{"api_version":"1","generated_at":"2026-08-22T17:42:14+00:00","cve":"CVE-2026-74701","urls":{"html":"https://cve.report/CVE-2026-74701","api":"https://cve.report/api/cve/CVE-2026-74701.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-74701","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-74701"},"summary":{"title":"net/openvswitch: check Ethernet header length in key_extract()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/openvswitch: check Ethernet header length in key_extract()\n\nWhen a packet arrives on an ARPHRD_NONE device (e.g. TUN),\novs_flow_key_extract() trusts the user-provided skb->protocol field: if\nit is ETH_P_TEB, the packet is classified as MAC_PROTO_ETHERNET and\nkey_extract() is called without ensuring the skb has ETH_HLEN (14) bytes\nof linear data. key_extract() unconditionally pulls 2 * ETH_ALEN bytes\nfor MAC addresses and parse_ethertype() pulls 2 more, either of which\ntriggers a kernel BUG in __skb_pull() when the linear area is too small.\n\n  kernel BUG at include/linux/skbuff.h:2848!\n  RIP: 0010:key_extract+0xa7e/0xd90 net/openvswitch/flow.c:933\n  ovs_flow_key_extract+0x419/0xa70\n  ovs_vport_receive+0x222/0x390\n  netdev_frame_hook+0x3e0/0x630\n  tun_get_user+0x2d0c/0x38e0\n\nFixed by calling check_header() in key_extract() before accessing the\nEthernet header.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-22 16:16:44","updated_at":"2026-08-22 16:16:44"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/cf6f8b29befb92173659bcef6a441d274947bfae","name":"https://git.kernel.org/stable/c/cf6f8b29befb92173659bcef6a441d274947bfae","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d8bea341b183190ce6c055ab0e64ab78eb9a7290","name":"https://git.kernel.org/stable/c/d8bea341b183190ce6c055ab0e64ab78eb9a7290","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9b8cfbb58b85bfa7a78fac47fdc77396cd01f699","name":"https://git.kernel.org/stable/c/9b8cfbb58b85bfa7a78fac47fdc77396cd01f699","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/831471718f6e19aed1a330b03b53190a90e06466","name":"https://git.kernel.org/stable/c/831471718f6e19aed1a330b03b53190a90e06466","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0b60b55652ba772b173dddc63f3851e1d2dd5927","name":"https://git.kernel.org/stable/c/0b60b55652ba772b173dddc63f3851e1d2dd5927","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/81f9b09f0ea3ba9ab966dd17e9f32625a14555e9","name":"https://git.kernel.org/stable/c/81f9b09f0ea3ba9ab966dd17e9f32625a14555e9","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a8139285c8925efe59af28a9169bb2fda91bff15","name":"https://git.kernel.org/stable/c/a8139285c8925efe59af28a9169bb2fda91bff15","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e85278afd4890dd190ba3c7a1b1a712b801c9fe1","name":"https://git.kernel.org/stable/c/e85278afd4890dd190ba3c7a1b1a712b801c9fe1","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74701","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74701","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 217ac77a3c2524d999730b2a80b61fcc2d0f734a e85278afd4890dd190ba3c7a1b1a712b801c9fe1 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 217ac77a3c2524d999730b2a80b61fcc2d0f734a 81f9b09f0ea3ba9ab966dd17e9f32625a14555e9 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 217ac77a3c2524d999730b2a80b61fcc2d0f734a 831471718f6e19aed1a330b03b53190a90e06466 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 217ac77a3c2524d999730b2a80b61fcc2d0f734a d8bea341b183190ce6c055ab0e64ab78eb9a7290 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 217ac77a3c2524d999730b2a80b61fcc2d0f734a 0b60b55652ba772b173dddc63f3851e1d2dd5927 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 217ac77a3c2524d999730b2a80b61fcc2d0f734a a8139285c8925efe59af28a9169bb2fda91bff15 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 217ac77a3c2524d999730b2a80b61fcc2d0f734a 9b8cfbb58b85bfa7a78fac47fdc77396cd01f699 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 217ac77a3c2524d999730b2a80b61fcc2d0f734a cf6f8b29befb92173659bcef6a441d274947bfae git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4.10","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 4.10 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.265 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.216 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.183 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.152 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.104 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.45 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.9 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":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/openvswitch/flow.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"e85278afd4890dd190ba3c7a1b1a712b801c9fe1","status":"affected","version":"217ac77a3c2524d999730b2a80b61fcc2d0f734a","versionType":"git"},{"lessThan":"81f9b09f0ea3ba9ab966dd17e9f32625a14555e9","status":"affected","version":"217ac77a3c2524d999730b2a80b61fcc2d0f734a","versionType":"git"},{"lessThan":"831471718f6e19aed1a330b03b53190a90e06466","status":"affected","version":"217ac77a3c2524d999730b2a80b61fcc2d0f734a","versionType":"git"},{"lessThan":"d8bea341b183190ce6c055ab0e64ab78eb9a7290","status":"affected","version":"217ac77a3c2524d999730b2a80b61fcc2d0f734a","versionType":"git"},{"lessThan":"0b60b55652ba772b173dddc63f3851e1d2dd5927","status":"affected","version":"217ac77a3c2524d999730b2a80b61fcc2d0f734a","versionType":"git"},{"lessThan":"a8139285c8925efe59af28a9169bb2fda91bff15","status":"affected","version":"217ac77a3c2524d999730b2a80b61fcc2d0f734a","versionType":"git"},{"lessThan":"9b8cfbb58b85bfa7a78fac47fdc77396cd01f699","status":"affected","version":"217ac77a3c2524d999730b2a80b61fcc2d0f734a","versionType":"git"},{"lessThan":"cf6f8b29befb92173659bcef6a441d274947bfae","status":"affected","version":"217ac77a3c2524d999730b2a80b61fcc2d0f734a","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/openvswitch/flow.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.10"},{"lessThan":"4.10","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.265","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.216","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.183","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.152","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.104","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.45","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.9","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":"5.10.265","versionStartIncluding":"4.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.216","versionStartIncluding":"4.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.183","versionStartIncluding":"4.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.152","versionStartIncluding":"4.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.104","versionStartIncluding":"4.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.45","versionStartIncluding":"4.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.9","versionStartIncluding":"4.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"4.10","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/openvswitch: check Ethernet header length in key_extract()\n\nWhen a packet arrives on an ARPHRD_NONE device (e.g. TUN),\novs_flow_key_extract() trusts the user-provided skb->protocol field: if\nit is ETH_P_TEB, the packet is classified as MAC_PROTO_ETHERNET and\nkey_extract() is called without ensuring the skb has ETH_HLEN (14) bytes\nof linear data. key_extract() unconditionally pulls 2 * ETH_ALEN bytes\nfor MAC addresses and parse_ethertype() pulls 2 more, either of which\ntriggers a kernel BUG in __skb_pull() when the linear area is too small.\n\n  kernel BUG at include/linux/skbuff.h:2848!\n  RIP: 0010:key_extract+0xa7e/0xd90 net/openvswitch/flow.c:933\n  ovs_flow_key_extract+0x419/0xa70\n  ovs_vport_receive+0x222/0x390\n  netdev_frame_hook+0x3e0/0x630\n  tun_get_user+0x2d0c/0x38e0\n\nFixed by calling check_header() in key_extract() before accessing the\nEthernet header."}],"providerMetadata":{"dateUpdated":"2026-08-22T15:33:01.585Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/e85278afd4890dd190ba3c7a1b1a712b801c9fe1"},{"url":"https://git.kernel.org/stable/c/81f9b09f0ea3ba9ab966dd17e9f32625a14555e9"},{"url":"https://git.kernel.org/stable/c/831471718f6e19aed1a330b03b53190a90e06466"},{"url":"https://git.kernel.org/stable/c/d8bea341b183190ce6c055ab0e64ab78eb9a7290"},{"url":"https://git.kernel.org/stable/c/0b60b55652ba772b173dddc63f3851e1d2dd5927"},{"url":"https://git.kernel.org/stable/c/a8139285c8925efe59af28a9169bb2fda91bff15"},{"url":"https://git.kernel.org/stable/c/9b8cfbb58b85bfa7a78fac47fdc77396cd01f699"},{"url":"https://git.kernel.org/stable/c/cf6f8b29befb92173659bcef6a441d274947bfae"}],"title":"net/openvswitch: check Ethernet header length in key_extract()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-74701","datePublished":"2026-08-22T15:33:01.585Z","dateReserved":"2026-08-15T05:44:03.927Z","dateUpdated":"2026-08-22T15:33:01.585Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-22 16:16:44","lastModifiedDate":"2026-08-22 16:16:44","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"74701","Ordinal":"1","Title":"net/openvswitch: check Ethernet header length in key_extract()","CVE":"CVE-2026-74701","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"74701","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/openvswitch: check Ethernet header length in key_extract()\n\nWhen a packet arrives on an ARPHRD_NONE device (e.g. TUN),\novs_flow_key_extract() trusts the user-provided skb->protocol field: if\nit is ETH_P_TEB, the packet is classified as MAC_PROTO_ETHERNET and\nkey_extract() is called without ensuring the skb has ETH_HLEN (14) bytes\nof linear data. key_extract() unconditionally pulls 2 * ETH_ALEN bytes\nfor MAC addresses and parse_ethertype() pulls 2 more, either of which\ntriggers a kernel BUG in __skb_pull() when the linear area is too small.\n\n  kernel BUG at include/linux/skbuff.h:2848!\n  RIP: 0010:key_extract+0xa7e/0xd90 net/openvswitch/flow.c:933\n  ovs_flow_key_extract+0x419/0xa70\n  ovs_vport_receive+0x222/0x390\n  netdev_frame_hook+0x3e0/0x630\n  tun_get_user+0x2d0c/0x38e0\n\nFixed by calling check_header() in key_extract() before accessing the\nEthernet header.","Type":"Description","Title":"net/openvswitch: check Ethernet header length in key_extract()"}]}}}