{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2024-26884",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2024-26884"
  ],
  "published": "2024-04-17T10:29:01Z",
  "summary": "bpf: Fix hashtab overflow check on 32-bit arches",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix hashtab overflow check on 32-bit arches\n\nThe hashtab code relies on roundup_pow_of_two() to compute the number of\nhash buckets, and contains an overflow check by checking if the\nresulting value is 0. However, on 32-bit arches, the roundup code itself\ncan overflow by doing a 32-bit left-shift of an unsigned long value,\nwhich is undefined behaviour, so it is not guaranteed to truncate\nneatly. This was triggered by syzbot on the DEVMAP_HASH type, which\ncontains the same check, copied from the hashtab code. So apply the same\nfix to hashtab, by moving the overflow check to before the roundup.",
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  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-26884"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/33ec04cadb77605b71d9298311919303d390c4d5"
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      "url": "https://git.kernel.org/stable/c/92c81fbb3ed2e0dfc33a4183a67135e1ab566ace"
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    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-05T11:52:36Z"
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}