CVE-2026-53131
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.43%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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)`.
- CVSS 3.1
- 9.4 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H
- EPSS
- 0.43% probability · 36th percentile
- CISA KEV
- Not listed
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/063f43361e884acd7300790e90194430275d0d0cPatch
- https://git.kernel.org/stable/c/367abcacc13a8e2e7624408b7f593bd1e60e49d9Patch
- https://git.kernel.org/stable/c/4435888e1bf139d2bfe5911643d4217382136743Patch
- https://git.kernel.org/stable/c/5d634afb8b83b49de562792fd0d047416a43bd4dPatch
- https://git.kernel.org/stable/c/62443dc21114c0bbc476fa62973db89743f2f137Patch
- https://git.kernel.org/stable/c/726abf97566867f808fec9d8a408eb9698bd570aPatch
- https://git.kernel.org/stable/c/cea435ea7e868ea6fdf039bc4f2090c1d829b556Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.