CVE-2025-38678 (GCVE-0-2025-38678)
Vulnerability from cvelistv5
Published
2025-09-03 13:01
Modified
2025-09-29 05:55
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: reject duplicate device on updates A chain/flowtable update with duplicated devices in the same batch is possible. Unfortunately, netdev event path only removes the first device that is found, leaving unregistered the hook of the duplicated device. Check if a duplicated device exists in the transaction batch, bail out with EEXIST in such case. WARNING is hit when unregistering the hook: [49042.221275] WARNING: CPU: 4 PID: 8425 at net/netfilter/core.c:340 nf_hook_entry_head+0xaa/0x150 [49042.221375] CPU: 4 UID: 0 PID: 8425 Comm: nft Tainted: G S 6.16.0+ #170 PREEMPT(full) [...] [49042.221382] RIP: 0010:nf_hook_entry_head+0xaa/0x150
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cf5fb87fcdaaaafec55dcc0dc5a9e15ead343973
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d7615bde541f16517d6790412da6ec46fa8a4c1f
Impacted products
Vendor Product Version
Linux Linux Version: 78d9f48f7f44431a25da2b46b3a8812f6ff2b981
Version: 78d9f48f7f44431a25da2b46b3a8812f6ff2b981
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   Linux Linux Version: 5.8
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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/netfilter/nf_tables_api.c"
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      "descriptions": [
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nf_tables: reject duplicate device on updates\n\nA chain/flowtable update with duplicated devices in the same batch is\npossible. Unfortunately, netdev event path only removes the first\ndevice that is found, leaving unregistered the hook of the duplicated\ndevice.\n\nCheck if a duplicated device exists in the transaction batch, bail out\nwith EEXIST in such case.\n\nWARNING is hit when unregistering the hook:\n\n [49042.221275] WARNING: CPU: 4 PID: 8425 at net/netfilter/core.c:340 nf_hook_entry_head+0xaa/0x150\n [49042.221375] CPU: 4 UID: 0 PID: 8425 Comm: nft Tainted: G S                  6.16.0+ #170 PREEMPT(full)\n [...]\n [49042.221382] RIP: 0010:nf_hook_entry_head+0xaa/0x150"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-09-29T05:55:48.624Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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          "url": "https://git.kernel.org/stable/c/d7615bde541f16517d6790412da6ec46fa8a4c1f"
        },
        {
          "url": "https://git.kernel.org/stable/c/cf5fb87fcdaaaafec55dcc0dc5a9e15ead343973"
        }
      ],
      "title": "netfilter: nf_tables: reject duplicate device on updates",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38678",
    "datePublished": "2025-09-03T13:01:15.799Z",
    "dateReserved": "2025-04-16T04:51:24.031Z",
    "dateUpdated": "2025-09-29T05:55:48.624Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-38678\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-09-03T13:15:48.897\",\"lastModified\":\"2025-09-04T15:36:56.447\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnetfilter: nf_tables: reject duplicate device on updates\\n\\nA chain/flowtable update with duplicated devices in the same batch is\\npossible. Unfortunately, netdev event path only removes the first\\ndevice that is found, leaving unregistered the hook of the duplicated\\ndevice.\\n\\nCheck if a duplicated device exists in the transaction batch, bail out\\nwith EEXIST in such case.\\n\\nWARNING is hit when unregistering the hook:\\n\\n [49042.221275] WARNING: CPU: 4 PID: 8425 at net/netfilter/core.c:340 nf_hook_entry_head+0xaa/0x150\\n [49042.221375] CPU: 4 UID: 0 PID: 8425 Comm: nft Tainted: G S                  6.16.0+ #170 PREEMPT(full)\\n [...]\\n [49042.221382] RIP: 0010:nf_hook_entry_head+0xaa/0x150\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/cf5fb87fcdaaaafec55dcc0dc5a9e15ead343973\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d7615bde541f16517d6790412da6ec46fa8a4c1f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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