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Vulnerability · Published Jan 23, 2026 · Assigned by Linux

CVE-2026-22988arp: do not assume dev_hard_header() does not change skb->head

High 7.8

In plain English

A high-severity security flaw 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 0.1% (higher than 4% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.8High
Exploit odds (30 days)0.1%top 96.3% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

In the Linux kernel, the following vulnerability has been resolved: arp: do not assume dev_hard_header() does not change skb->head arp_create() is the only dev_hard_header() caller making assumption about skb->head being unchanged. A recent commit broke this assumption. Initialize @arp pointer after dev_hard_header() call.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:14linux6.18.8-1DEBIAN-CVE-2026-22988
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-22988
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-22988
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-22988
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-22988
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-22988
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-22988
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-22988
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-22988
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-22988
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-22988
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-22988
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-22988
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-22988
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-22988
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-22988
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-22988
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-22988
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-22988
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-22988
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-22988
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-22988
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-22988
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-22988
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-22988
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-22988
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-22988
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2026-22988
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2026-22988
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2026-22988
Ubuntu:24.04:LTSlinux-oem-6.11no fix listedUBUNTU-CVE-2026-22988
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2026-22988
Ubuntu:24.04:LTSlinux-oem-6.8no fix listedUBUNTU-CVE-2026-22988
Ubuntu:24.04:LTSlinux-oracle-6.14no fix listedUBUNTU-CVE-2026-22988
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2026-22988
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2026-22988
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-22988
Ubuntu:24.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2026-22988
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-22988
Ubuntu:24.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2026-22988
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2026-22988
Ubuntu:24.04:LTSlinux-riscv-6.14no fix listedUBUNTU-CVE-2026-22988
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2026-22988
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2026-22988
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2026-22988
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2026-22988

Affected products (as reported)

VendorProductVersions
Linux Linux 17e7386234f740f3e7d5e58a47b5847ea34c3bc2 – before e432dbff342b95fe44645f9a90fcf333c80f4b5e41a1a3140aff295dee8063906f70a514548105e8 – before 393525dee5c39acff8d6705275d7fcaabcfb7f0aadee129db814474f2f81207bd182bf343832a52e – before 70bddc16491ef4681f3569b3a2c80309a3edcdd11717357007db150c2d703f13f5695460e960f26c – before 029935507d0af6553c45380fbf6feecf756fd2265fe210533e3459197eabfdbf97327dacbdc04d60 – before dd6ccec088adff4bdf33e2b2dd102df20a7128fa91a2b25be07ce1a7549ceebbe82017551d2eec92 – before 949647e7771a4a01963fe953a96d81fba7acecf3db5b4e39c4e63700c68a7e65fc4e1f1375273476 – before c92510f5e3f82ba11c95991824a41e59a9c5ed81
Linux Linux 6.1.160 – before 6.1.1616.6.120 – before 6.6.1216.12.64 – before 6.12.666.18.4 – before 6.18.6

References