{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-53131", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-06-09T07:44:35.386Z", "datePublished": "2026-06-25T08:38:20.489Z", "dateUpdated": "2026-08-05T12:33:25.251Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:33:25.251Z" }, "descriptions": [ { "lang": "en", "value": "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)`." } ], "metrics": [ { "cvssV3_1": { "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" }, "scenarios": [ { "lang": "en", "value": "AV:N - The vulnerable netfilter match, ipset, and logging paths run while processing packets in receive/netdev hooks. In a reasonable firewall, router, VPN, or tunnel deployment with these rules installed, unauthenticated remote packets can reach the vulnerable code.\nAC:L - No race or difficult timing is required; a packet reaching a vulnerable rule with an invalid, unset, non-Ethernet, or too-short MAC header deterministically drives the bad eth_hdr(skb) access. The needed rule/interface setup is a plausible deployment condition, not an exploit race.\nPR:N - The remote packet sender does not need credentials or local privileges once the affected rule or logger is configured. Although rule installation requires CAP_NET_ADMIN, that is not required for the runtime remote-trigger scenario.\nUI:N - Exploitation is triggered by packet processing and does not require a victim user to open a file, mount anything, or perform another action.\nS:U - The impact remains within the kernel/network stack security authority. There is no VM, IOMMU, or separate sandbox boundary crossing.\nC:H - The flaw causes invalid or out-of-bounds reads from the skb MAC header, and those bytes can be copied into logs/ipset state or influence observable match behavior. Per the required guidance, out-of-bounds reads are scored High when not proven strictly harmless.\nI:L - The primitive is a read rather than an arbitrary write or control-flow hijack. However, the wrongly read MAC bytes can influence firewall matches and ipset add/delete/test behavior, giving limited integrity impact.\nA:H - Invalid eth_hdr(skb) access can produce slab out-of-bounds/KASAN reports or kernel oops/panic conditions, and packets can be sent repeatedly. Kernel crashes are High availability impact." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/ipv6/netfilter/ip6t_eui64.c", "net/netfilter/ipset/ip_set_bitmap_ipmac.c", "net/netfilter/ipset/ip_set_hash_ipmac.c", "net/netfilter/ipset/ip_set_hash_mac.c", "net/netfilter/nf_log_syslog.c", "net/netfilter/xt_mac.c" ], "versions": [ { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "4435888e1bf139d2bfe5911643d4217382136743", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "063f43361e884acd7300790e90194430275d0d0c", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "726abf97566867f808fec9d8a408eb9698bd570a", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "367abcacc13a8e2e7624408b7f593bd1e60e49d9", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "5d634afb8b83b49de562792fd0d047416a43bd4d", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "cea435ea7e868ea6fdf039bc4f2090c1d829b556", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "62443dc21114c0bbc476fa62973db89743f2f137", "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/ipv6/netfilter/ip6t_eui64.c", "net/netfilter/ipset/ip_set_bitmap_ipmac.c", "net/netfilter/ipset/ip_set_hash_ipmac.c", "net/netfilter/ipset/ip_set_hash_mac.c", "net/netfilter/nf_log_syslog.c", "net/netfilter/xt_mac.c" ], "versions": [ { "version": "2.6.12", "status": "affected" }, { "version": "0", "lessThan": "2.6.12", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.210", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.176", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.143", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.94", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.36", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.0.13", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1", "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": "2.6.12", "versionEndExcluding": "5.15.210" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.1.176" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.6.143" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.12.94" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.18.36" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "7.0.13" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "7.1" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/4435888e1bf139d2bfe5911643d4217382136743" }, { "url": "https://git.kernel.org/stable/c/063f43361e884acd7300790e90194430275d0d0c" }, { "url": "https://git.kernel.org/stable/c/726abf97566867f808fec9d8a408eb9698bd570a" }, { "url": "https://git.kernel.org/stable/c/367abcacc13a8e2e7624408b7f593bd1e60e49d9" }, { "url": "https://git.kernel.org/stable/c/5d634afb8b83b49de562792fd0d047416a43bd4d" }, { "url": "https://git.kernel.org/stable/c/cea435ea7e868ea6fdf039bc4f2090c1d829b556" }, { "url": "https://git.kernel.org/stable/c/62443dc21114c0bbc476fa62973db89743f2f137" } ], "title": "netfilter: require Ethernet MAC header before using eth_hdr()", "x_generator": { "engine": "bippy-1.2.0" } } } }