CVE-2026-93286: Linux kernel · net: appletalk: fix NULL pointer dereference in aarp_send_ddp()
Affects Linux kernelSource GCVE Database
Not known to be exploited.
Data as of 26 Oct 2026, 17:16 UTC
Rated by Threat Radar · CVSS not yet scored by NVD
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Exploitation evidence
Disclosed: evidence found.
CVE published 24 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 26.04 LTSlinuxpkg:deb/ubuntu/linux?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-awspkg:deb/ubuntu/linux-aws?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azurepkg:deb/ubuntu/linux-azure?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-azure-fdepkg:deb/ubuntu/linux-azure-fde?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gcppkg:deb/ubuntu/linux-gcp?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Ubuntu 26.04 LTSlinux-gkepkg:deb/ubuntu/linux-gke?arch=source&distro=resoluteOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
A fix has been applied to the Linux kernel source code to add the necessary NULL pointer check in aarp_send_ddp(). Users should update to a kernel version that includes this fix. Patch status is not explicitly stated in the input data; therefore, check the vendor advisory or Linux kernel release notes for the exact fixed versions and apply updates accordingly.
Description
A NULL pointer dereference vulnerability in the Linux kernel's AppleTalk networking code (aarp_send_ddp function) has been resolved. The flaw occurs when the device has no AppleTalk interface configured, leading to a NULL pointer dereference and potential kernel crash. This issue has been fixed by adding a NULL check consistent with other callers of the affected function.
References
- ubuntu.com/security/CVE-2026-93286 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2026-93286 (opens in a new tab)
- git.kernel.org/stable/c/83899a056aeb120898a6e3a989971fc63e274e2e (opens in a new tab)
- git.kernel.org/stable/c/8fc30f0cdf4207a5aa2341c0a98d0f1713b3ce2c (opens in a new tab)
- git.kernel.org/stable/c/9e7f36ab5b7bf68463faa5f7b926fea8f35597bb (opens in a new tab)
- nvd.nist.gov/vuln/detail/CVE-2026-93286 (opens in a new tab)
- git.kernel.org/stable/c/51cc5e756cec6071ffc620076aebcf5bae936668 (opens in a new tab)
- git.kernel.org/stable/c/542c1dd41e1b0cd1c2c3ba8091c7d882eea0d680 (opens in a new tab)
- git.kernel.org/stable/c/8c4b9ceb1be780588c1c50d573d5ee308e0874d2 (opens in a new tab)
- git.kernel.org/stable/c/d643fd42ad96f19b5ce5cb11824fefa617191dbe (opens in a new tab)