CVE-2026-93286 (GCVE-0-2026-93286)

Vulnerability from cvelistv5 – Published: 2026-09-24 16:02 – Updated: 2026-09-24 16:02
VLAI
Title
net: appletalk: fix NULL pointer dereference in aarp_send_ddp()
Summary
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().
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 8fc30f0cdf4207a5aa2341c0a98d0f1713b3ce2c (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 83899a056aeb120898a6e3a989971fc63e274e2e (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 9e7f36ab5b7bf68463faa5f7b926fea8f35597bb (git)
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Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 6.12.111 , ≤ 6.12.* (semver)
Unaffected: 6.18.53 , ≤ 6.18.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/appletalk/aarp.c"
          ],
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          "vendor": "Linux",
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                  "vulnerable": true
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                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: appletalk: fix NULL pointer dereference in aarp_send_ddp()\n\naarp_send_ddp() calls atalk_find_dev_addr(dev) in the LocalTalk fast\npath without checking for NULL. When the device has no AppleTalk\ninterface configured (dev-\u003eatalk_ptr == NULL), this leads to a NULL\npointer dereference at the at-\u003es_net access.\n\n KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]\n RIP: 0010:aarp_send_ddp (net/appletalk/aarp.c:552 (discriminator 2))\n Call Trace:\n  \u003cTASK\u003e\n  atalk_sendmsg (net/appletalk/ddp.c:1715)\n  __sys_sendto (net/socket.c:2265 (discriminator 1))\n  __x64_sys_sendto (net/socket.c:2272)\n  do_syscall_64 (arch/x86/entry/syscall_64.c:94)\n  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)\n\nAdd a NULL check consistent with the other callers of\natalk_find_dev_addr()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-24T16:02:10.463Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/8fc30f0cdf4207a5aa2341c0a98d0f1713b3ce2c"
        },
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        {
          "url": "https://git.kernel.org/stable/c/9e7f36ab5b7bf68463faa5f7b926fea8f35597bb"
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      "title": "net: appletalk: fix NULL pointer dereference in aarp_send_ddp()",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-93286",
    "datePublished": "2026-09-24T16:02:10.463Z",
    "dateReserved": "2026-09-17T16:02:15.099Z",
    "dateUpdated": "2026-09-24T16:02:10.463Z",
    "state": "PUBLISHED"
  },
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  "vulnerability-lookup:meta": {
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      "date": "2026-09-28",
      "epss": "0.00166",
      "percentile": "0.05205"
    },
    "microsoft_vex": {
      "current_release_date": "2026-09-28T02:33:02.000Z",
      "cve": "CVE-2026-93286",
      "id": "msrc_CVE-2026-93286",
      "initial_release_date": "2026-09-28T02:33:02.000Z",
      "product_status:known_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "net: appletalk: fix NULL pointer dereference in aarp_send_ddp()",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-93286.json",
      "version": "1"
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            ],
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          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: appletalk: fix NULL pointer dereference in aarp_send_ddp()\n\naarp_send_ddp() calls atalk_find_dev_addr(dev) in the LocalTalk fast\npath without checking for NULL. When the device has no AppleTalk\ninterface configured (dev-\u003eatalk_ptr == NULL), this leads to a NULL\npointer dereference at the at-\u003es_net access.\n\n KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]\n RIP: 0010:aarp_send_ddp (net/appletalk/aarp.c:552 (discriminator 2))\n Call Trace:\n  \u003cTASK\u003e\n  atalk_sendmsg (net/appletalk/ddp.c:1715)\n  __sys_sendto (net/socket.c:2265 (discriminator 1))\n  __x64_sys_sendto (net/socket.c:2272)\n  do_syscall_64 (arch/x86/entry/syscall_64.c:94)\n  entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)\n\nAdd a NULL check consistent with the other callers of\natalk_find_dev_addr()."
          }
        ],
        "id": "CVE-2026-93286",
        "lastModified": "2026-09-24T17:17:09.810",
        "metrics": {},
        "published": "2026-09-24T17:17:09.810",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/83899a056aeb120898a6e3a989971fc63e274e2e"
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            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
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    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-25T23:49:14Z",
      "cve": "CVE-2026-93286",
      "id": "CVE-2026-93286",
      "initial_release_date": "2026-09-24T23:48:16Z",
      "product_status:known_affected": "347",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-93286",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-93286.json",
      "version": "3"
    }
  }
}



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