by Kastro CVE-2026-53131
Linux Linux — netfilter: require Ethernet MAC header before using eth_hdr()
Description · from the CVE record
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
ProductAffectedFixed inSource
Linux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 4435888e1bf139d2bfe5911643d42173821367434435888e1bf139d2bfe5911643d4217382136743CNA
Linux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 063f43361e884acd7300790e90194430275d0d0c063f43361e884acd7300790e90194430275d0d0cCNA
Linux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 726abf97566867f808fec9d8a408eb9698bd570a726abf97566867f808fec9d8a408eb9698bd570aCNA
Linux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 367abcacc13a8e2e7624408b7f593bd1e60e49d9367abcacc13a8e2e7624408b7f593bd1e60e49d9CNA
Linux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 5d634afb8b83b49de562792fd0d047416a43bd4d5d634afb8b83b49de562792fd0d047416a43bd4dCNA
Linux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < cea435ea7e868ea6fdf039bc4f2090c1d829b556cea435ea7e868ea6fdf039bc4f2090c1d829b556CNA
Linux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 62443dc21114c0bbc476fa62973db89743f2f13762443dc21114c0bbc476fa62973db89743f2f137CNA
Linux2.6.12–CNA
SIMATIC S7-1500 TM MFP - GNU/Linux subsystemall versions–siemens-SADP
Scores by source
Linux (CNA)9.4CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: partial