{"cve":"CVE-2023-53281","nvd":{"published":"2025-09-16T08:15:37.030","modified":"2026-06-17T06:44:43.917","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrivers: staging: rtl8723bs: Fix locking in _rtw_join_timeout_handler()\n\nCommit 041879b12ddb (\"drivers: staging: rtl8192bs: Fix deadlock in\nrtw_joinbss_event_prehandle()\") besides fixing the deadlock also\nmodified _rtw_join_timeout_handler() to use spin_[un]lock_irq()\ninstead of spin_[un]lock_bh().\n\n_rtw_join_timeout_handler() calls rtw_do_join() which takes\npmlmepriv->scanned_queue.lock using spin_[un]lock_bh(). This\nspin_unlock_bh() call re-enables softirqs which triggers an oops in\nkernel/softirq.c: __local_bh_enable_ip() when it calls\nlockdep_assert_irqs_enabled():\n\n[  244.506087] WARNING: CPU: 2 PID: 0 at kernel/softirq.c:376 __local_bh_enable_ip+0xa6/0x100\n...\n[  244.509022] Call Trace:\n[  244.509048]  <IRQ>\n[  244.509100]  _rtw_join_timeout_handler+0x134/0x170 [r8723bs]\n[  244.509468]  ? __pfx__rtw_join_timeout_handler+0x10/0x10 [r8723bs]\n[  244.509772]  ? __pfx__rtw_join_timeout_handler+0x10/0x10 [r8723bs]\n[  244.510076]  call_timer_fn+0x95/0x2a0\n[  244.510200]  __run_timers.part.0+0x1da/0x2d0\n\nThis oops is causd by the switch to spin_[un]lock_irq() which disables\nthe IRQs for the entire duration of _rtw_join_timeout_handler().\n\nDisabling the IRQs is not necessary since all code taking this lock\nruns from either user contexts or from softirqs, switch back to\nspin_[un]lock_bh() to fix this.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-667"],"references":["https://git.kernel.org/stable/c/209850f17717a3b5cc558578bef5631ac7045539","https://git.kernel.org/stable/c/215792eda008f6a1e7ed9d77fa20d582d22bb114","https://git.kernel.org/stable/c/2a50e44a66d268ee5db3d177f1fdc1503dbce6e7","https://git.kernel.org/stable/c/4ab1bace1dd3875371b481ef4301c4671bddea22","https://git.kernel.org/stable/c/dc327e87c6d9bfd9ee08e76396b3c0ba848ec554"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:08:41.295252406+00:00"},"epss":{"cve":"CVE-2023-53281","score":0.00121,"percentile":0.01854,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}