CVE-2026-93286net: appletalk: fix NULL pointer dereference in aarp_send_ddp()
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No exploitation reported and no EPSS estimate yet.
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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().
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 3, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 51cc5e756cec6071ffc620076aebcf5bae936668; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 8c4b9ceb1be780588c1c50d573d5ee308e0874d2; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before d643fd42ad96f19b5ce5cb11824fefa617191dbe; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 542c1dd41e1b0cd1c2c3ba8091c7d882eea0d680; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 8fc30f0cdf4207a5aa2341c0a98d0f1713b3ce2c; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 83899a056aeb120898a6e3a989971fc63e274e2e; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 9e7f36ab5b7bf68463faa5f7b926fea8f35597bb | CNA record |
References
- https://git.kernel.org/stable/c/51cc5e756cec6071ffc620076aebcf5bae936668
- https://git.kernel.org/stable/c/8c4b9ceb1be780588c1c50d573d5ee308e0874d2
- https://git.kernel.org/stable/c/d643fd42ad96f19b5ce5cb11824fefa617191dbe
- https://git.kernel.org/stable/c/542c1dd41e1b0cd1c2c3ba8091c7d882eea0d680
- https://git.kernel.org/stable/c/8fc30f0cdf4207a5aa2341c0a98d0f1713b3ce2c
- https://git.kernel.org/stable/c/83899a056aeb120898a6e3a989971fc63e274e2e
- https://git.kernel.org/stable/c/9e7f36ab5b7bf68463faa5f7b926fea8f35597bb
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.