ghsa-fjgx-ff76-7ggv
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
serial: max3100: Update uart_driver_registered on driver removal
The removal of the last MAX3100 device triggers the removal of the driver. However, code doesn't update the respective global variable and after insmod — rmmod — insmod cycle the kernel oopses:
max3100 spi-PRP0001:01: max3100_probe: adding port 0 BUG: kernel NULL pointer dereference, address: 0000000000000408 ... RIP: 0010:serial_core_register_port+0xa0/0x840 ... max3100_probe+0x1b6/0x280 [max3100] spi_probe+0x8d/0xb0
Update the actual state so next time UART driver will be registered again.
Hugo also noticed, that the error path in the probe also affected by having the variable set, and not cleared. Instead of clearing it move the assignment after the successfull uart_register_driver() call.
{
"affected": [],
"aliases": [
"CVE-2024-38633"
],
"database_specific": {
"cwe_ids": [
"CWE-476"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-06-21T11:15:12Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nserial: max3100: Update uart_driver_registered on driver removal\n\nThe removal of the last MAX3100 device triggers the removal of\nthe driver. However, code doesn\u0027t update the respective global\nvariable and after insmod \u2014 rmmod \u2014 insmod cycle the kernel\noopses:\n\n max3100 spi-PRP0001:01: max3100_probe: adding port 0\n BUG: kernel NULL pointer dereference, address: 0000000000000408\n ...\n RIP: 0010:serial_core_register_port+0xa0/0x840\n ...\n max3100_probe+0x1b6/0x280 [max3100]\n spi_probe+0x8d/0xb0\n\nUpdate the actual state so next time UART driver will be registered\nagain.\n\nHugo also noticed, that the error path in the probe also affected\nby having the variable set, and not cleared. Instead of clearing it\nmove the assignment after the successfull uart_register_driver() call.",
"id": "GHSA-fjgx-ff76-7ggv",
"modified": "2024-09-09T15:30:37Z",
"published": "2024-06-21T12:31:21Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2024-38633"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/21a61a7fbcfdd3493cede43ebc7c4dfae2147a8b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/361a92c9038e8c8c3996f8eeaa14522a8ad90752"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/712a1fcb38dc7cac6da63ee79a88708fbf9c45ec"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9db4222ed8cd3e50b81c8b910ae74c26427a4003"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b6eb7aff23e05f362e8c9b560f6ac5e727b70e00"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e8a10089eddba40d4b2080c9d3fc2d2b2488f762"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e8e2a4339decad7e59425b594a98613402652d72"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/fa84ca78b048dfb00df0ef446f5c35e0a98ca6a0"
},
{
"type": "WEB",
"url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html"
}
],
"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"
}
]
}