Answer in brief
CVE-2026-53131 records a Critical severity (CVSS 9.4) vulnerability in netfilter: require Ethernet MAC header before using eth_hdr(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
Answer in brief
CVE-2026-53131 records a Critical severity (CVSS 9.4) vulnerability in netfilter: require Ethernet MAC header before using eth_hdr(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 9.4. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4435888e1bf139d2bfe5911643d4217382136743 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <063f43361e884acd7300790e90194430275d0d0c || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <726abf97566867f808fec9d8a408eb9698bd570a || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <367abcacc13a8e2e7624408b7f593bd1e60e49d9 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5d634afb8b83b49de562792fd0d047416a43bd4d || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <cea435ea7e868ea6fdf039bc4f2090c1d829b556 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <62443dc21114c0bbc476fa62973db89743f2f137 | 4435888e1bf139d2bfe5911643d4217382136743, 063f43361e884acd7300790e90194430275d0d0c, 726abf97566867f808fec9d8a408eb9698bd570a, 367abcacc13a8e2e7624408b7f593bd1e60e49d9, 5d634afb8b83b49de562792fd0d047416a43bd4d, cea435ea7e868ea6fdf039bc4f2090c1d829b556, 62443dc21114c0bbc476fa62973db89743f2f137 |
| Linux/Linuxgeneric | 2.6.12 | Not reported |
Published upstream
Jun 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 25, 2026
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)`.
Quoted source text, attributed separately from HOL analysis.
CVSS is 9.4. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4435888e1bf139d2bfe5911643d4217382136743 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <063f43361e884acd7300790e90194430275d0d0c || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <726abf97566867f808fec9d8a408eb9698bd570a || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <367abcacc13a8e2e7624408b7f593bd1e60e49d9 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <5d634afb8b83b49de562792fd0d047416a43bd4d || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <cea435ea7e868ea6fdf039bc4f2090c1d829b556 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <62443dc21114c0bbc476fa62973db89743f2f137 | 4435888e1bf139d2bfe5911643d4217382136743, 063f43361e884acd7300790e90194430275d0d0c, 726abf97566867f808fec9d8a408eb9698bd570a, 367abcacc13a8e2e7624408b7f593bd1e60e49d9, 5d634afb8b83b49de562792fd0d047416a43bd4d, cea435ea7e868ea6fdf039bc4f2090c1d829b556, 62443dc21114c0bbc476fa62973db89743f2f137 |
| Linux/Linuxgeneric | 2.6.12 | Not reported |
Published upstream
Jun 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 25, 2026
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)`.
Quoted source text, attributed separately from HOL analysis.