{"api_version":"1","generated_at":"2026-07-22T18:47:02+00:00","cve":"CVE-2026-63972","urls":{"html":"https://cve.report/CVE-2026-63972","api":"https://cve.report/api/cve/CVE-2026-63972.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-63972","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-63972"},"summary":{"title":"net: mana: Skip redundant detach on already-detached port","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: mana: Skip redundant detach on already-detached port\n\nWhen mana_per_port_queue_reset_work_handler() runs after a previous\ndetach succeeded but attach failed, the port is left in a detached\nstate with apc->tx_qp and apc->rxqs already freed. Calling\nmana_detach() again unconditionally leads to NULL pointer dereferences\nduring queue teardown.\n\nAdd an early exit in mana_detach() when the port is already in\ndetached state (!netif_device_present) for non-close callers, making\nit safe to call idempotently. This allows the queue reset handler and\nother recovery paths to simply retry mana_attach() without redundant\nteardown.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-07-19 16:17:16","updated_at":"2026-07-20 15:16:59"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"7.5","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.5","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","data":{"baseScore":7.5,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/5b05aa36ee24297d7296ca58dfd8c448d0e4cda3","name":"https://git.kernel.org/stable/c/5b05aa36ee24297d7296ca58dfd8c448d0e4cda3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/7ae590797f9b5c240aaea5773f5f00977a42a846","name":"https://git.kernel.org/stable/c/7ae590797f9b5c240aaea5773f5f00977a42a846","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c4152b4e28b3e550ec99351bf900e2c24c2608cc","name":"https://git.kernel.org/stable/c/c4152b4e28b3e550ec99351bf900e2c24c2608cc","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-63972","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-63972","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected fb9f98e1041a30dd5766620a2a64cb472b54caa9 c4152b4e28b3e550ec99351bf900e2c24c2608cc git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3b194343c25084a8d2fa0c0f2c9e80f3080fd732 7ae590797f9b5c240aaea5773f5f00977a42a846 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3b194343c25084a8d2fa0c0f2c9e80f3080fd732 5b05aa36ee24297d7296ca58dfd8c448d0e4cda3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.18.33 6.18.35 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7.0","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.35 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0.12 7.0.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"63972","cve":"CVE-2026-63972","epss":"0.001980000","percentile":"0.097890000","score_date":"2026-07-20","updated_at":"2026-07-21 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the Linux kernel, the following vulnerability has been resolved:\n\nnet: mana: Skip redundant detach on already-detached port\n\nWhen mana_per_port_queue_reset_work_handler() runs after a previous\ndetach succeeded but attach failed, the port is left in a detached\nstate with apc->tx_qp and apc->rxqs already freed. Calling\nmana_detach() again unconditionally leads to NULL pointer dereferences\nduring queue teardown.\n\nAdd an early exit in mana_detach() when the port is already in\ndetached state (!netif_device_present) for non-close callers, making\nit safe to call idempotently. This allows the queue reset handler and\nother recovery paths to simply retry mana_attach() without redundant\nteardown."}],"metrics":[{"cvssV3_1":{"baseScore":7.5,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"}}],"providerMetadata":{"dateUpdated":"2026-07-20T13:41:57.080Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/c4152b4e28b3e550ec99351bf900e2c24c2608cc"},{"url":"https://git.kernel.org/stable/c/7ae590797f9b5c240aaea5773f5f00977a42a846"},{"url":"https://git.kernel.org/stable/c/5b05aa36ee24297d7296ca58dfd8c448d0e4cda3"}],"title":"net: mana: Skip redundant detach on already-detached port","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-63972","datePublished":"2026-07-19T14:55:58.503Z","dateReserved":"2026-07-19T07:54:57.024Z","dateUpdated":"2026-07-20T13:41:57.080Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-07-19 16:17:16","lastModifiedDate":"2026-07-20 15:16:59","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":3.6}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"63972","Ordinal":"1","Title":"net: mana: Skip redundant detach on already-detached port","CVE":"CVE-2026-63972","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"63972","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: mana: Skip redundant detach on already-detached port\n\nWhen mana_per_port_queue_reset_work_handler() runs after a previous\ndetach succeeded but attach failed, the port is left in a detached\nstate with apc->tx_qp and apc->rxqs already freed. Calling\nmana_detach() again unconditionally leads to NULL pointer dereferences\nduring queue teardown.\n\nAdd an early exit in mana_detach() when the port is already in\ndetached state (!netif_device_present) for non-close callers, making\nit safe to call idempotently. This allows the queue reset handler and\nother recovery paths to simply retry mana_attach() without redundant\nteardown.","Type":"Description","Title":"net: mana: Skip redundant detach on already-detached port"}]}}}