{"api_version":"1","generated_at":"2026-09-13T06:11:19+00:00","cve":"CVE-2026-80906","urls":{"html":"https://cve.report/CVE-2026-80906","api":"https://cve.report/api/cve/CVE-2026-80906.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-80906","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-80906"},"summary":{"title":"net: packet: fix wrong transport_header when sending VLAN-tagged frame","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: packet: fix wrong transport_header when sending VLAN-tagged frame\n\nIn packet_parse_headers(), when processing a VLAN-tagged frame,\nskb_set_network_header() is called to advance network_header past the\nVLAN tag to the inner protocol header. skb_probe_transport_header() is\nthen called with skb->protocol still set to the outer VLAN EtherType\n(e.g. ETH_P_8021Q), while nhoff (derived from skb_network_offset())\nalready points past the VLAN tag to the inner protocol header.\n\nIn __skb_flow_dissect(), proto is initialized to ETH_P_8021Q and nhoff\npoints past the VLAN tag. When the dissector hits case ETH_P_8021Q, it\nreads a struct vlan_hdr at nhoff via __skb_header_pointer(), but that\noffset contains the inner protocol header (e.g. an IP header). The bytes\nare misinterpreted as a VLAN header, yielding a garbage encapsulated\nEtherType that matches no known protocol. The dissector returns false,\nso skb_probe_transport_header() never calls skb_set_transport_header(),\nleaving transport_header at its uninitialized sentinel value (~0U).\n\nMove skb_probe_transport_header() to before skb_set_network_header(). At\nthe time skb_probe_transport_header() is called, network_header still\npoints to the VLAN header, so nhoff correctly points to the VLAN header.\nThe flow dissector can then parse the VLAN header, extract the inner\nEtherType, and advance nhoff to the inner protocol header, allowing\ntransport_header to be set correctly.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-04 18:18:00","updated_at":"2026-09-04 18:18:00"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/5479eb9b355f44745d7ccfe112386bd4f96eceea","name":"https://git.kernel.org/stable/c/5479eb9b355f44745d7ccfe112386bd4f96eceea","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/fa86bc52ea8ba981f74f851fd61e2a3d3bc0feac","name":"https://git.kernel.org/stable/c/fa86bc52ea8ba981f74f851fd61e2a3d3bc0feac","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6386a6ffa2efba2965ed8e4fa303582c0b76a215","name":"https://git.kernel.org/stable/c/6386a6ffa2efba2965ed8e4fa303582c0b76a215","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/6971cf319263d6a1b4096f9248aca9e57d77a1eb","name":"https://git.kernel.org/stable/c/6971cf319263d6a1b4096f9248aca9e57d77a1eb","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/f9297abbcaba760b7a7b9d63b839f607f738013e","name":"https://git.kernel.org/stable/c/f9297abbcaba760b7a7b9d63b839f607f738013e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/01fdecc0480d916c799dbee584833a4a37e94d06","name":"https://git.kernel.org/stable/c/01fdecc0480d916c799dbee584833a4a37e94d06","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a4b82de96d465ddb44bc931145c0fa80c4fe9c9c","name":"https://git.kernel.org/stable/c/a4b82de96d465ddb44bc931145c0fa80c4fe9c9c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e451e20adb869a983a21dda158625f024142e61f","name":"https://git.kernel.org/stable/c/e451e20adb869a983a21dda158625f024142e61f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80906","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80906","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c2137d565ceb505de69593c181a0543bc4083838 a4b82de96d465ddb44bc931145c0fa80c4fe9c9c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9ff46c36df2e0a1ac352f2f4038eaf3f0f7361b8 fa86bc52ea8ba981f74f851fd61e2a3d3bc0feac git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected dfed913e8b55a0c2c4906f1242fd38fd9a116e49 5479eb9b355f44745d7ccfe112386bd4f96eceea git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected dfed913e8b55a0c2c4906f1242fd38fd9a116e49 e451e20adb869a983a21dda158625f024142e61f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.4.229 5.5 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.19","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.19 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.266 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.217 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.184 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.153 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.105 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.46 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.10 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"80906","cve":"CVE-2026-80906","epss":"0.001650000","percentile":"0.059530000","score_date":"2026-09-07","updated_at":"2026-09-08 00:05:26"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/packet/af_packet.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"a4b82de96d465ddb44bc931145c0fa80c4fe9c9c","status":"affected","version":"c2137d565ceb505de69593c181a0543bc4083838","versionType":"git"},{"lessThan":"fa86bc52ea8ba981f74f851fd61e2a3d3bc0feac","status":"affected","version":"9ff46c36df2e0a1ac352f2f4038eaf3f0f7361b8","versionType":"git"},{"lessThan":"5479eb9b355f44745d7ccfe112386bd4f96eceea","status":"affected","version":"dfed913e8b55a0c2c4906f1242fd38fd9a116e49","versionType":"git"},{"lessThan":"e451e20adb869a983a21dda158625f024142e61f","status":"affected","version":"dfed913e8b55a0c2c4906f1242fd38fd9a116e49","versionType":"git"},{"lessThan":"6971cf319263d6a1b4096f9248aca9e57d77a1eb","status":"affected","version":"dfed913e8b55a0c2c4906f1242fd38fd9a116e49","versionType":"git"},{"lessThan":"f9297abbcaba760b7a7b9d63b839f607f738013e","status":"affected","version":"dfed913e8b55a0c2c4906f1242fd38fd9a116e49","versionType":"git"},{"lessThan":"6386a6ffa2efba2965ed8e4fa303582c0b76a215","status":"affected","version":"dfed913e8b55a0c2c4906f1242fd38fd9a116e49","versionType":"git"},{"lessThan":"01fdecc0480d916c799dbee584833a4a37e94d06","status":"affected","version":"dfed913e8b55a0c2c4906f1242fd38fd9a116e49","versionType":"git"},{"status":"affected","version":"ad3f90a9c4a2c74bb3711f2031bffda4ec44c849","versionType":"git"},{"lessThan":"5.10.266","status":"affected","version":"5.10.163","versionType":"semver"},{"lessThan":"5.15.217","status":"affected","version":"5.15.87","versionType":"semver"},{"lessThan":"5.5","status":"affected","version":"5.4.229","versionType":"semver"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/packet/af_packet.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.19"},{"lessThan":"5.19","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.266","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.217","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.184","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.153","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.105","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.46","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.10","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.266","versionStartIncluding":"5.10.163","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.217","versionStartIncluding":"5.15.87","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.184","versionStartIncluding":"5.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.153","versionStartIncluding":"5.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.105","versionStartIncluding":"5.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.46","versionStartIncluding":"5.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.10","versionStartIncluding":"5.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"5.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4.229","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: packet: fix wrong transport_header when sending VLAN-tagged frame\n\nIn packet_parse_headers(), when processing a VLAN-tagged frame,\nskb_set_network_header() is called to advance network_header past the\nVLAN tag to the inner protocol header. skb_probe_transport_header() is\nthen called with skb->protocol still set to the outer VLAN EtherType\n(e.g. ETH_P_8021Q), while nhoff (derived from skb_network_offset())\nalready points past the VLAN tag to the inner protocol header.\n\nIn __skb_flow_dissect(), proto is initialized to ETH_P_8021Q and nhoff\npoints past the VLAN tag. When the dissector hits case ETH_P_8021Q, it\nreads a struct vlan_hdr at nhoff via __skb_header_pointer(), but that\noffset contains the inner protocol header (e.g. an IP header). The bytes\nare misinterpreted as a VLAN header, yielding a garbage encapsulated\nEtherType that matches no known protocol. The dissector returns false,\nso skb_probe_transport_header() never calls skb_set_transport_header(),\nleaving transport_header at its uninitialized sentinel value (~0U).\n\nMove skb_probe_transport_header() to before skb_set_network_header(). At\nthe time skb_probe_transport_header() is called, network_header still\npoints to the VLAN header, so nhoff correctly points to the VLAN header.\nThe flow dissector can then parse the VLAN header, extract the inner\nEtherType, and advance nhoff to the inner protocol header, allowing\ntransport_header to be set correctly."}],"providerMetadata":{"dateUpdated":"2026-09-04T17:19:16.531Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/a4b82de96d465ddb44bc931145c0fa80c4fe9c9c"},{"url":"https://git.kernel.org/stable/c/fa86bc52ea8ba981f74f851fd61e2a3d3bc0feac"},{"url":"https://git.kernel.org/stable/c/5479eb9b355f44745d7ccfe112386bd4f96eceea"},{"url":"https://git.kernel.org/stable/c/e451e20adb869a983a21dda158625f024142e61f"},{"url":"https://git.kernel.org/stable/c/6971cf319263d6a1b4096f9248aca9e57d77a1eb"},{"url":"https://git.kernel.org/stable/c/f9297abbcaba760b7a7b9d63b839f607f738013e"},{"url":"https://git.kernel.org/stable/c/6386a6ffa2efba2965ed8e4fa303582c0b76a215"},{"url":"https://git.kernel.org/stable/c/01fdecc0480d916c799dbee584833a4a37e94d06"}],"title":"net: packet: fix wrong transport_header when sending VLAN-tagged frame","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-80906","datePublished":"2026-09-04T17:19:16.531Z","dateReserved":"2026-08-26T14:34:25.800Z","dateUpdated":"2026-09-04T17:19:16.531Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-04 18:18:00","lastModifiedDate":"2026-09-04 18:18:00","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"80906","Ordinal":"1","Title":"net: packet: fix wrong transport_header when sending VLAN-tagged","CVE":"CVE-2026-80906","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"80906","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: packet: fix wrong transport_header when sending VLAN-tagged frame\n\nIn packet_parse_headers(), when processing a VLAN-tagged frame,\nskb_set_network_header() is called to advance network_header past the\nVLAN tag to the inner protocol header. skb_probe_transport_header() is\nthen called with skb->protocol still set to the outer VLAN EtherType\n(e.g. ETH_P_8021Q), while nhoff (derived from skb_network_offset())\nalready points past the VLAN tag to the inner protocol header.\n\nIn __skb_flow_dissect(), proto is initialized to ETH_P_8021Q and nhoff\npoints past the VLAN tag. When the dissector hits case ETH_P_8021Q, it\nreads a struct vlan_hdr at nhoff via __skb_header_pointer(), but that\noffset contains the inner protocol header (e.g. an IP header). The bytes\nare misinterpreted as a VLAN header, yielding a garbage encapsulated\nEtherType that matches no known protocol. The dissector returns false,\nso skb_probe_transport_header() never calls skb_set_transport_header(),\nleaving transport_header at its uninitialized sentinel value (~0U).\n\nMove skb_probe_transport_header() to before skb_set_network_header(). At\nthe time skb_probe_transport_header() is called, network_header still\npoints to the VLAN header, so nhoff correctly points to the VLAN header.\nThe flow dissector can then parse the VLAN header, extract the inner\nEtherType, and advance nhoff to the inner protocol header, allowing\ntransport_header to be set correctly.","Type":"Description","Title":"net: packet: fix wrong transport_header when sending VLAN-tagged"}]}}}