CVE-2026-53131: netfilter: require Ethernet MAC header before using eth_hdr()
Vulnerability summary
CVE-2026-53131 is a critical (CVSS 9.4) Out-of-bounds Read vulnerability in linux. EPSS estimates a 0.43% chance of exploitation in the next 30 days, higher than 37.8% of scored vulnerabilities.
Severe, CVSS 9.4 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 0% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 176 · Related 172Showing 100 of 177.
Timeline
- 25-06-2026PublishedVulnerability first disclosed.
- 19-10-2026Last modifiedVulnerability information updated.
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 metrics
6 scores · 5 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated9.4CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H
- OSV · DebianEcosystem advisory · calculated9.4CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H
- OSV · ChainguardEcosystem advisory · calculated9.4CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H
- NVDNIST9.4CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H
EPSS trend
Probability
0.43%
Chance of exploitation in the next 30 days
Percentile
38%
Versus all other CVEs
30-day change
Increase +0.01 pp
From 0.43% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu168 products
- linuxAll versions (No fix recorded) | < 3.13.0-218.269 | < 4.4.0-288.322 | < 4.15.0-260.272 | < 5.4.0-241.261 | < 5.15.0-191.201 | < 6.8.0-142.142 | < 7.0.0-29.29
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws< 4.4.0-1159.165 | < 4.4.0-1197.212 | < 4.15.0-1197.210 | < 5.4.0-1164.175 | < 5.15.0-1115.122 | < 6.8.0-1065.68 | All versions (No fix recorded) | < 7.0.0-1010.10
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Chainguard11 products
- linux-aws-6.12< 6.12.95-r0
- linux-aws-6.18< 6.18.38-r0
- linux-azure-6.18< 6.18.38-r0
- linux-gcp-6.18< 6.18.38-r0
- linux-gcp-6.18-bootc-boot-installed< 6.18.38-r0
Linux2 products
- linux≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 4435888e1bf139d2bfe5911643d4217382136743 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 063f43361e884acd7300790e90194430275d0d0c | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 726abf97566867f808fec9d8a408eb9698bd570a | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 367abcacc13a8e2e7624408b7f593bd1e60e49d9 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 5d634afb8b83b49de562792fd0d047416a43bd4d | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < cea435ea7e868ea6fdf039bc4f2090c1d829b556 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 62443dc21114c0bbc476fa62973db89743f2f137 | 2.6.12
- linux_kernel≥ 2.6.12.1, < 5.15.210 | ≥ 5.16, < 6.1.176 | ≥ 6.2, < 6.6.143 | ≥ 6.7, < 6.12.94 | ≥ 6.13, < 6.18.36 | ≥ 6.19, < 7.0.13 | 2.6.12 | 2.6.12:rc2 | 2.6.12:rc3 | 2.6.12:rc4 | 2.6.12:rc5
Debian1 product
- linux< 6.1.176-1 | < 6.12.94-1 | < 7.0.13-1
4 vendors · 182 products
