{"schema":"threatline.record/2","record":{"id":"CVE-2026-98347","aliases":[],"summary":"IB/IPoIB: Avoid restoring OPER_UP after multicast flush","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nIB/IPoIB: Avoid restoring OPER_UP after multicast flush\n\nipoib_ib_dev_flush_light() temporarily clears IPOIB_FLAG_OPER_UP to\nprevent multicast joins while ipoib_mcast_dev_flush() is running, and\nrestores the flag afterwards if it was previously set.\n\nThis restore races with ipoib_ib_dev_down(). If the interface is brought\ndown while the flush is in progress, ipoib_ib_dev_down() clears\nIPOIB_FLAG_OPER_UP, but the flush path may set it again after the device\nhas already gone down.\n\nSince commit 894021a75291 (\"IB/ipoib: Make the carrier_on_task race\naware\"), ipoib_mcast_carrier_on_task() relies on IPOIB_FLAG_OPER_UP\nbeing cleared to terminate its rtnl_trylock() retry loop. If the flag is\nleft set after shutdown, the workqueue retries forever, causing teardown\nto deadlock when ipoib_ndo_uninit() waits in destroy_workqueue() while\nholding RTNL.\n\nInstead of overloading IPOIB_FLAG_OPER_UP to block multicast joins\nduring a light flush, introduce a dedicated IPOIB_FLAG_MCAST_FLUSH flag.\nUse it together with IPOIB_FLAG_OPER_UP to determine whether multicast\njoins are allowed, avoiding the race with device shutdown.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98347","source_modified_at":"2026-10-19T09:17:58.195Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"344bacca8cd811809fc33a249f2738ab757d327f","lessThan":"f973769fb7cb33ba0d4a64b7dcfee0cabaead938","status":"affected","versionType":"git"},{"version":"344bacca8cd811809fc33a249f2738ab757d327f","lessThan":"b72f38929f4b5aa83161fd3b22a7327207e51ec5","status":"affected","versionType":"git"},{"version":"344bacca8cd811809fc33a249f2738ab757d327f","lessThan":"1b11e4b55b41d9e69a8e8d07622614202e2eaca9","status":"affected","versionType":"git"},{"version":"344bacca8cd811809fc33a249f2738ab757d327f","lessThan":"326f7d34bd7e64de535566b65c0533b640df5a81","status":"affected","versionType":"git"},{"version":"344bacca8cd811809fc33a249f2738ab757d327f","lessThan":"5ad925d45f28464a5e043c9620880bb6a030da89","status":"affected","versionType":"git"},{"version":"344bacca8cd811809fc33a249f2738ab757d327f","lessThan":"188b334a6db36a8e0bfaaf59bc4020639a0f3aad","status":"affected","versionType":"git"},{"version":"344bacca8cd811809fc33a249f2738ab757d327f","lessThan":"1ff3add37c329704ec46181b4ae4f00f9f16ce6f","status":"affected","versionType":"git"},{"version":"344bacca8cd811809fc33a249f2738ab757d327f","lessThan":"9a141d3dc869d18b2eab35e999f4790a9b84e40f","status":"affected","versionType":"git"},{"version":"a289c65ca49d2680a3d797e633e57a45573d1df2","status":"affected","versionType":"git"},{"version":"b81459c78935e4579a577b2366c5f8878d3c7fee","status":"affected","versionType":"git"},{"version":"8a9d8dc9ce83a90bfbbe69181acc4cf1beff46f5","status":"affected","versionType":"git"},{"version":"dfe809702a11bd7fb91c882fb55620e39ce22109","status":"affected","versionType":"git"},{"version":"87160fb51bc343793cc8f5f031a87f1a35aecb82","status":"affected","versionType":"git"},{"version":"749fd55dd210f9676f0d445a6efaaa3bec65174a","status":"affected","versionType":"git"},{"version":"3.2.84","lessThan":"3.3","status":"affected","versionType":"semver"},{"version":"3.10.105","lessThan":"3.11","status":"affected","versionType":"semver"},{"version":"3.12.65","lessThan":"3.13","status":"affected","versionType":"semver"},{"version":"3.16.39","lessThan":"3.17","status":"affected","versionType":"semver"},{"version":"4.4.24","lessThan":"4.5","status":"affected","versionType":"semver"},{"version":"4.7.7","lessThan":"4.8","status":"affected","versionType":"semver"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98347","source_modified_at":"2026-10-19T09:17:58.195Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"4.8","status":"affected"},{"version":"0","lessThan":"4.8","status":"unaffected","versionType":"semver"},{"version":"5.10.271","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.222","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.189","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.158","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.112","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.54","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.8","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE 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