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CVE-2026-80599: batman-adv: dat: ensure accessible eth_hdr proto field

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-28 · updated 2026-10-16

Description

In the Linux kernel, the following vulnerability has been resolved: batman-adv: dat: ensure accessible eth_hdr proto field When batadv_get_vid() accesses the proto field of the ethernet header, it is not checking if the data itself is accessible. The caller is responsible for it. But in contrast to other call sites, batadv_dat_get_vid() and its caller didn't make sure this is true. This could have caused an out-of-bounds access.

Affected products

• Linux kernel: 3.13 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/26560c4a03dc4d607331600c187f59ab2df5f341
• https://git.kernel.org/stable/c/3c62694c31f043568c3f4784b8d247cc3bea6b4c
• https://git.kernel.org/stable/c/4407ff3af469356f9641c4a6e7072309bae86bea
• https://git.kernel.org/stable/c/5836a050d02e9598fa0f71e88dde28b63dfa35e3
• https://git.kernel.org/stable/c/6d3ea37074bb747f745d28138f87745ba9bd97c5
• https://git.kernel.org/stable/c/7913935d41f166c367bbf7cc76a79e50044388e8
• https://git.kernel.org/stable/c/8f76277d02176cd739945bba3379448e2e22e799
• https://git.kernel.org/stable/c/da3677b5ed362742d30ceab31bfafcdc74dc2642

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