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CVE-2026-53131

netfilter: require Ethernet MAC header before using eth_hdr() PUBLISHED

Description (CNA)

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)`.

Affected (CNA)

Vendor / productVersions
Linux / Linuxaffected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 4435888e1bf139d2bfe5911643d4217382136743; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 063f43361e884acd7300790e90194430275d0d0c; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 726abf97566867f808fec9d8a408eb9698bd570a; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 367abcacc13a8e2e7624408b7f593bd1e60e49d9; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 5d634afb8b83b49de562792fd0d047416a43bd4d; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before cea435ea7e868ea6fdf039bc4f2090c1d829b556; affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 62443dc21114c0bbc476fa62973db89743f2f137
Linux / Linuxaffected 2.6.12; unaffected 0 before 2.6.12; unaffected 5.15.210 through 5.15.*; unaffected 6.1.176 through 6.1.*; unaffected 6.6.143 through 6.6.*; unaffected 6.12.94 through 6.12.*; unaffected 6.18.36 through 6.18.*; unaffected 7.0.13 through 7.0.*; unaffected 7.1 through *

CWE

No CWE identifiers supplied.

References

ADP enrichment

siemens-SADP

No English description supplied.

CISA-ADP

No English description supplied.

No references supplied.