{"id":"CVE-2026-72113","summary":"can: bcm: add missing device refcount for CAN filter removal","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ncan: bcm: add missing device refcount for CAN filter removal\n\nsashiko-bot remarked a problem with a concurrent device unregistration\nin isotp.c which also is present in the bcm.c code. A former fix for raw.c\ncommit c275a176e4b6 (\"can: raw: add missing refcount for memory leak fix\")\nintroduced a netdevice_tracker which solves the issue for bcm.c too.\n\nbcm_release(), bcm_delete_rx_op() and bcm_notifier() relied on\ndev_get_by_index(ifindex) to re-find the device for an rx_op before\nunregistering its filter. If a concurrent NETDEV_UNREGISTER has already\nunlisted the device from the ifindex table, that lookup fails and\ncan_rx_unregister() is silently skipped, leaving a stale CAN filter\npointing at the soon-to-be-freed bcm_op/socket.\n\nHold a netdev_hold()/netdev_put() tracked reference on op-\u003erx_reg_dev\nfrom the moment the rx filter is registered in bcm_rx_setup() until it\nis unregistered in bcm_rx_unreg(), and use that reference directly in\nbcm_release() and bcm_delete_rx_op() instead of re-looking the device\nup by ifindex.","modified":"2026-08-20T03:55:04.137100669Z","published":"2026-08-15T05:52:54.001Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72113.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/04d23061bbf18d5d81022eb21e9d32e99d24468d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/633bda66fbf309f5de5e1ad6defe8e6b1d77a20f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/84aa4807816e405c1bf87114fc63e06d244281ef"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b024c21c9066f6957b7d4a8f2037e4b000c5e041"},{"type":"WEB","url":"https://git.kernel.org/stable/c/bd5232663524e94cc5aad861dca11e3db8e2ab6f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d59948293ea34b6337ce2b5febab8510de70048c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/dcaee869913c7210cd47ed0a8f27349d7bdcdb7b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ee8b36d0faca08f35b889b6e9aa850695e5b8ba9"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72113.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72113"},{"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":"ffd980f976e7fd666c2e61bf8ab35107efd11828"},{"fixed":"bd5232663524e94cc5aad861dca11e3db8e2ab6f"},{"fixed":"ee8b36d0faca08f35b889b6e9aa850695e5b8ba9"},{"fixed":"dcaee869913c7210cd47ed0a8f27349d7bdcdb7b"},{"fixed":"84aa4807816e405c1bf87114fc63e06d244281ef"},{"fixed":"633bda66fbf309f5de5e1ad6defe8e6b1d77a20f"},{"fixed":"b024c21c9066f6957b7d4a8f2037e4b000c5e041"},{"fixed":"04d23061bbf18d5d81022eb21e9d32e99d24468d"},{"fixed":"d59948293ea34b6337ce2b5febab8510de70048c"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72113.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.6.25"},{"fixed":"5.10.265"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.216"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.183"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.148"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.101"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.42"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72113.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}