What’s Vulnerable › Vulnerabilities

CVE-2026-89949: batman-adv: dat: avoid unaligned fault in IP extraction

• 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: 2026-09-16 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: batman-adv: dat: avoid unaligned fault in IP extraction Independent of the alignment of the ARP packet in the SKB, either the batadv_arp_ip_src or the batadv_arp_ip_dst will have an unaligned access (on HW without native unaligned read support). Use get_unaligned() to handle this properly on all architectures.

Affected products

• Linux kernel: 3.8 — 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/0121afa52cdb88cfb4d5d7bd126a23a9100121d8
• https://git.kernel.org/stable/c/0c2df865338bbf92aa45b9253e5f9b8ef2d9992f
• https://git.kernel.org/stable/c/15dbfb37f0e1a085d48deeb8f5238e9d28127dde
• https://git.kernel.org/stable/c/1cfa7d5f70d54cb8c7e82df739430782d1996ee1
• https://git.kernel.org/stable/c/91c99b4e152023c7d458a5dedd52d2b0d7df4ce3
• https://git.kernel.org/stable/c/a170d4617e8cca05a1314de61728a262ef272782
• https://git.kernel.org/stable/c/b1bbc694ca51adb8dbed3f3235b4fcbdb44e0e20
• https://git.kernel.org/stable/c/c74a4acf41d19f21199dec2d6c813c90d31cd02c

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