{"document":{"category":"csaf_vex","csaf_version":"2.0","title":"CVE-2026-53131: netfilter: require Ethernet MAC header before using eth_hdr()","publisher":{"category":"vendor","name":"HarborGuard Database","namespace":"https://database.harborguard.co"},"tracking":{"id":"CVE-2026-53131","status":"final","version":"1","initial_release_date":"2026-06-25T08:38:20.489Z","current_release_date":"2026-06-28T06:39:24.582Z","revision_history":[{"date":"2026-06-25T08:38:20.489Z","number":"1","summary":"Initial machine-readable export from HarborGuard."}]},"distribution":{"tlp":{"label":"WHITE"},"text":"Public CVE data; freely redistributable."},"notes":[{"category":"description","text":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: require Ethernet MAC header before using eth_hdr()\n\n`ip6t_eui64`, `xt_mac`, the `bitmap:ip,mac`, `hash:ip,mac`, and\n`hash:mac` ipset types, and `nf_log_syslog` access `eth_hdr(skb)`\nafter either assuming that the skb is associated with an Ethernet\ndevice or checking only that the `ETH_HLEN` bytes at\n`skb_mac_header(skb)` lie between `skb->head` and `skb->data`.\n\nMake these paths first verify that the skb is associated with an\nEthernet device, that the MAC header was set, and that it spans at\nleast a full Ethernet header before accessing `eth_hdr(skb)`.","title":"CVE description"}],"references":[{"category":"self","summary":"CVE-2026-53131 on HarborGuard Database","url":"https://database.harborguard.co/cve/CVE-2026-53131"},{"category":"external","summary":"CVE Record","url":"https://www.cve.org/CVERecord?id=CVE-2026-53131"},{"category":"external","summary":"git.kernel.org","url":"https://git.kernel.org/stable/c/4435888e1bf139d2bfe5911643d4217382136743"},{"category":"external","summary":"git.kernel.org","url":"https://git.kernel.org/stable/c/063f43361e884acd7300790e90194430275d0d0c"},{"category":"external","summary":"git.kernel.org","url":"https://git.kernel.org/stable/c/726abf97566867f808fec9d8a408eb9698bd570a"},{"category":"external","summary":"git.kernel.org","url":"https://git.kernel.org/stable/c/367abcacc13a8e2e7624408b7f593bd1e60e49d9"},{"category":"external","summary":"git.kernel.org","url":"https://git.kernel.org/stable/c/5d634afb8b83b49de562792fd0d047416a43bd4d"},{"category":"external","summary":"git.kernel.org","url":"https://git.kernel.org/stable/c/cea435ea7e868ea6fdf039bc4f2090c1d829b556"},{"category":"external","summary":"git.kernel.org","url":"https://git.kernel.org/stable/c/62443dc21114c0bbc476fa62973db89743f2f137"}]},"product_tree":{"branches":[{"category":"vendor","name":"Linux","branches":[{"category":"product_name","name":"Linux","branches":[{"category":"product_version_range","name":">=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4435888e1bf139d2bfe5911643d4217382136743","product":{"name":"Linux Linux >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4435888e1bf139d2bfe5911643d4217382136743","product_id":"CSAFPID-1","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:*"}}},{"category":"product_version_range","name":">=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <063f43361e884acd7300790e90194430275d0d0c","product":{"name":"Linux Linux >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <063f43361e884acd7300790e90194430275d0d0c","product_id":"CSAFPID-2","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:*"}}},{"category":"product_version_range","name":">=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <726abf97566867f808fec9d8a408eb9698bd570a","product":{"name":"Linux Linux >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <726abf97566867f808fec9d8a408eb9698bd570a","product_id":"CSAFPID-3","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:*"}}},{"category":"product_version_range","name":">=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <367abcacc13a8e2e7624408b7f593bd1e60e49d9","product":{"name":"Linux Linux >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <367abcacc13a8e2e7624408b7f593bd1e60e49d9","product_id":"CSAFPID-4","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:*"}}},{"category":"product_version_range","name":">=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5d634afb8b83b49de562792fd0d047416a43bd4d","product":{"name":"Linux Linux >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5d634afb8b83b49de562792fd0d047416a43bd4d","product_id":"CSAFPID-5","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:*"}}},{"category":"product_version_range","name":">=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <cea435ea7e868ea6fdf039bc4f2090c1d829b556","product":{"name":"Linux Linux >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <cea435ea7e868ea6fdf039bc4f2090c1d829b556","product_id":"CSAFPID-6","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:*"}}},{"category":"product_version_range","name":">=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <62443dc21114c0bbc476fa62973db89743f2f137","product":{"name":"Linux Linux >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <62443dc21114c0bbc476fa62973db89743f2f137","product_id":"CSAFPID-7","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:*"}}},{"category":"product_version_range","name":"<5.15.210","product":{"name":"Linux Linux <5.15.210","product_id":"CSAFPID-8","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:*"}}},{"category":"product_version_range","name":"<6.1.176","product":{"name":"Linux Linux <6.1.176","product_id":"CSAFPID-9","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:*"}}},{"category":"product_version_range","name":"<6.6.143","product":{"name":"Linux Linux <6.6.143","product_id":"CSAFPID-10","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:*"}}},{"category":"product_version_range","name":"<6.12.94","product":{"name":"Linux Linux <6.12.94","product_id":"CSAFPID-11","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:*"}}},{"category":"product_version_range","name":"<6.18.36","product":{"name":"Linux Linux <6.18.36","product_id":"CSAFPID-12","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:*"}}},{"category":"product_version_range","name":"<7.0.13","product":{"name":"Linux Linux <7.0.13","product_id":"CSAFPID-13","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:*"}}}]}]},{"category":"vendor","name":"Linux","branches":[{"category":"product_name","name":"Linux","branches":[{"category":"product_version","name":"*","product":{"name":"Linux Linux *","product_id":"CSAFPID-14","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:*"}}},{"category":"product_version","name":"5.15.210","product":{"name":"Linux Linux 5.15.210","product_id":"CSAFPID-15","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:*"}}},{"category":"product_version","name":"6.1.176","product":{"name":"Linux Linux 6.1.176","product_id":"CSAFPID-16","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:*"}}},{"category":"product_version","name":"6.6.143","product":{"name":"Linux Linux 6.6.143","product_id":"CSAFPID-17","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:*"}}},{"category":"product_version","name":"6.12.94","product":{"name":"Linux Linux 6.12.94","product_id":"CSAFPID-18","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:*"}}},{"category":"product_version","name":"6.18.36","product":{"name":"Linux Linux 6.18.36","product_id":"CSAFPID-19","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:*"}}},{"category":"product_version","name":"7.0.13","product":{"name":"Linux Linux 7.0.13","product_id":"CSAFPID-20","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:*"}}},{"category":"product_version","name":"7.1","product":{"name":"Linux Linux 7.1","product_id":"CSAFPID-21","product_identification_helper":{"cpe":"cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:*"}}}]}]}]},"vulnerabilities":[{"cve":"CVE-2026-53131","title":"netfilter: require Ethernet MAC header before using eth_hdr()","notes":[{"category":"description","text":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: require Ethernet MAC header before using eth_hdr()\n\n`ip6t_eui64`, `xt_mac`, the `bitmap:ip,mac`, `hash:ip,mac`, and\n`hash:mac` ipset types, and `nf_log_syslog` access `eth_hdr(skb)`\nafter either assuming that the skb is associated with an Ethernet\ndevice or checking only that the `ETH_HLEN` bytes at\n`skb_mac_header(skb)` lie between `skb->head` and `skb->data`.\n\nMake these paths first verify that the skb is associated with an\nEthernet device, that the MAC header was set, and that it spans at\nleast a full Ethernet header before accessing `eth_hdr(skb)`.","title":"CVE description"}],"product_status":{"known_affected":["CSAFPID-1","CSAFPID-2","CSAFPID-3","CSAFPID-4","CSAFPID-5","CSAFPID-6","CSAFPID-7","CSAFPID-8","CSAFPID-9","CSAFPID-10","CSAFPID-11","CSAFPID-12","CSAFPID-13","CSAFPID-14"],"fixed":["CSAFPID-15","CSAFPID-16","CSAFPID-17","CSAFPID-18","CSAFPID-19","CSAFPID-20","CSAFPID-21"]},"scores":[{"cvss_v3":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H","baseScore":9.4,"baseSeverity":"CRITICAL"},"products":["CSAFPID-1","CSAFPID-2","CSAFPID-3","CSAFPID-4","CSAFPID-5","CSAFPID-6","CSAFPID-7","CSAFPID-8","CSAFPID-9","CSAFPID-10","CSAFPID-11","CSAFPID-12","CSAFPID-13","CSAFPID-14"]}],"remediations":[{"category":"vendor_fix","details":"Update to a fixed version: 063f43361e884acd7300790e90194430275d0d0c, 367abcacc13a8e2e7624408b7f593bd1e60e49d9, 4435888e1bf139d2bfe5911643d4217382136743, 5.15.210, 5d634afb8b83b49de562792fd0d047416a43bd4d, 6.1.176, 6.6.143, 6.12.94, 6.18.36, 62443dc21114c0bbc476fa62973db89743f2f137, 7.0.13, 7.1, 726abf97566867f808fec9d8a408eb9698bd570a, cea435ea7e868ea6fdf039bc4f2090c1d829b556.","product_ids":["CSAFPID-1","CSAFPID-2","CSAFPID-3","CSAFPID-4","CSAFPID-5","CSAFPID-6","CSAFPID-7","CSAFPID-8","CSAFPID-9","CSAFPID-10","CSAFPID-11","CSAFPID-12","CSAFPID-13","CSAFPID-14"]}]}]}