GHSA-QM6M-JH59-WXWP
Vulnerability from github – Published: 2024-05-21 18:31 – Updated: 2025-01-06 21:30In the Linux kernel, the following vulnerability has been resolved:
spi: Fix null dereference on suspend
A race condition exists where a synchronous (noqueue) transfer can be active during a system suspend. This can cause a null pointer dereference exception to occur when the system resumes.
Example order of events leading to the exception: 1. spi_sync() calls __spi_transfer_message_noqueue() which sets ctlr->cur_msg 2. Spi transfer begins via spi_transfer_one_message() 3. System is suspended interrupting the transfer context 4. System is resumed 6. spi_controller_resume() calls spi_start_queue() which resets cur_msg to NULL 7. Spi transfer context resumes and spi_finalize_current_message() is called which dereferences cur_msg (which is now NULL)
Wait for synchronous transfers to complete before suspending by acquiring the bus mutex and setting/checking a suspend flag.
{
"affected": [],
"aliases": [
"CVE-2023-52749"
],
"database_specific": {
"cwe_ids": [
"CWE-362"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-05-21T16:15:14Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nspi: Fix null dereference on suspend\n\nA race condition exists where a synchronous (noqueue) transfer can be\nactive during a system suspend. This can cause a null pointer\ndereference exception to occur when the system resumes.\n\nExample order of events leading to the exception:\n1. spi_sync() calls __spi_transfer_message_noqueue() which sets\n ctlr-\u003ecur_msg\n2. Spi transfer begins via spi_transfer_one_message()\n3. System is suspended interrupting the transfer context\n4. System is resumed\n6. spi_controller_resume() calls spi_start_queue() which resets cur_msg\n to NULL\n7. Spi transfer context resumes and spi_finalize_current_message() is\n called which dereferences cur_msg (which is now NULL)\n\nWait for synchronous transfers to complete before suspending by\nacquiring the bus mutex and setting/checking a suspend flag.",
"id": "GHSA-qm6m-jh59-wxwp",
"modified": "2025-01-06T21:30:49Z",
"published": "2024-05-21T18:31:20Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-52749"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/4ec4508db97502a12daee88c74782e8d35ced068"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/96474ea47dc67b0704392d59192b233c8197db0e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/bef4a48f4ef798c4feddf045d49e53c8a97d5e37"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
}
]
}
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