{"id":"CVE-2026-97603","revision":"3775d7f6cfb84eca814f20a790af96a8","records":[{"revision":"3775d7f6cfb84eca814f20a790af96a8","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-97603","aliases":[],"title":"idpf: disable DIM work before freeing q_vectors","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nidpf: disable DIM work before freeing q_vectors\n\nidpf never drains the Tx/Rx DIM works before freeing the memory they\nlive in.  tx_dim and rx_dim are embedded in struct idpf_q_vector, they\nare queued from the NAPI poll via net_dim(), and idpf_vport_intr_rel()\nends with kfree(rsrc->q_vectors).  Nothing in the driver cancels them.\n\nidpf_tx_dim_work() and idpf_rx_dim_work() then run on freed memory:\nidpf_vport_intr_write_itr() writes the ITR register through\nq_vector->intr_reg.tx_itr / rx_itr, void __iomem pointers loaded out of\nthe freed q_vector.  No configuration is needed to get there --\nIDPF_ITR_IS_DYNAMIC() is defined as (itr_mode) and idpf_vport_alloc()\ninitialises both modes to IDPF_ITR_DYNAMIC.\n\nDraining after idpf_vport_intr_napi_dis_all() is not enough on its own.\nidpf_net_dim() is called from inside the\n\"if (napi_complete_done(napi, work_done))\" branch of the poll, and\nnapi_complete_done() has already cleared NAPIF_STATE_SCHED by then.\nnapi_disable_locked() waits only while (val & (NAPIF_STATE_SCHED |\nNAPIF_STATE_NPSVC)), so napi_disable() can return while the poll tail is\nstill queueing the work, and a plain cancel_work_sync() would be\nre-armed behind the drain.\n\nUse disable_work_sync(): schedule_work() on a work with a non-zero\ndisable count is dropped by clear_pending_if_disabled() before\n__queue_work() is reached.\n\nMove idpf_init_dim() to idpf_vport_intr_alloc() so the works are\ninitialised on every path that can reach the drain -- the three\n\"goto intr_deinit\" sites between idpf_vport_intr_init() and\nidpf_vport_intr_ena() get there without the enable side having run.\nNothing re-enables them: rsrc->q_vectors is freed on every exit from\nidpf_vport_open() and on every idpf_vport_stop(), so the count dies with\nthe object.\n\nIt is a race, not a deterministic failure -- net_dim() only schedules\nonce DIM_NEVENTS events have accumulated and the profile index changes.\nA KASAN ifup/ifdown loop under load is the way to see it.","state":0,"publishedAt":"2026-09-25T10:22:16.015+00:00","modifiedAt":"2026-10-19T09:10:07.248+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                        \"drivers/net/ethernet/intel/idpf/idpf_txrx.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"c2d548cad1508d334517bcbd7cd5c915cc831fc0\",\n                            \"lessThan\": \"7d64d4c6bb6bb63b6cdb7de133c3ec48333b27b5\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c2d548cad1508d334517bcbd7cd5c915cc831fc0\",\n                            \"lessThan\": \"7e4312953788244d47074987d40d76702cf929f1\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c2d548cad1508d334517bcbd7cd5c915cc831fc0\",\n                            \"lessThan\": \"cd7a1598645b6917a8676b7e2efe8d97ce68a952\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"c2d548cad1508d334517bcbd7cd5c915cc831fc0\",\n                            \"lessThan\": \"7dd4c829bac2916be98a3e34b41daaba7f42b4c4\",\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                        \"drivers/net/ethernet/intel/idpf/idpf_txrx.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"6.7\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"6.7\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.112\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.53\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.7\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/7d64d4c6bb6bb63b6cdb7de133c3ec48333b27b5","https://git.kernel.org/stable/c/7e4312953788244d47074987d40d76702cf929f1","https://git.kernel.org/stable/c/cd7a1598645b6917a8676b7e2efe8d97ce68a952","https://git.kernel.org/stable/c/7dd4c829bac2916be98a3e34b41daaba7f42b4c4"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-97603","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-97603","identifiers":["CVE-2026-97603"]},"retained":false,"historicalAffected":[]}],"coverage":[]}