{"cve":"CVE-2022-50716","nvd":{"published":"2025-12-24T13:15:58.253","modified":"2026-06-17T05:24:03.417","status":"Deferred","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ar5523: Fix use-after-free on ar5523_cmd() timed out\n\nsyzkaller reported use-after-free with the stack trace like below [1]:\n\n[   38.960489][    C3] ==================================================================\n[   38.963216][    C3] BUG: KASAN: use-after-free in ar5523_cmd_tx_cb+0x220/0x240\n[   38.964950][    C3] Read of size 8 at addr ffff888048e03450 by task swapper/3/0\n[   38.966363][    C3]\n[   38.967053][    C3] CPU: 3 PID: 0 Comm: swapper/3 Not tainted 6.0.0-09039-ga6afa4199d3d-dirty #18\n[   38.968464][    C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.0-1.fc36 04/01/2014\n[   38.969959][    C3] Call Trace:\n[   38.970841][    C3]  <IRQ>\n[   38.971663][    C3]  dump_stack_lvl+0xfc/0x174\n[   38.972620][    C3]  print_report.cold+0x2c3/0x752\n[   38.973626][    C3]  ? ar5523_cmd_tx_cb+0x220/0x240\n[   38.974644][    C3]  kasan_report+0xb1/0x1d0\n[   38.975720][    C3]  ? ar5523_cmd_tx_cb+0x220/0x240\n[   38.976831][    C3]  ar5523_cmd_tx_cb+0x220/0x240\n[   38.978412][    C3]  __usb_hcd_giveback_urb+0x353/0x5b0\n[   38.979755][    C3]  usb_hcd_giveback_urb+0x385/0x430\n[   38.981266][    C3]  dummy_timer+0x140c/0x34e0\n[   38.982925][    C3]  ? notifier_call_chain+0xb5/0x1e0\n[   38.984761][    C3]  ? rcu_read_lock_sched_held+0xb/0x60\n[   38.986242][    C3]  ? lock_release+0x51c/0x790\n[   38.987323][    C3]  ? _raw_read_unlock_irqrestore+0x37/0x70\n[   38.988483][    C3]  ? __wake_up_common_lock+0xde/0x130\n[   38.989621][    C3]  ? reacquire_held_locks+0x4a0/0x4a0\n[   38.990777][    C3]  ? lock_acquire+0x472/0x550\n[   38.991919][    C3]  ? rcu_read_lock_sched_held+0xb/0x60\n[   38.993138][    C3]  ? lock_acquire+0x472/0x550\n[   38.994890][    C3]  ? dummy_urb_enqueue+0x860/0x860\n[   38.996266][    C3]  ? do_raw_spin_unlock+0x16f/0x230\n[   38.997670][    C3]  ? dummy_urb_enqueue+0x860/0x860\n[   38.999116][    C3]  call_timer_fn+0x1a0/0x6a0\n[   39.000668][    C3]  ? add_timer_on+0x4a0/0x4a0\n[   39.002137][    C3]  ? reacquire_held_locks+0x4a0/0x4a0\n[   39.003809][    C3]  ? __next_timer_interrupt+0x226/0x2a0\n[   39.005509][    C3]  __run_timers.part.0+0x69a/0xac0\n[   39.007025][    C3]  ? dummy_urb_enqueue+0x860/0x860\n[   39.008716][    C3]  ? call_timer_fn+0x6a0/0x6a0\n[   39.010254][    C3]  ? cpuacct_percpu_seq_show+0x10/0x10\n[   39.011795][    C3]  ? kvm_sched_clock_read+0x14/0x40\n[   39.013277][    C3]  ? sched_clock_cpu+0x69/0x2b0\n[   39.014724][    C3]  run_timer_softirq+0xb6/0x1d0\n[   39.016196][    C3]  __do_softirq+0x1d2/0x9be\n[   39.017616][    C3]  __irq_exit_rcu+0xeb/0x190\n[   39.019004][    C3]  irq_exit_rcu+0x5/0x20\n[   39.020361][    C3]  sysvec_apic_timer_interrupt+0x8f/0xb0\n[   39.021965][    C3]  </IRQ>\n[   39.023237][    C3]  <TASK>\n\nIn ar5523_probe(), ar5523_host_available() calls ar5523_cmd() as below\n(there are other functions which finally call ar5523_cmd()):\n\nar5523_probe()\n-> ar5523_host_available()\n   -> ar5523_cmd_read()\n      -> ar5523_cmd()\n\nIf ar5523_cmd() timed out, then ar5523_host_available() failed and\nar5523_probe() freed the device structure.  So, ar5523_cmd_tx_cb()\nmight touch the freed structure.\n\nThis patch fixes this issue by canceling in-flight tx cmd if submitted\nurb timed out.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/340524ae7b53a72cf5d9e7bd7790433422b3b12f","https://git.kernel.org/stable/c/3eca9697c2f3905dea3ad2fc536ebaa1fbd735bd","https://git.kernel.org/stable/c/601ae89375033ac4870c086e24ba03f235d38e55","https://git.kernel.org/stable/c/6447beefd21326a3f4719ec2ea511df797f6c820","https://git.kernel.org/stable/c/7360b323e0343ea099091d4ae09576dbe1f09516"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:17:07.138532058+00:00"},"epss":{"cve":"CVE-2022-50716","score":0.00284,"percentile":0.20955,"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."]}