CVE-2026-43010 (GCVE-0-2026-43010)
Vulnerability from cvelistv5
Published
2026-05-01 14:15
Modified
2026-07-04 11:50
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf: Reject sleepable kprobe_multi programs at attach time kprobe.multi programs run in atomic/RCU context and cannot sleep. However, bpf_kprobe_multi_link_attach() did not validate whether the program being attached had the sleepable flag set, allowing sleepable helpers such as bpf_copy_from_user() to be invoked from a non-sleepable context. This causes a "sleeping function called from invalid context" splat: BUG: sleeping function called from invalid context at ./include/linux/uaccess.h:169 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 1787, name: sudo preempt_count: 1, expected: 0 RCU nest depth: 2, expected: 0 Fix this by rejecting sleepable programs early in bpf_kprobe_multi_link_attach(), before any further processing.
References
Impacted products
Vendor Product Version
Linux Linux Version: 0dcac272540613d41c05e89679e4ddb978b612f1
Version: 0dcac272540613d41c05e89679e4ddb978b612f1
Version: 0dcac272540613d41c05e89679e4ddb978b612f1
Version: 0dcac272540613d41c05e89679e4ddb978b612f1
Version: 0dcac272540613d41c05e89679e4ddb978b612f1
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Reject sleepable kprobe_multi programs at attach time\n\nkprobe.multi programs run in atomic/RCU context and cannot sleep.\nHowever, bpf_kprobe_multi_link_attach() did not validate whether the\nprogram being attached had the sleepable flag set, allowing sleepable\nhelpers such as bpf_copy_from_user() to be invoked from a non-sleepable\ncontext.\n\nThis causes a \"sleeping function called from invalid context\" splat:\n\n  BUG: sleeping function called from invalid context at ./include/linux/uaccess.h:169\n  in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 1787, name: sudo\n  preempt_count: 1, expected: 0\n  RCU nest depth: 2, expected: 0\n\nFix this by rejecting sleepable programs early in\nbpf_kprobe_multi_link_attach(), before any further processing."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-04T11:50:34.675Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        },
        {
          "url": "https://git.kernel.org/stable/c/eb7024bfcc5f68ed11ed9dd4891a3073c15f04a8"
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      ],
      "title": "bpf: Reject sleepable kprobe_multi programs at attach time",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43010",
    "datePublished": "2026-05-01T14:15:16.947Z",
    "dateReserved": "2026-05-01T14:12:55.974Z",
    "dateUpdated": "2026-07-04T11:50:34.675Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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