{"api_version":"1","generated_at":"2026-04-09T04:32:58+00:00","cve":"CVE-2026-23392","urls":{"html":"https://cve.report/CVE-2026-23392","api":"https://cve.report/api/cve/CVE-2026-23392.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-23392","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-23392"},"summary":{"title":"netfilter: nf_tables: release flowtable after rcu grace period on error","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_tables: release flowtable after rcu grace period on error\n\nCall synchronize_rcu() after unregistering the hooks from error path,\nsince a hook that already refers to this flowtable can be already\nregistered, exposing this flowtable to packet path and nfnetlink_hook\ncontrol plane.\n\nThis error path is rare, it should only happen by reaching the maximum\nnumber hooks or by failing to set up to hardware offload, just call\nsynchronize_rcu().\n\nThere is a check for already used device hooks by different flowtable\nthat could result in EEXIST at this late stage. The hook parser can be\nupdated to perform this check earlier to this error path really becomes\nrarely exercised.\n\nUncovered by KASAN reported as use-after-free from nfnetlink_hook path\nwhen dumping hooks.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-03-25 11:16:39","updated_at":"2026-04-02 15:16:33"},"problem_types":[],"metrics":[{"version":"3.1","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"7.8","severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","data":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"references":[{"url":"https://git.kernel.org/stable/c/adee3436ccd29f1e514c028899e400cbc6d84065","name":"https://git.kernel.org/stable/c/adee3436ccd29f1e514c028899e400cbc6d84065","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d73f4b53aaaea4c95f245e491aa5eeb8a21874ce","name":"https://git.kernel.org/stable/c/d73f4b53aaaea4c95f245e491aa5eeb8a21874ce","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/7e3955b282eae20d61c75e499c75eade51c20060","name":"https://git.kernel.org/stable/c/7e3955b282eae20d61c75e499c75eade51c20060","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d2632de96ccb066e0131ad1494241b9c281c60b8","name":"https://git.kernel.org/stable/c/d2632de96ccb066e0131ad1494241b9c281c60b8","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e78a2dcc7cfb87b64a631441ca7681492b347ef6","name":"https://git.kernel.org/stable/c/e78a2dcc7cfb87b64a631441ca7681492b347ef6","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c8092edb9a11f20f95ccceeb9422b7dd0df337bd","name":"https://git.kernel.org/stable/c/c8092edb9a11f20f95ccceeb9422b7dd0df337bd","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-23392","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-23392","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3b49e2e94e6ebb8b23d0955d9e898254455734f8 d2632de96ccb066e0131ad1494241b9c281c60b8 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3b49e2e94e6ebb8b23d0955d9e898254455734f8 adee3436ccd29f1e514c028899e400cbc6d84065 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3b49e2e94e6ebb8b23d0955d9e898254455734f8 7e3955b282eae20d61c75e499c75eade51c20060 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3b49e2e94e6ebb8b23d0955d9e898254455734f8 c8092edb9a11f20f95ccceeb9422b7dd0df337bd git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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6.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0-rc5 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"23392","cve":"CVE-2026-23392","epss":"0.000130000","percentile":"0.023200000","score_date":"2026-04-07","updated_at":"2026-04-08 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the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_tables: release flowtable after rcu grace period on error\n\nCall synchronize_rcu() after unregistering the hooks from error path,\nsince a hook that already refers to this flowtable can be already\nregistered, exposing this flowtable to packet path and nfnetlink_hook\ncontrol plane.\n\nThis error path is rare, it should only happen by reaching the maximum\nnumber hooks or by failing to set up to hardware offload, just call\nsynchronize_rcu().\n\nThere is a check for already used device hooks by different flowtable\nthat could result in EEXIST at this late stage. The hook parser can be\nupdated to perform this check earlier to this error path really becomes\nrarely exercised.\n\nUncovered by KASAN reported as use-after-free from nfnetlink_hook path\nwhen dumping hooks."}],"metrics":[{"cvssV3_1":{"baseScore":7.8,"baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"providerMetadata":{"dateUpdated":"2026-04-02T14:44:32.750Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/d2632de96ccb066e0131ad1494241b9c281c60b8"},{"url":"https://git.kernel.org/stable/c/adee3436ccd29f1e514c028899e400cbc6d84065"},{"url":"https://git.kernel.org/stable/c/7e3955b282eae20d61c75e499c75eade51c20060"},{"url":"https://git.kernel.org/stable/c/c8092edb9a11f20f95ccceeb9422b7dd0df337bd"},{"url":"https://git.kernel.org/stable/c/e78a2dcc7cfb87b64a631441ca7681492b347ef6"},{"url":"https://git.kernel.org/stable/c/d73f4b53aaaea4c95f245e491aa5eeb8a21874ce"}],"title":"netfilter: nf_tables: release flowtable after rcu grace period on error","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-23392","datePublished":"2026-03-25T10:33:16.647Z","dateReserved":"2026-01-13T15:37:46.011Z","dateUpdated":"2026-04-02T14:44:32.750Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-03-25 11:16:39","lastModifiedDate":"2026-04-02 15:16:33","problem_types":[],"metrics":{"cvssMetricV31":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":5.9}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"23392","Ordinal":"1","Title":"netfilter: nf_tables: release flowtable after rcu grace period o","CVE":"CVE-2026-23392","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"23392","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_tables: release flowtable after rcu grace period on error\n\nCall synchronize_rcu() after unregistering the hooks from error path,\nsince a hook that already refers to this flowtable can be already\nregistered, exposing this flowtable to packet path and nfnetlink_hook\ncontrol plane.\n\nThis error path is rare, it should only happen by reaching the maximum\nnumber hooks or by failing to set up to hardware offload, just call\nsynchronize_rcu().\n\nThere is a check for already used device hooks by different flowtable\nthat could result in EEXIST at this late stage. The hook parser can be\nupdated to perform this check earlier to this error path really becomes\nrarely exercised.\n\nUncovered by KASAN reported as use-after-free from nfnetlink_hook path\nwhen dumping hooks.","Type":"Description","Title":"netfilter: nf_tables: release flowtable after rcu grace period o"}]}}}