{"schema":"threatline.record/2","record":{"id":"CVE-2026-98616","aliases":[],"summary":"eth: fbnic: reset num_napi when the napi vectors are freed","details":"In the Linux kernel, the following vulnerability has been resolved:\n\neth: fbnic: reset num_napi when the napi vectors are freed\n\nfbn->num_napi is the count of live napi vectors, each of which owns an\nIRQ.  The PM path had freed them without clearing the count.\nfbnic_pm_suspend() tears the datapath down via ndo_stop() and frees the\nIRQs, but leaves netif_running() true so resume knows to re-open.  Resume\nrebuilds the datapath in __fbnic_pm_resume() and fbnic_reset_queues() sets\nnum_napi and __fbnic_open() re-allocates the vectors.\n\nWhen the datapath is torn down but never rebuilt, num_napi is left\npointing at freed vectors under 2 different scenarios:\n - a PCIe error recovery that fails (fbnic_err_slot_reset() ->\n   __fbnic_pm_resume() returns an error -> PCI_ERS_RESULT_DISCONNECT), so\n   .resume never runs; or\n - an __fbnic_open() that fails partway on resume and unwinds, freeing\n   the vectors after fbnic_reset_queues() has already set num_napi.\n\nThe netdev is then running with num_napi > 0 but napi[] freed, and the\neventual remove/unbind close re-enters fbnic_down() -> fbnic_dbg_down()\nand dereferences the freed vectors:\n  BUG: kernel NULL pointer dereference, address: 0000000000000210\n  RIP: fbnic_dbg_down+0x28\n\nClear num_napi when the vectors are freed: in the suspend teardown (a\ngood resume re-establishes it before __fbnic_open()) and on the resume\nopen failure.  A redundant ndo_stop() then walks an empty napi[].  The\nnormal ndo_stop() down/up cycle is untouched and keeps num_napi for the\nnext ndo_open().","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98616","source_modified_at":"2026-10-19T09:22:44.159Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"bc6107771bb4be3009168cfda24d22131c026fe8","lessThan":"c5b5aee41b9f5ed0743344be1c7b544555fa3cb9","status":"affected","versionType":"git"},{"version":"bc6107771bb4be3009168cfda24d22131c026fe8","lessThan":"4f4b767ffea7653a00904383908536e754f8ef5b","status":"affected","versionType":"git"},{"version":"bc6107771bb4be3009168cfda24d22131c026fe8","lessThan":"4bcc4a92c603fe7f062cea22e20da2e0ad6b12c3","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98616","source_modified_at":"2026-10-19T09:22:44.159Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"6.11","status":"affected"},{"version":"0","lessThan":"6.11","status":"unaffected","versionType":"semver"},{"version":"6.18.55","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.9","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98616","source_modified_at":"2026-10-19T09:22:44.159Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"4f4b767ffea7653a00904383908536e754f8ef5b","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98616","source_modified_at":"2026-10-19T09:22:44.159Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"4bcc4a92c603fe7f062cea22e20da2e0ad6b12c3","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.00166,"percentile":0.05524,"score_date":"2026-10-23"},"published_at":"2026-10-18T15:19:36.165Z","modified_at":"2026-10-19T09:22:44.159Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98616","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T09:22:44.159Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98616","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/c5b5aee41b9f5ed0743344be1c7b544555fa3cb9"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/4f4b767ffea7653a00904383908536e754f8ef5b"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/4bcc4a92c603fe7f062cea22e20da2e0ad6b12c3"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-19T09:22:44.159Z","content_hash":"6f8ae81cf0120165db2c96ed7dd17a35de45f215f512a5d74b22b0cddb5663ed"}}