GHSA-FF75-3HC4-J344
Vulnerability from github – Published: 2025-01-11 15:30 – Updated: 2025-01-31 18:31In the Linux kernel, the following vulnerability has been resolved:
pinmux: Use sequential access to access desc->pinmux data
When two client of the same gpio call pinctrl_select_state() for the same functionality, we are seeing NULL pointer issue while accessing desc->mux_owner.
Let's say two processes A, B executing in pin_request() for the same pin and process A updates the desc->mux_usecount but not yet updated the desc->mux_owner while process B see the desc->mux_usecount which got updated by A path and further executes strcmp and while accessing desc->mux_owner it crashes with NULL pointer.
Serialize the access to mux related setting with a mutex lock.
cpu0 (process A) cpu1(process B)
pinctrl_select_state() { pinctrl_select_state() { pin_request() { pin_request() { ... .... } else { desc->mux_usecount++; desc->mux_usecount && strcmp(desc->mux_owner, owner)) {
if (desc->mux_usecount > 1)
return 0;
desc->mux_owner = owner;
} }
{
"affected": [],
"aliases": [
"CVE-2024-47141"
],
"database_specific": {
"cwe_ids": [
"CWE-667"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-01-11T13:15:21Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\npinmux: Use sequential access to access desc-\u003epinmux data\n\nWhen two client of the same gpio call pinctrl_select_state() for the\nsame functionality, we are seeing NULL pointer issue while accessing\ndesc-\u003emux_owner.\n\nLet\u0027s say two processes A, B executing in pin_request() for the same pin\nand process A updates the desc-\u003emux_usecount but not yet updated the\ndesc-\u003emux_owner while process B see the desc-\u003emux_usecount which got\nupdated by A path and further executes strcmp and while accessing\ndesc-\u003emux_owner it crashes with NULL pointer.\n\nSerialize the access to mux related setting with a mutex lock.\n\n\tcpu0 (process A)\t\t\tcpu1(process B)\n\npinctrl_select_state() {\t\t pinctrl_select_state() {\n pin_request() {\t\t\t\tpin_request() {\n ...\n\t\t\t\t\t\t ....\n } else {\n desc-\u003emux_usecount++;\n \t\t\t\t\t\tdesc-\u003emux_usecount \u0026\u0026 strcmp(desc-\u003emux_owner, owner)) {\n\n if (desc-\u003emux_usecount \u003e 1)\n return 0;\n desc-\u003emux_owner = owner;\n\n }\t\t\t\t\t\t}",
"id": "GHSA-ff75-3hc4-j344",
"modified": "2025-01-31T18:31:04Z",
"published": "2025-01-11T15:30:27Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-47141"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/2da32aed4a97ca1d70fb8b77926f72f30ce5fb4b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/5a3e85c3c397c781393ea5fb2f45b1f60f8a4e6e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c11e2ec9a780f54982a187ee10ffd1b810715c85"
}
],
"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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