can_priv::do_set_mode","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ncan: netlink: can_changelink(): fix NULL pointer deref of struct can_priv::do_set_mode\n\nAndrei Lalaev reported a NULL pointer deref when a CAN device is\nrestarted from Bus Off and the driver does not implement the struct\ncan_priv::do_set_mode callback.\n\nThere are 2 code path that call struct can_priv::do_set_mode:\n- directly by a manual restart from the user space, via\n  can_changelink()\n- delayed automatic restart after bus off (deactivated by default)\n\nTo prevent the NULL pointer deference, refuse a manual restart or\nconfigure the automatic restart delay in can_changelink() and report\nthe error via extack to user space.\n\nAs an additional safety measure let can_restart() return an error if\ncan_priv::do_set_mode is not set instead of dereferencing it\nunchecked.","modified":"2026-04-02T12:48:04.689545Z","published":"2025-08-22T16:02:57.458Z","related":["SUSE-SU-2025:03272-1","SUSE-SU-2025:03290-1","SUSE-SU-2025:03301-1","SUSE-SU-2025:03382-1","SUSE-SU-2025:03602-1","SUSE-SU-2025:03614-1","SUSE-SU-2025:03633-1","SUSE-SU-2025:03634-1","SUSE-SU-2025:20653-1","SUSE-SU-2025:20669-1","SUSE-SU-2025:20739-1","SUSE-SU-2025:20756-1","SUSE-SU-2025:21074-1","SUSE-SU-2025:21139-1","SUSE-SU-2025:21179-1","openSUSE-SU-2025:20081-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38665.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0ca816a96fdcf32644c80cbe7a82c7b6ce6ddda5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6acceb46180f9e160d4f0c56fcaf39ba562822ae"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6bbcf37c5114926c99a1d1e6993a5b35689d2599"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c1f3f9797c1f44a762e6f5f72520b2e520537b52"},{"type":"WEB","url":"https://git.kernel.org/stable/c/cf81a60a973358dea163f6b14062f17831ceb894"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38665.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-38665"},{"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":"39549eef3587f1c1e8c65c88a2400d10fd30ea17"},{"fixed":"6bbcf37c5114926c99a1d1e6993a5b35689d2599"},{"fixed":"cf81a60a973358dea163f6b14062f17831ceb894"},{"fixed":"0ca816a96fdcf32644c80cbe7a82c7b6ce6ddda5"},{"fixed":"6acceb46180f9e160d4f0c56fcaf39ba562822ae"},{"fixed":"c1f3f9797c1f44a762e6f5f72520b2e520537b52"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-38665.json"}}],"schema_version":"1.7.5"}