{"api_version":"1","generated_at":"2026-10-21T17:39:16+00:00","cve":"CVE-2026-98347","urls":{"html":"https://cve.report/CVE-2026-98347","api":"https://cve.report/api/cve/CVE-2026-98347.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-98347","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-98347"},"summary":{"title":"IB/IPoIB: Avoid restoring OPER_UP after multicast flush","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-10-06 09:18:27","updated_at":"2026-10-19 10:18:37"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/326f7d34bd7e64de535566b65c0533b640df5a81","name":"https://git.kernel.org/stable/c/326f7d34bd7e64de535566b65c0533b640df5a81","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/188b334a6db36a8e0bfaaf59bc4020639a0f3aad","name":"https://git.kernel.org/stable/c/188b334a6db36a8e0bfaaf59bc4020639a0f3aad","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/5ad925d45f28464a5e043c9620880bb6a030da89","name":"https://git.kernel.org/stable/c/5ad925d45f28464a5e043c9620880bb6a030da89","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b72f38929f4b5aa83161fd3b22a7327207e51ec5","name":"https://git.kernel.org/stable/c/b72f38929f4b5aa83161fd3b22a7327207e51ec5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f973769fb7cb33ba0d4a64b7dcfee0cabaead938","name":"https://git.kernel.org/stable/c/f973769fb7cb33ba0d4a64b7dcfee0cabaead938","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1b11e4b55b41d9e69a8e8d07622614202e2eaca9","name":"https://git.kernel.org/stable/c/1b11e4b55b41d9e69a8e8d07622614202e2eaca9","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1ff3add37c329704ec46181b4ae4f00f9f16ce6f","name":"https://git.kernel.org/stable/c/1ff3add37c329704ec46181b4ae4f00f9f16ce6f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9a141d3dc869d18b2eab35e999f4790a9b84e40f","name":"https://git.kernel.org/stable/c/9a141d3dc869d18b2eab35e999f4790a9b84e40f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98347","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98347","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 344bacca8cd811809fc33a249f2738ab757d327f f973769fb7cb33ba0d4a64b7dcfee0cabaead938 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 344bacca8cd811809fc33a249f2738ab757d327f b72f38929f4b5aa83161fd3b22a7327207e51ec5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 344bacca8cd811809fc33a249f2738ab757d327f 1b11e4b55b41d9e69a8e8d07622614202e2eaca9 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 344bacca8cd811809fc33a249f2738ab757d327f 326f7d34bd7e64de535566b65c0533b640df5a81 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4.7.7 4.8 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4.8","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 4.8 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.271 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.222 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.189 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.158 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.112 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.54 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.8 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"98347","cve":"CVE-2026-98347","epss":"0.001840000","percentile":"0.072960000","score_date":"2026-10-06","updated_at":"2026-10-07 00:14:55"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/infiniband/ulp/ipoib/ipoib.h","drivers/infiniband/ulp/ipoib/ipoib_ib.c","drivers/infiniband/ulp/ipoib/ipoib_multicast.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"f973769fb7cb33ba0d4a64b7dcfee0cabaead938","status":"affected","version":"344bacca8cd811809fc33a249f2738ab757d327f","versionType":"git"},{"lessThan":"b72f38929f4b5aa83161fd3b22a7327207e51ec5","status":"affected","version":"344bacca8cd811809fc33a249f2738ab757d327f","versionType":"git"},{"lessThan":"1b11e4b55b41d9e69a8e8d07622614202e2eaca9","status":"affected","version":"344bacca8cd811809fc33a249f2738ab757d327f","versionType":"git"},{"lessThan":"326f7d34bd7e64de535566b65c0533b640df5a81","status":"affected","version":"344bacca8cd811809fc33a249f2738ab757d327f","versionType":"git"},{"lessThan":"5ad925d45f28464a5e043c9620880bb6a030da89","status":"affected","version":"344bacca8cd811809fc33a249f2738ab757d327f","versionType":"git"},{"lessThan":"188b334a6db36a8e0bfaaf59bc4020639a0f3aad","status":"affected","version":"344bacca8cd811809fc33a249f2738ab757d327f","versionType":"git"},{"lessThan":"1ff3add37c329704ec46181b4ae4f00f9f16ce6f","status":"affected","version":"344bacca8cd811809fc33a249f2738ab757d327f","versionType":"git"},{"lessThan":"9a141d3dc869d18b2eab35e999f4790a9b84e40f","status":"affected","version":"344bacca8cd811809fc33a249f2738ab757d327f","versionType":"git"},{"status":"affected","version":"a289c65ca49d2680a3d797e633e57a45573d1df2","versionType":"git"},{"status":"affected","version":"b81459c78935e4579a577b2366c5f8878d3c7fee","versionType":"git"},{"status":"affected","version":"8a9d8dc9ce83a90bfbbe69181acc4cf1beff46f5","versionType":"git"},{"status":"affected","version":"dfe809702a11bd7fb91c882fb55620e39ce22109","versionType":"git"},{"status":"affected","version":"87160fb51bc343793cc8f5f031a87f1a35aecb82","versionType":"git"},{"status":"affected","version":"749fd55dd210f9676f0d445a6efaaa3bec65174a","versionType":"git"},{"lessThan":"3.3","status":"affected","version":"3.2.84","versionType":"semver"},{"lessThan":"3.11","status":"affected","version":"3.10.105","versionType":"semver"},{"lessThan":"3.13","status":"affected","version":"3.12.65","versionType":"semver"},{"lessThan":"3.17","status":"affected","version":"3.16.39","versionType":"semver"},{"lessThan":"4.5","status":"affected","version":"4.4.24","versionType":"semver"},{"lessThan":"4.8","status":"affected","version":"4.7.7","versionType":"semver"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/infiniband/ulp/ipoib/ipoib.h","drivers/infiniband/ulp/ipoib/ipoib_ib.c","drivers/infiniband/ulp/ipoib/ipoib_multicast.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.8"},{"lessThan":"4.8","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.271","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.222","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.189","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.158","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.112","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.54","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.8","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.271","versionStartIncluding":"4.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.222","versionStartIncluding":"4.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.189","versionStartIncluding":"4.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.158","versionStartIncluding":"4.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.112","versionStartIncluding":"4.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.54","versionStartIncluding":"4.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.8","versionStartIncluding":"4.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3","versionStartIncluding":"4.8","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.2.84","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.10.105","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.12.65","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.16.39","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.4.24","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.7.7","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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."}],"providerMetadata":{"dateUpdated":"2026-10-19T09:17:58.195Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/f973769fb7cb33ba0d4a64b7dcfee0cabaead938"},{"url":"https://git.kernel.org/stable/c/b72f38929f4b5aa83161fd3b22a7327207e51ec5"},{"url":"https://git.kernel.org/stable/c/1b11e4b55b41d9e69a8e8d07622614202e2eaca9"},{"url":"https://git.kernel.org/stable/c/326f7d34bd7e64de535566b65c0533b640df5a81"},{"url":"https://git.kernel.org/stable/c/5ad925d45f28464a5e043c9620880bb6a030da89"},{"url":"https://git.kernel.org/stable/c/188b334a6db36a8e0bfaaf59bc4020639a0f3aad"},{"url":"https://git.kernel.org/stable/c/1ff3add37c329704ec46181b4ae4f00f9f16ce6f"},{"url":"https://git.kernel.org/stable/c/9a141d3dc869d18b2eab35e999f4790a9b84e40f"}],"title":"IB/IPoIB: Avoid restoring OPER_UP after multicast flush","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-98347","datePublished":"2026-10-06T08:46:36.136Z","dateReserved":"2026-09-25T10:25:14.343Z","dateUpdated":"2026-10-19T09:17:58.195Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-06 09:18:27","lastModifiedDate":"2026-10-19 10:18:37","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"98347","Ordinal":"1","Title":"IB/IPoIB: Avoid restoring OPER_UP after multicast flush","CVE":"CVE-2026-98347","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"98347","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"IB/IPoIB: Avoid restoring OPER_UP after multicast flush"}]}}}