CVE-2026-89949 PUBLISHED

batman-adv: dat: avoid unaligned fault in IP extraction

Assigner: Linux
Reserved: 11.09.2026 Published: 16.09.2026 Updated: 16.09.2026

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.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from 5c3a0e5535933349a5d6e6bc8b704e0611f21d3f to b1bbc694ca51adb8dbed3f3235b4fcbdb44e0e20 (excl.)
  • affected from 5c3a0e5535933349a5d6e6bc8b704e0611f21d3f to 15dbfb37f0e1a085d48deeb8f5238e9d28127dde (excl.)
  • affected from 5c3a0e5535933349a5d6e6bc8b704e0611f21d3f to a170d4617e8cca05a1314de61728a262ef272782 (excl.)
  • affected from 5c3a0e5535933349a5d6e6bc8b704e0611f21d3f to c74a4acf41d19f21199dec2d6c813c90d31cd02c (excl.)
  • affected from 5c3a0e5535933349a5d6e6bc8b704e0611f21d3f to 91c99b4e152023c7d458a5dedd52d2b0d7df4ce3 (excl.)
  • affected from 5c3a0e5535933349a5d6e6bc8b704e0611f21d3f to 1cfa7d5f70d54cb8c7e82df739430782d1996ee1 (excl.)
  • affected from 5c3a0e5535933349a5d6e6bc8b704e0611f21d3f to 0c2df865338bbf92aa45b9253e5f9b8ef2d9992f (excl.)
  • affected from 5c3a0e5535933349a5d6e6bc8b704e0611f21d3f to 0121afa52cdb88cfb4d5d7bd126a23a9100121d8 (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 3.8 is affected
  • unaffected from 0 to 3.8 (excl.)
  • unaffected from 5.10.270 to 5.10.* (incl.)
  • unaffected from 5.15.221 to 5.15.* (incl.)
  • unaffected from 6.1.188 to 6.1.* (incl.)
  • unaffected from 6.6.157 to 6.6.* (incl.)
  • unaffected from 6.12.110 to 6.12.* (incl.)
  • unaffected from 6.18.51 to 6.18.* (incl.)
  • unaffected from 7.2.5 to 7.2.* (incl.)
  • unaffected from 7.3-rc1 to * (incl.)

References