{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-74701","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-08-15T05:44:03.927Z","datePublished":"2026-08-22T15:33:01.585Z","dateUpdated":"2026-08-22T15:33:01.585Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-22T15:33:01.585Z"},"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."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/openvswitch/flow.c"],"versions":[{"version":"217ac77a3c2524d999730b2a80b61fcc2d0f734a","lessThan":"e85278afd4890dd190ba3c7a1b1a712b801c9fe1","status":"affected","versionType":"git"},{"version":"217ac77a3c2524d999730b2a80b61fcc2d0f734a","lessThan":"81f9b09f0ea3ba9ab966dd17e9f32625a14555e9","status":"affected","versionType":"git"},{"version":"217ac77a3c2524d999730b2a80b61fcc2d0f734a","lessThan":"831471718f6e19aed1a330b03b53190a90e06466","status":"affected","versionType":"git"},{"version":"217ac77a3c2524d999730b2a80b61fcc2d0f734a","lessThan":"d8bea341b183190ce6c055ab0e64ab78eb9a7290","status":"affected","versionType":"git"},{"version":"217ac77a3c2524d999730b2a80b61fcc2d0f734a","lessThan":"0b60b55652ba772b173dddc63f3851e1d2dd5927","status":"affected","versionType":"git"},{"version":"217ac77a3c2524d999730b2a80b61fcc2d0f734a","lessThan":"a8139285c8925efe59af28a9169bb2fda91bff15","status":"affected","versionType":"git"},{"version":"217ac77a3c2524d999730b2a80b61fcc2d0f734a","lessThan":"9b8cfbb58b85bfa7a78fac47fdc77396cd01f699","status":"affected","versionType":"git"},{"version":"217ac77a3c2524d999730b2a80b61fcc2d0f734a","lessThan":"cf6f8b29befb92173659bcef6a441d274947bfae","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/openvswitch/flow.c"],"versions":[{"version":"4.10","status":"affected"},{"version":"0","lessThan":"4.10","status":"unaffected","versionType":"semver"},{"version":"5.10.265","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.216","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.183","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.152","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.104","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.45","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.1.9","lessThanOrEqual":"7.1.*","status":"unaffected","versionType":"semver"},{"version":"7.2","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.10","versionEndExcluding":"5.10.265"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.10","versionEndExcluding":"5.15.216"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.10","versionEndExcluding":"6.1.183"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.10","versionEndExcluding":"6.6.152"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.10","versionEndExcluding":"6.12.104"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.10","versionEndExcluding":"6.18.45"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.10","versionEndExcluding":"7.1.9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.10","versionEndExcluding":"7.2"}]}]}],"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"}}}}