CVE-2022-50490 (GCVE-0-2022-50490)
Vulnerability from cvelistv5
Published
2025-10-04 15:43
Modified
2025-10-04 15:43
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf: Propagate error from htab_lock_bucket() to userspace In __htab_map_lookup_and_delete_batch() if htab_lock_bucket() returns -EBUSY, it will go to next bucket. Going to next bucket may not only skip the elements in current bucket silently, but also incur out-of-bound memory access or expose kernel memory to userspace if current bucket_cnt is greater than bucket_size or zero. Fixing it by stopping batch operation and returning -EBUSY when htab_lock_bucket() fails, and the application can retry or skip the busy batch as needed.
References
Impacted products
Vendor Product Version
Linux Linux Version: 20b6cc34ea74b6a84599c1f8a70f3315b56a1883
Version: 20b6cc34ea74b6a84599c1f8a70f3315b56a1883
Version: 20b6cc34ea74b6a84599c1f8a70f3315b56a1883
Version: 20b6cc34ea74b6a84599c1f8a70f3315b56a1883
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{
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          "product": "Linux",
          "programFiles": [
            "kernel/bpf/hashtab.c"
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          "versions": [
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              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Propagate error from htab_lock_bucket() to userspace\n\nIn __htab_map_lookup_and_delete_batch() if htab_lock_bucket() returns\n-EBUSY, it will go to next bucket. Going to next bucket may not only\nskip the elements in current bucket silently, but also incur\nout-of-bound memory access or expose kernel memory to userspace if\ncurrent bucket_cnt is greater than bucket_size or zero.\n\nFixing it by stopping batch operation and returning -EBUSY when\nhtab_lock_bucket() fails, and the application can retry or skip the busy\nbatch as needed."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-10-04T15:43:43.790Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/0e13425104903970a5ede853082d3bbb4edec6f3"
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          "url": "https://git.kernel.org/stable/c/6bfee6eb3d6b96ae730a542909dd22b5f9f50d58"
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          "url": "https://git.kernel.org/stable/c/4f1f39a8f1ce1b24fee6852d7dcd704ce7c4334d"
        },
        {
          "url": "https://git.kernel.org/stable/c/66a7a92e4d0d091e79148a4c6ec15d1da65f4280"
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      "title": "bpf: Propagate error from htab_lock_bucket() to userspace",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50490",
    "datePublished": "2025-10-04T15:43:43.790Z",
    "dateReserved": "2025-10-04T15:39:19.463Z",
    "dateUpdated": "2025-10-04T15:43:43.790Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
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  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-50490\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-10-04T16:15:45.947\",\"lastModified\":\"2025-10-06T14:56:47.823\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nbpf: Propagate error from htab_lock_bucket() to userspace\\n\\nIn __htab_map_lookup_and_delete_batch() if htab_lock_bucket() returns\\n-EBUSY, it will go to next bucket. Going to next bucket may not only\\nskip the elements in current bucket silently, but also incur\\nout-of-bound memory access or expose kernel memory to userspace if\\ncurrent bucket_cnt is greater than bucket_size or zero.\\n\\nFixing it by stopping batch operation and returning -EBUSY when\\nhtab_lock_bucket() fails, and the application can retry or skip the busy\\nbatch as needed.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0e13425104903970a5ede853082d3bbb4edec6f3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/4f1f39a8f1ce1b24fee6852d7dcd704ce7c4334d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/66a7a92e4d0d091e79148a4c6ec15d1da65f4280\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6bfee6eb3d6b96ae730a542909dd22b5f9f50d58\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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