What’s Vulnerable › Vulnerabilities

CVE-2026-98495: net: arp: terminate device name before lookup

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-18 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: net: arp: terminate device name before lookup The ARP ioctl copies a user-provided struct arpreq into a stack object. Its arp_dev field may contain IFNAMSIZ bytes without a NUL terminator. Such input is passed to dev_get_by_name_rcu() or __dev_get_by_name(), where strcmp() can read past the end of the stack object when a matching alternative interface name exists. Terminate the field before the lookup to prevent the out-of-bounds read.

Affected products

• Linux kernel: 5.5 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/1b08c5c3ac27c9ff91c5309f4a32b4e91ce2263b
• https://git.kernel.org/stable/c/35e716a70733472ede300540082d64c33bf3b4c9
• https://git.kernel.org/stable/c/414bbad9928598904313299ac9e037a73f520be1
• https://git.kernel.org/stable/c/47107491b48ceef0a2faa7a010cfa961f211ef9f
• https://git.kernel.org/stable/c/7389757d88f54237951d7497d9c4dae7cc6d64be
• https://git.kernel.org/stable/c/ae6d704dbf9542b0a0830ec91a2db4f30307e7d8
• https://git.kernel.org/stable/c/ba664d83638640cf454b65167339cbf20dfd6f10
• https://git.kernel.org/stable/c/d8b6529e80bcb4fb8177121404cbb3377acaebd2

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