GHSA-M7JG-4WJG-P9FX
Vulnerability from github – Published: 2026-09-16 12:30 – Updated: 2026-10-30 15:33In the Linux kernel, the following vulnerability has been resolved:
usb: storage: realtek_cr: fix use-after-free on disconnect
realtek_cr_destructor() calls timer_delete() before the chip containing the timer is freed. The timer callback may still be running and can rearm itself, resulting in a use-after-free.
Use timer_shutdown_sync() to wait for the callback and prevent further rearming. Do this unconditionally because ss_en may be changed after the timer is armed.
Move timer_setup() into init_realtek_cr() so the timer is initialized before any failure path can invoke the destructor.
Found by static analysis.
{
"affected": [],
"aliases": [
"CVE-2026-90029"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-16T11:17:15Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nusb: storage: realtek_cr: fix use-after-free on disconnect\n\nrealtek_cr_destructor() calls timer_delete() before the chip containing\nthe timer is freed. The timer callback may still be running and can\nrearm itself, resulting in a use-after-free.\n\nUse timer_shutdown_sync() to wait for the callback and prevent further\nrearming. Do this unconditionally because ss_en may be changed after\nthe timer is armed.\n\nMove timer_setup() into init_realtek_cr() so the timer is initialized\nbefore any failure path can invoke the destructor.\n\nFound by static analysis.",
"id": "GHSA-m7jg-4wjg-p9fx",
"modified": "2026-10-30T15:33:30Z",
"published": "2026-09-16T12:30:45Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-90029"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0935e57ede003bbe35de9c5d6a49260999ca0314"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/4ffee1aebb0c0ffcda9faffd17834ea9b00d42cc"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/524d4257f741cd95eb85e2817c9c890928fcfef7"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/7c4e2f964c65dea4ea22386799d5fb10ef1e3e54"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c1e7e35100efffba7c9e1dfa76519d6cd323ba3d"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/cae9dbba6adae21a04a3bd045e07b489847ff2c6"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f98c2f119fcd81cfede114d2fd3463a17aed8209"
}
],
"schema_version": "1.4.0",
"severity": []
}
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