CVE-2023-3090: Out-of-bounds write in Linux kernel's ipvlan network driver

Severity: high (CVSS 7.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2023-06-28 · updated 2026-06-17
Weakness: CWE-787

Description

A heap out-of-bounds write vulnerability in the Linux Kernel ipvlan network driver can be exploited to achieve local privilege escalation. The out-of-bounds write is caused by missing skb->cb initialization in the ipvlan network driver. The vulnerability is reachable if CONFIG_IPVLAN is enabled. We recommend upgrading past commit 90cbed5247439a966b645b34eb0a2e037836ea8e.

Affected products

Debian Linux: 10.0, 11.0, 12.0
Linux kernel: from 3.19 before 4.14.316; from 4.15 before 4.19.284; from 4.20 before 5.4.244; from 5.5 before 5.10.181; from 5.11 before 5.15.113; from 5.16 before 6.1.30 — fixed in 4.14.316, 4.19.284, 5.10.181, 5.15.113, 5.4.244, 6.1.30

How to fix

Upgrade to a fixed version: Linux kernel 4.14.316, 4.19.284, 5.10.181, 5.15.113. Check the vendor advisory for mitigations.

References

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