CVE-2026-53131
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: require Ethernet MAC header before using eth_hdr() `ip6t_eui64`, `xt_mac`, the `bitmap:ip,mac`, `hash:ip,mac`, and `hash:mac` ipset types, and `nf_log_syslog` access `eth_hdr(skb)` after either assuming that the skb is associated with an Ethernet device or checking only that the `ETH_HLEN` bytes at `skb_mac_header(skb)` lie between `skb->head` and `skb->data`. Make these paths first verify that the skb is associated with an Ethernet device, that the MAC header was set, and that it spans at least a full Ethernet header before accessing `eth_hdr(skb)`.
Severity
CRITICAL
CVSS score
9.4
(v3.1)
Vulnerability status
Modified
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-06-25 09:16:30.307000
Last modified
2026-10-19 20:19:04.780000
View original CVE JSON
{
"id": "CVE-2026-53131",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-06-25T09:16:30.307",
"lastModified": "2026-10-19T20:19:04.780",
"vulnStatus": "Modified",
"cveTags": [],
"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)`."
}
],
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"net/netfilter/ipset/ip_set_bitmap_ipmac.c",
"net/netfilter/ipset/ip_set_hash_ipmac.c",
"net/netfilter/ipset/ip_set_hash_mac.c",
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"baseScore": 9.4,
"baseSeverity": "CRITICAL",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "HIGH",
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"id": "CVE-2026-53131",
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