CVE-2026-93286

In the Linux kernel, the following vulnerability has been resolved:

net: appletalk: fix NULL pointer dereference in aarp_send_ddp()

aarp_send_ddp() calls atalk_find_dev_addr(dev) in the LocalTalk fast

path without checking for NULL. When the device has no AppleTalk

interface configured (dev->atalk_ptr == NULL), this leads to a NULL

pointer dereference at the at->s_net access.

KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]

RIP: 0010:aarp_send_ddp (net/appletalk/aarp.c:552 (discriminator 2))

Call Trace:

<TASK>

atalk_sendmsg (net/appletalk/ddp.c:1715)

__sys_sendto (net/socket.c:2265 (discriminator 1))

__x64_sys_sendto (net/socket.c:2272)

do_syscall_64 (arch/x86/entry/syscall_64.c:94)

entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)

Add a NULL check consistent with the other callers of

atalk_find_dev_addr().