GHSA-CQ4F-H5G8-8R5H
Vulnerability from github – Published: 2024-06-20 12:31 – Updated: 2024-08-19 18:32In the Linux kernel, the following vulnerability has been resolved:
ALSA: hda: Fix UAF of leds class devs at unbinding
The LED class devices that are created by HD-audio codec drivers are registered via devm_led_classdev_register() and associated with the HD-audio codec device. Unfortunately, it turned out that the devres release doesn't work for this case; namely, since the codec resource release happens before the devm call chain, it triggers a NULL dereference or a UAF for a stale set_brightness_delay callback.
For fixing the bug, this patch changes the LED class device register and unregister in a manual manner without devres, keeping the instances in hda_gen_spec.
{
"affected": [],
"aliases": [
"CVE-2022-48735"
],
"database_specific": {
"cwe_ids": [
"CWE-416"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-06-20T12:15:11Z",
"severity": "HIGH"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: hda: Fix UAF of leds class devs at unbinding\n\nThe LED class devices that are created by HD-audio codec drivers are\nregistered via devm_led_classdev_register() and associated with the\nHD-audio codec device. Unfortunately, it turned out that the devres\nrelease doesn\u0027t work for this case; namely, since the codec resource\nrelease happens before the devm call chain, it triggers a NULL\ndereference or a UAF for a stale set_brightness_delay callback.\n\nFor fixing the bug, this patch changes the LED class device register\nand unregister in a manual manner without devres, keeping the\ninstances in hda_gen_spec.",
"id": "GHSA-cq4f-h5g8-8r5h",
"modified": "2024-08-19T18:32:03Z",
"published": "2024-06-20T12:31:21Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-48735"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0e629052f013eeb61494d4df2f1f647c2a9aef47"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/549f8ffc7b2f7561bea7f90930b6c5104318e87b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/813e9f3e06d22e29872d4fd51b54992d89cf66c8"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/a7de1002135cf94367748ffc695a29812d7633b5"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
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