{"api_version":"1","generated_at":"2026-07-28T12:20:24+00:00","cve":"CVE-2026-64414","urls":{"html":"https://cve.report/CVE-2026-64414","api":"https://cve.report/api/cve/CVE-2026-64414.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-64414","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-64414"},"summary":{"title":"netfilter: handle unreadable frags","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: handle unreadable frags\n\nsashiko reports:\n When an skb with unreadable fragments (such as from devmem TCP, where\n skb_frags_readable(skb) returns false) is processed by the u32 module,\n skb_copy_bits() will safely return a negative error code [..]\n\nxt_u32: bail out with hotdrop in this case.\ngather_frags: return -1, just as if we had no fragment header.\nnfnetlink_queue: restrict to the linear part.\nnfnetlink_log: restrict to the linear part.\n\nv2:\n - skb_zerocopy helpers don't copy readable flag, i.e. nfnetlink_queue\n is broken too\n xt_u32 shouldn't return true if hotdrop was set.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-07-25 10:17:25","updated_at":"2026-07-27 05:16:48"},"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/fc5bfe63bacf8a3ae307b62b34206406ca733354","name":"https://git.kernel.org/stable/c/fc5bfe63bacf8a3ae307b62b34206406ca733354","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/3b13e7635795394705920cca1e1db7e4ca2e334b","name":"https://git.kernel.org/stable/c/3b13e7635795394705920cca1e1db7e4ca2e334b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/57056be3ec12e7d9ecd20a60d4060f510e4f284c","name":"https://git.kernel.org/stable/c/57056be3ec12e7d9ecd20a60d4060f510e4f284c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/da5b58478a9c1b85608c9e40a3b8432d071b409e","name":"https://git.kernel.org/stable/c/da5b58478a9c1b85608c9e40a3b8432d071b409e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-64414","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64414","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 65249feb6b3df9e17bab5911ee56fa7b0971e231 3b13e7635795394705920cca1e1db7e4ca2e334b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 65249feb6b3df9e17bab5911ee56fa7b0971e231 fc5bfe63bacf8a3ae307b62b34206406ca733354 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 65249feb6b3df9e17bab5911ee56fa7b0971e231 57056be3ec12e7d9ecd20a60d4060f510e4f284c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 65249feb6b3df9e17bab5911ee56fa7b0971e231 da5b58478a9c1b85608c9e40a3b8432d071b409e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: handle unreadable frags\n\nsashiko reports:\n When an skb with unreadable fragments (such as from devmem TCP, where\n skb_frags_readable(skb) returns false) is processed by the u32 module,\n skb_copy_bits() will safely return a negative error code [..]\n\nxt_u32: bail out with hotdrop in this case.\ngather_frags: return -1, just as if we had no fragment header.\nnfnetlink_queue: restrict to the linear part.\nnfnetlink_log: restrict to the linear part.\n\nv2:\n - skb_zerocopy helpers don't copy readable flag, i.e. nfnetlink_queue\n is broken too\n xt_u32 shouldn't return true if hotdrop was set."}],"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":"2026-07-27T05:00:45.364Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/3b13e7635795394705920cca1e1db7e4ca2e334b"},{"url":"https://git.kernel.org/stable/c/fc5bfe63bacf8a3ae307b62b34206406ca733354"},{"url":"https://git.kernel.org/stable/c/57056be3ec12e7d9ecd20a60d4060f510e4f284c"},{"url":"https://git.kernel.org/stable/c/da5b58478a9c1b85608c9e40a3b8432d071b409e"}],"title":"netfilter: handle unreadable frags","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-64414","datePublished":"2026-07-25T08:50:54.495Z","dateReserved":"2026-07-19T15:36:31.786Z","dateUpdated":"2026-07-27T05:00:45.364Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-07-25 10:17:25","lastModifiedDate":"2026-07-27 05:16:48","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":"64414","Ordinal":"1","Title":"netfilter: handle unreadable frags","CVE":"CVE-2026-64414","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"64414","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: handle unreadable frags\n\nsashiko reports:\n When an skb with unreadable fragments (such as from devmem TCP, where\n skb_frags_readable(skb) returns false) is processed by the u32 module,\n skb_copy_bits() will safely return a negative error code [..]\n\nxt_u32: bail out with hotdrop in this case.\ngather_frags: return -1, just as if we had no fragment header.\nnfnetlink_queue: restrict to the linear part.\nnfnetlink_log: restrict to the linear part.\n\nv2:\n - skb_zerocopy helpers don't copy readable flag, i.e. nfnetlink_queue\n is broken too\n xt_u32 shouldn't return true if hotdrop was set.","Type":"Description","Title":"netfilter: handle unreadable frags"}]}}}