Vulnerability · Published Jun 25, 2026 · Assigned by Linux

CVE-2026-53131netfilter: require Ethernet MAC header before using eth_hdr()

Critical 9.4

In plain English

A critical-severity out-of-bounds read in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 38% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)9.4Critical
Exploit odds (30 days)0.4%top 62.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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)`.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8bpftool4.18.0-553.164.1.el8_10ALSA-2026:68531
AlmaLinux:10kernel6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:8kernel4.18.0-553.164.1.el8_10ALSA-2026:68531
AlmaLinux:9kernel5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-64k6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:9kernel-64k5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-64k-core6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:9kernel-64k-core5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-64k-debug6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:9kernel-64k-debug5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-64k-debug-core6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:9kernel-64k-debug-core5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-64k-debug-devel6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:9kernel-64k-debug-devel5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-64k-debug-devel-matched6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:9kernel-64k-debug-devel-matched5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-64k-debug-modules6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:9kernel-64k-debug-modules5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-64k-debug-modules-core6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:9kernel-64k-debug-modules-core5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-64k-debug-modules-extra6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:9kernel-64k-debug-modules-extra5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-64k-devel6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:9kernel-64k-devel5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-64k-devel-matched6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:9kernel-64k-devel-matched5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-64k-modules6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:9kernel-64k-modules5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-64k-modules-core6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:9kernel-64k-modules-core5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-64k-modules-extra6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:9kernel-64k-modules-extra5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-abi-stablelists6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:8kernel-abi-stablelists4.18.0-553.164.1.el8_10ALSA-2026:68531
AlmaLinux:9kernel-abi-stablelists5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-core6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:8kernel-core4.18.0-553.164.1.el8_10ALSA-2026:68531
AlmaLinux:9kernel-core5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-cross-headers6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:8kernel-cross-headers4.18.0-553.164.1.el8_10ALSA-2026:68531
AlmaLinux:9kernel-cross-headers5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-debug6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:8kernel-debug4.18.0-553.164.1.el8_10ALSA-2026:68531
AlmaLinux:9kernel-debug5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-debug-core6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:8kernel-debug-core4.18.0-553.164.1.el8_10ALSA-2026:68531
AlmaLinux:9kernel-debug-core5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-debug-devel6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:8kernel-debug-devel4.18.0-553.164.1.el8_10ALSA-2026:68531
AlmaLinux:9kernel-debug-devel5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-debug-devel-matched6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:9kernel-debug-devel-matched5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-debug-modules6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:8kernel-debug-modules4.18.0-553.164.1.el8_10ALSA-2026:68531
AlmaLinux:9kernel-debug-modules5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-debug-modules-core6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:9kernel-debug-modules-core5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-debug-modules-extra6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:8kernel-debug-modules-extra4.18.0-553.164.1.el8_10ALSA-2026:68531
AlmaLinux:9kernel-debug-modules-extra5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-debug-uki-virt6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:9kernel-debug-uki-virt5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-devel6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:8kernel-devel4.18.0-553.164.1.el8_10ALSA-2026:68531
AlmaLinux:9kernel-devel5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-devel-matched6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:9kernel-devel-matched5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-doc6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:8kernel-doc4.18.0-553.164.1.el8_10ALSA-2026:68531
AlmaLinux:9kernel-doc5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-headers6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:8kernel-headers4.18.0-553.164.1.el8_10ALSA-2026:68531
AlmaLinux:9kernel-headers5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-modules6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:8kernel-modules4.18.0-553.164.1.el8_10ALSA-2026:68531
AlmaLinux:9kernel-modules5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-modules-core6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:9kernel-modules-core5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-modules-extra6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:8kernel-modules-extra4.18.0-553.164.1.el8_10ALSA-2026:68531
AlmaLinux:9kernel-modules-extra5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-modules-extra-matched6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:10kernel-rt6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:8kernel-rt4.18.0-553.164.1.rt7.505.el8_10ALSA-2026:68532
AlmaLinux:9kernel-rt5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-rt-64k6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:9kernel-rt-64k5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-rt-64k-core6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:9kernel-rt-64k-core5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-rt-64k-debug6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:9kernel-rt-64k-debug5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-rt-64k-debug-core6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:9kernel-rt-64k-debug-core5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-rt-64k-debug-devel6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:9kernel-rt-64k-debug-devel5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-rt-64k-debug-modules6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:9kernel-rt-64k-debug-modules5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-rt-64k-debug-modules-core6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:9kernel-rt-64k-debug-modules-core5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-rt-64k-debug-modules-extra6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:9kernel-rt-64k-debug-modules-extra5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-rt-64k-devel6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:9kernel-rt-64k-devel5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-rt-64k-modules6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:9kernel-rt-64k-modules5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-rt-64k-modules-core6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:9kernel-rt-64k-modules-core5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-rt-64k-modules-extra6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:9kernel-rt-64k-modules-extra5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-rt-core6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:8kernel-rt-core4.18.0-553.164.1.rt7.505.el8_10ALSA-2026:68532
AlmaLinux:9kernel-rt-core5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-rt-debug6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:8kernel-rt-debug4.18.0-553.164.1.rt7.505.el8_10ALSA-2026:68532
AlmaLinux:9kernel-rt-debug5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-rt-debug-core6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:8kernel-rt-debug-core4.18.0-553.164.1.rt7.505.el8_10ALSA-2026:68532
AlmaLinux:9kernel-rt-debug-core5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-rt-debug-devel6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:8kernel-rt-debug-devel4.18.0-553.164.1.rt7.505.el8_10ALSA-2026:68532
AlmaLinux:9kernel-rt-debug-devel5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-rt-debug-modules6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:8kernel-rt-debug-modules4.18.0-553.164.1.rt7.505.el8_10ALSA-2026:68532
AlmaLinux:9kernel-rt-debug-modules5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-rt-debug-modules-core6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:9kernel-rt-debug-modules-core5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-rt-debug-modules-extra6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:8kernel-rt-debug-modules-extra4.18.0-553.164.1.rt7.505.el8_10ALSA-2026:68532
AlmaLinux:9kernel-rt-debug-modules-extra5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-rt-devel6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:8kernel-rt-devel4.18.0-553.164.1.rt7.505.el8_10ALSA-2026:68532
AlmaLinux:9kernel-rt-devel5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-rt-modules6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:8kernel-rt-modules4.18.0-553.164.1.rt7.505.el8_10ALSA-2026:68532
AlmaLinux:9kernel-rt-modules5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-rt-modules-core6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:9kernel-rt-modules-core5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-rt-modules-extra6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:8kernel-rt-modules-extra4.18.0-553.164.1.rt7.505.el8_10ALSA-2026:68532
AlmaLinux:9kernel-rt-modules-extra5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-tools6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:8kernel-tools4.18.0-553.164.1.el8_10ALSA-2026:68531
AlmaLinux:9kernel-tools5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-tools-libs6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:8kernel-tools-libs4.18.0-553.164.1.el8_10ALSA-2026:68531
AlmaLinux:9kernel-tools-libs5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-tools-libs-devel6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:8kernel-tools-libs-devel4.18.0-553.164.1.el8_10ALSA-2026:68531
AlmaLinux:9kernel-tools-libs-devel5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-uki-virt6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:9kernel-uki-virt5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-uki-virt-addons6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:9kernel-uki-virt-addons5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-zfcpdump6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:8kernel-zfcpdump4.18.0-553.164.1.el8_10ALSA-2026:68531
AlmaLinux:9kernel-zfcpdump5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-zfcpdump-core6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:8kernel-zfcpdump-core4.18.0-553.164.1.el8_10ALSA-2026:68531
AlmaLinux:9kernel-zfcpdump-core5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-zfcpdump-devel6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:8kernel-zfcpdump-devel4.18.0-553.164.1.el8_10ALSA-2026:68531
AlmaLinux:9kernel-zfcpdump-devel5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-zfcpdump-devel-matched6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:9kernel-zfcpdump-devel-matched5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-zfcpdump-modules6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:8kernel-zfcpdump-modules4.18.0-553.164.1.el8_10ALSA-2026:68531
AlmaLinux:9kernel-zfcpdump-modules5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-zfcpdump-modules-core6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:9kernel-zfcpdump-modules-core5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10kernel-zfcpdump-modules-extra6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:8kernel-zfcpdump-modules-extra4.18.0-553.164.1.el8_10ALSA-2026:68531
AlmaLinux:9kernel-zfcpdump-modules-extra5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10libperf6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:9libperf5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10perf6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:8perf4.18.0-553.164.1.el8_10ALSA-2026:68531
AlmaLinux:9perf5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10python3-perf6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:8python3-perf4.18.0-553.164.1.el8_10ALSA-2026:68531
AlmaLinux:9python3-perf5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10rtla6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:9rtla5.14.0-687.42.1.el9_8ALSA-2026:59723
AlmaLinux:10rv6.12.0-211.55.1.el10_2ALSA-2026:67471
AlmaLinux:9rv5.14.0-687.42.1.el9_8ALSA-2026:59723
Debian:12linux6.1.176-1DEBIAN-CVE-2026-53131
Debian:13linux6.12.94-1DEBIAN-CVE-2026-53131
Debian:14linux7.0.13-1DEBIAN-CVE-2026-53131
Rocky Linux:10kernel0:6.12.0-211.55.1.el10_2RLSA-2026:67471
Rocky Linux:8kernel0:4.18.0-553.164.1.el8_10RLSA-2026:68531
Rocky Linux:9kernel0:5.14.0-687.42.1.el9_8RLSA-2026:59723
Rocky Linux:8kernel-rt0:4.18.0-553.164.1.rt7.505.el8_10RLSA-2026:68532
Ubuntu:22.04:LTSlinux5.15.0-191.201USN-8730-1
Ubuntu:22.04:LTSlinux5.15.0-191.201UBUNTU-CVE-2026-53131
Ubuntu:24.04:LTSlinux6.8.0-142.142UBUNTU-CVE-2026-53131
Ubuntu:24.04:LTSlinux6.8.0-142.142USN-8817-1
Ubuntu:25.10linuxno fix listedUBUNTU-CVE-2026-53131
Ubuntu:26.04:LTSlinux7.0.0-29.29UBUNTU-CVE-2026-53131
Ubuntu:26.04:LTSlinux7.0.0-29.29USN-8629-1
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-53131
Ubuntu:22.04:LTSlinux-aws5.15.0-1115.122UBUNTU-CVE-2026-53131

Affected products (as reported)

VendorProductVersions
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before 4435888e1bf139d2bfe5911643d42173821367431da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before 063f43361e884acd7300790e90194430275d0d0c1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before 726abf97566867f808fec9d8a408eb9698bd570a1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before 367abcacc13a8e2e7624408b7f593bd1e60e49d91da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before 5d634afb8b83b49de562792fd0d047416a43bd4d1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before cea435ea7e868ea6fdf039bc4f2090c1d829b5561da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – before 62443dc21114c0bbc476fa62973db89743f2f137
Linux Linux 2.6.12

Weakness: CWE-125 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H

References