CVE-2026-45838 (GCVE-0-2026-45838)
Vulnerability from cvelistv5
Published
2026-05-27 09:24
Modified
2026-06-14 17:46
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf: fix end-of-list detection in cgroup_storage_get_next_key() list_next_entry() never returns NULL -- when the current element is the last entry it wraps to the list head via container_of(). The subsequent NULL check is therefore dead code and get_next_key() never returns -ENOENT for the last element, instead reading storage->key from a bogus pointer that aliases internal map fields and copying the result to userspace. Replace it with list_entry_is_head() so the function correctly returns -ENOENT when there are no more entries.
Impacted products
Vendor Product Version
Linux Linux Version: de9cbbaadba5adf88a19e46df61f7054000838f6
Version: de9cbbaadba5adf88a19e46df61f7054000838f6
Version: de9cbbaadba5adf88a19e46df61f7054000838f6
Version: de9cbbaadba5adf88a19e46df61f7054000838f6
Version: de9cbbaadba5adf88a19e46df61f7054000838f6
Version: de9cbbaadba5adf88a19e46df61f7054000838f6
Version: de9cbbaadba5adf88a19e46df61f7054000838f6
Version: de9cbbaadba5adf88a19e46df61f7054000838f6
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              "version": "0",
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      "cpeApplicability": [
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          "nodes": [
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: fix end-of-list detection in cgroup_storage_get_next_key()\n\nlist_next_entry() never returns NULL -- when the current element is the\nlast entry it wraps to the list head via container_of(). The subsequent\nNULL check is therefore dead code and get_next_key() never returns\n-ENOENT for the last element, instead reading storage-\u003ekey from a bogus\npointer that aliases internal map fields and copying the result to\nuserspace.\n\nReplace it with list_entry_is_head() so the function correctly returns\n-ENOENT when there are no more entries."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-14T17:46:05.613Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/0f3d9dd5e1fd52b39e25328307c6a694e994ffe3"
        },
        {
          "url": "https://git.kernel.org/stable/c/26d3339e465e54107bd85884341d1609c5300d6a"
        },
        {
          "url": "https://git.kernel.org/stable/c/2c88b2d96e1d4d0c7c4589a4593d4cdee6d332d6"
        },
        {
          "url": "https://git.kernel.org/stable/c/b4b5a20bed82130da2f2818f04d52378952fbd0b"
        },
        {
          "url": "https://git.kernel.org/stable/c/85a2f30e40f7468db732f55659bc6318874f49af"
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          "url": "https://git.kernel.org/stable/c/32ce55d424395904986f5066f8755f6cb9993377"
        },
        {
          "url": "https://git.kernel.org/stable/c/fc39753b7f92e09177777e9c648afe5aa3abb81f"
        },
        {
          "url": "https://git.kernel.org/stable/c/5828b9e5b272ecff7cf5d345128d3de7324117f7"
        }
      ],
      "title": "bpf: fix end-of-list detection in cgroup_storage_get_next_key()",
      "x_generator": {
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-45838",
    "datePublished": "2026-05-27T09:24:36.561Z",
    "dateReserved": "2026-05-13T15:03:33.077Z",
    "dateUpdated": "2026-06-14T17:46:05.613Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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