{"id":"CVE-2026-72115","summary":"can: bcm: track a single source interface for ANYDEV timeout/throttle ops","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ncan: bcm: track a single source interface for ANYDEV timeout/throttle ops\n\nAn ANYDEV rx op (ifindex == 0) with an active RX timeout and/or\nthrottle timer has no defined semantics when matching frames arrive\nfrom several interfaces: bcm_rx_handler() can run concurrently for\nthe same op on different CPUs, racing hrtimer_cancel()/\nbcm_rx_starttimer() against bcm_rx_timeout_handler() and causing\nspurious RX_TIMEOUT notifications and last_frames corruption. The\nsame concurrency lets throttled multiplex frames from different\ninterfaces clobber the single rx_ifindex/rx_stamp fields shared by\nthe op.\n\nAdd op-\u003eif_detected to track the first interface that delivers a\nmatching frame while a timeout/throttle timer is configured, and\nreject frames from any other interface for that op. The claim is\ndecided in bcm_rx_handler() before hrtimer_cancel() touches\nop-\u003etimer, so a rejected frame can never disturb the claimed\ninterface's watchdog. RTR-mode ops are excluded via RX_RTR_FRAME,\nindependent of kt_ival1/kt_ival2, since those may briefly hold a\nstale value from an earlier non-RTR configuration.\n\nThe claim is released in bcm_notify() on NETDEV_UNREGISTER and in\nbcm_rx_setup() when SETTIMER reconfigures the timer values.\n\nA (re-)claim is only possible on CAN devices in NETREG_REGISTERED\ndev-\u003ereg_state to cover the release in bcm_notify() where reg_state\nbecomes NETREG_UNREGISTERING until synchronize_net().","modified":"2026-08-21T03:30:13.447803442Z","published":"2026-08-15T05:52:55.524Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72115.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/03dfe347c398fa41a7e30e8dc538f12568c183e6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/18b45251e74e35668f0dd0c470549384ae191ecf"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2f5976f54a04e9f18b25283036ac3136be453b17"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3ff8c24b421070a2db99a5cdb86edc9ff339418e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/57cf104da4cf450ae9c16801a3164604b801d2cc"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b6317022b685a430a3ae420456716e3c0c02ef4b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/eca8b44d51fc6ab61022258ec968e55e3073b79e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f147f48837cb1426521f5b3c3b3134c71128a25d"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72115.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72115"},{"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":"f147f48837cb1426521f5b3c3b3134c71128a25d"},{"fixed":"57cf104da4cf450ae9c16801a3164604b801d2cc"},{"fixed":"03dfe347c398fa41a7e30e8dc538f12568c183e6"},{"fixed":"18b45251e74e35668f0dd0c470549384ae191ecf"},{"fixed":"3ff8c24b421070a2db99a5cdb86edc9ff339418e"},{"fixed":"eca8b44d51fc6ab61022258ec968e55e3073b79e"},{"fixed":"b6317022b685a430a3ae420456716e3c0c02ef4b"},{"fixed":"2f5976f54a04e9f18b25283036ac3136be453b17"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72115.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-2026-72115.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N"}]}