GHSA-VMMG-RQJM-J9P9
Vulnerability from github – Published: 2026-05-01 15:30 – Updated: 2026-07-04 12:30In 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.
{
"affected": [],
"aliases": [
"CVE-2026-43010"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-05-01T15:16:44Z",
"severity": "MODERATE"
},
"details": "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.",
"id": "GHSA-vmmg-rqjm-j9p9",
"modified": "2026-07-04T12:30:27Z",
"published": "2026-05-01T15:30:36Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43010"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/89327ed787746a7aa4db3c97f91d2e294228932b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d97b19fe5265f7901b2c862f88a4eb1b129a0b61"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/dc9a060d76c12b23c5f378ee115d5e5d03d8bbf3"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/eb7024bfcc5f68ed11ed9dd4891a3073c15f04a8"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f952157e695fd434bdc05af63a703bb082a78717"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
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