ghsa-283v-8hg2-53qv
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
drivers: staging: rtl8192u: Fix deadlock in ieee80211_beacons_stop()
There is a deadlock in ieee80211_beacons_stop(), which is shown below:
(Thread 1) | (Thread 2) | ieee80211_send_beacon() ieee80211_beacons_stop() | mod_timer() spin_lock_irqsave() //(1) | (wait a time) ... | ieee80211_send_beacon_cb() del_timer_sync() | spin_lock_irqsave() //(2) (wait timer to stop) | ...
We hold ieee->beacon_lock in position (1) of thread 1 and use del_timer_sync() to wait timer to stop, but timer handler also need ieee->beacon_lock in position (2) of thread 2. As a result, ieee80211_beacons_stop() will block forever.
This patch extracts del_timer_sync() from the protection of spin_lock_irqsave(), which could let timer handler to obtain the needed lock.
{
"affected": [],
"aliases": [
"CVE-2022-49305"
],
"database_specific": {
"cwe_ids": [
"CWE-667"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-02-26T07:01:07Z",
"severity": "MODERATE"
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrivers: staging: rtl8192u: Fix deadlock in ieee80211_beacons_stop()\n\nThere is a deadlock in ieee80211_beacons_stop(), which is shown below:\n\n (Thread 1) | (Thread 2)\n | ieee80211_send_beacon()\nieee80211_beacons_stop() | mod_timer()\n spin_lock_irqsave() //(1) | (wait a time)\n ... | ieee80211_send_beacon_cb()\n del_timer_sync() | spin_lock_irqsave() //(2)\n (wait timer to stop) | ...\n\nWe hold ieee-\u003ebeacon_lock in position (1) of thread 1 and use\ndel_timer_sync() to wait timer to stop, but timer handler\nalso need ieee-\u003ebeacon_lock in position (2) of thread 2.\nAs a result, ieee80211_beacons_stop() will block forever.\n\nThis patch extracts del_timer_sync() from the protection of\nspin_lock_irqsave(), which could let timer handler to obtain\nthe needed lock.",
"id": "GHSA-283v-8hg2-53qv",
"modified": "2025-04-14T21:32:21Z",
"published": "2025-04-14T21:32:21Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49305"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/042915c1bfedd684c1d98a841794ee203200571a"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1fbe033c52480f7954c057510040fa6286c4ea25"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/66f769762f65d957f688f3258755c6ec410bf710"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/806c7b53414934ba2a39449b31fd1a038e500273"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b34cb54923a6e5ddefbaf358c85c922c6ab456e2"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b465bb2ebf666116c1ac745cb80c65154dc0d27e"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ffc9cab7243f8151be37966301307bfd3cda2db3"
}
],
"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"
}
]
}
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
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