{"id":"CVE-2026-72116","revision":"4713ad9cd2294bf8a502496d18b47e70","records":[{"revision":"4713ad9cd2294bf8a502496d18b47e70","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-72116","aliases":[],"title":"can: bcm: fix stale rx/tx ops after device removal","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ncan: bcm: fix stale rx/tx ops after device removal\n\nRX: an RX_SETUP update(!) for an existing op skipped can_rx_register()\nunconditionally, even when a concurrent NETDEV_UNREGISTER had already\ntorn down its registration (op->rx_reg_dev == NULL). This silently\ndid not re-enable frame delivery for that updated filter. bcm_rx_setup()\nnow re-registers in that case, while leaving rx_ops with ifindex = 0\n(all CAN devices) which never carry a tracked rx_reg_dev registered as-is.\n\nTX: bcm_notify() only handled bo->rx_ops on NETDEV_UNREGISTER, leaving\ntx_ops with an active cyclic transmission re-arming its hrtimer\nindefinitely to execute bcm_tx_timeout_handler(). Cancelling the hrtimer\nprevents the runaway timer and any injection into a later reused ifindex,\nsince nothing else calls bcm_can_tx() for the op until an explicit\nTX_SETUP update re-arms it.\n\nUnlike bcm_rx_unreg(), which clears the tracked rx_reg_dev for rx_ops,\nthe ifindex is intentionally left unchanged for tx_ops. bcm_tx_setup()\nalways rejects ifindex 0, so clearing it would strand the op: neither a\nlater TX_SETUP (bcm_find_op()) nor TX_DELETE (bcm_delete_tx_op()) could\never find it again, since both require an exact ifindex match.","state":0,"publishedAt":"2026-08-15T05:52:56.26+00:00","modifiedAt":"2026-10-16T18:44:56.837+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/can/bcm.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"ffd980f976e7fd666c2e61bf8ab35107efd11828\",\n                            \"lessThan\": \"d30a36066ed3abefb72ae18901f71841ba18b350\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ffd980f976e7fd666c2e61bf8ab35107efd11828\",\n                            \"lessThan\": \"ca829677ffa2de5d79e06366e19ac1e4f5cc78dd\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ffd980f976e7fd666c2e61bf8ab35107efd11828\",\n                            \"lessThan\": \"9517d8fb0b191398d35b9b7f8c719c1cc7761cb1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ffd980f976e7fd666c2e61bf8ab35107efd11828\",\n                            \"lessThan\": \"60d8a7942f4ed2d975207aaeba1adb576707e53d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ffd980f976e7fd666c2e61bf8ab35107efd11828\",\n                            \"lessThan\": \"f749e4564952d60e96930c09f2be99955d07c22e\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ffd980f976e7fd666c2e61bf8ab35107efd11828\",\n                            \"lessThan\": \"6be3e1fedf03eab36a2c09d755d1171287b2014b\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ffd980f976e7fd666c2e61bf8ab35107efd11828\",\n                            \"lessThan\": \"b31d0933509c5a35c0be5736a2ce8df0d1bf112c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"ffd980f976e7fd666c2e61bf8ab35107efd11828\",\n                            \"lessThan\": \"3b762c0d950383ab7a002686c9136b9aa55d2d70\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"net/can/bcm.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"2.6.25\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"2.6.25\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.265\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.216\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.183\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.148\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.101\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.42\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.1.5\",\n                            \"lessThanOrEqual\": \"7.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H","score":7.1,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/d30a36066ed3abefb72ae18901f71841ba18b350","https://git.kernel.org/stable/c/ca829677ffa2de5d79e06366e19ac1e4f5cc78dd","https://git.kernel.org/stable/c/9517d8fb0b191398d35b9b7f8c719c1cc7761cb1","https://git.kernel.org/stable/c/60d8a7942f4ed2d975207aaeba1adb576707e53d","https://git.kernel.org/stable/c/f749e4564952d60e96930c09f2be99955d07c22e","https://git.kernel.org/stable/c/6be3e1fedf03eab36a2c09d755d1171287b2014b","https://git.kernel.org/stable/c/b31d0933509c5a35c0be5736a2ce8df0d1bf112c","https://git.kernel.org/stable/c/3b762c0d950383ab7a002686c9136b9aa55d2d70"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-72116","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-72116","identifiers":["CVE-2026-72116"]},"retained":false,"historicalAffected":[]}],"coverage":[]}