GHSA-78XC-39M5-V2C6
Vulnerability from github – Published: 2026-02-18 18:30 – Updated: 2026-02-19 18:31In the Linux kernel, the following vulnerability has been resolved:
PCI: endpoint: Avoid creating sub-groups asynchronously
The asynchronous creation of sub-groups by a delayed work could lead to a NULL pointer dereference when the driver directory is removed before the work completes.
The crash can be easily reproduced with the following commands:
# cd /sys/kernel/config/pci_ep/functions/pci_epf_test # for i in {1..20}; do mkdir test && rmdir test; done
BUG: kernel NULL pointer dereference, address: 0000000000000088 ... Call Trace: configfs_register_group+0x3d/0x190 pci_epf_cfs_work+0x41/0x110 process_one_work+0x18f/0x350 worker_thread+0x25a/0x3a0
Fix this issue by using configfs_add_default_group() API which does not have the deadlock problem as configfs_register_group() and does not require the delayed work handler.
[mani: slightly reworded the description and added stable list]
{
"affected": [],
"aliases": [
"CVE-2025-71233"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-02-18T16:22:30Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nPCI: endpoint: Avoid creating sub-groups asynchronously\n\nThe asynchronous creation of sub-groups by a delayed work could lead to a\nNULL pointer dereference when the driver directory is removed before the\nwork completes.\n\nThe crash can be easily reproduced with the following commands:\n\n # cd /sys/kernel/config/pci_ep/functions/pci_epf_test\n # for i in {1..20}; do mkdir test \u0026\u0026 rmdir test; done\n\n BUG: kernel NULL pointer dereference, address: 0000000000000088\n ...\n Call Trace:\n configfs_register_group+0x3d/0x190\n pci_epf_cfs_work+0x41/0x110\n process_one_work+0x18f/0x350\n worker_thread+0x25a/0x3a0\n\nFix this issue by using configfs_add_default_group() API which does not\nhave the deadlock problem as configfs_register_group() and does not require\nthe delayed work handler.\n\n[mani: slightly reworded the description and added stable list]",
"id": "GHSA-78xc-39m5-v2c6",
"modified": "2026-02-19T18:31:43Z",
"published": "2026-02-18T18:30:40Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-71233"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/24a253c3aa6d9a2cde46158ce9782e023bfbf32d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5f609b3bffd4207cf9f2c9b41e1978457a5a1ea9"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/73cee890adafa2c219bb865356e08e7f82423fe5"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8cb905eca73944089a0db01443c7628a9e87012d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/d9af3cf58bb4c8d6dea4166011c780756b1138b5"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/fa9fb38f5fe9c80094c2138354d45cdc8d094d69"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
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