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Medium severity5.5NVD Advisory· Published Jun 19, 2024· Updated May 12, 2026

CVE-2024-38565

CVE-2024-38565

Description

In the Linux kernel, the following vulnerability has been resolved:

wifi: ar5523: enable proper endpoint verification

Syzkaller reports [1] hitting a warning about an endpoint in use not having an expected type to it.

Fix the issue by checking for the existence of all proper endpoints with their according types intact.

Sadly, this patch has not been tested on real hardware.

[1] Syzkaller report: ------------[ cut here ]------------ usb 1-1: BOGUS urb xfer, pipe 3 != type 1 WARNING: CPU: 0 PID: 3643 at drivers/usb/core/urb.c:504 usb_submit_urb+0xed6/0x1880 drivers/usb/core/urb.c:504 ... Call Trace:

ar5523_cmd+0x41b/0x780 drivers/net/wireless/ath/ar5523/ar5523.c:275 ar5523_cmd_read drivers/net/wireless/ath/ar5523/ar5523.c:302 [inline] ar5523_host_available drivers/net/wireless/ath/ar5523/ar5523.c:1376 [inline] ar5523_probe+0x14b0/0x1d10 drivers/net/wireless/ath/ar5523/ar5523.c:1655 usb_probe_interface+0x30f/0x7f0 drivers/usb/core/driver.c:396 call_driver_probe drivers/base/dd.c:560 [inline] really_probe+0x249/0xb90 drivers/base/dd.c:639 __driver_probe_device+0x1df/0x4d0 drivers/base/dd.c:778 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:808 __device_attach_driver+0x1d4/0x2e0 drivers/base/dd.c:936 bus_for_each_drv+0x163/0x1e0 drivers/base/bus.c:427 __device_attach+0x1e4/0x530 drivers/base/dd.c:1008 bus_probe_device+0x1e8/0x2a0 drivers/base/bus.c:487 device_add+0xbd9/0x1e90 drivers/base/core.c:3517 usb_set_configuration+0x101d/0x1900 drivers/usb/core/message.c:2170 usb_generic_driver_probe+0xbe/0x100 drivers/usb/core/generic.c:238 usb_probe_device+0xd8/0x2c0 drivers/usb/core/driver.c:293 call_driver_probe drivers/base/dd.c:560 [inline] really_probe+0x249/0xb90 drivers/base/dd.c:639 __driver_probe_device+0x1df/0x4d0 drivers/base/dd.c:778 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:808 __device_attach_driver+0x1d4/0x2e0 drivers/base/dd.c:936 bus_for_each_drv+0x163/0x1e0 drivers/base/bus.c:427 __device_attach+0x1e4/0x530 drivers/base/dd.c:1008 bus_probe_device+0x1e8/0x2a0 drivers/base/bus.c:487 device_add+0xbd9/0x1e90 drivers/base/core.c:3517 usb_new_device.cold+0x685/0x10ad drivers/usb/core/hub.c:2573 hub_port_connect drivers/usb/core/hub.c:5353 [inline] hub_port_connect_change drivers/usb/core/hub.c:5497 [inline] port_event drivers/usb/core/hub.c:5653 [inline] hub_event+0x26cb/0x45d0 drivers/usb/core/hub.c:5735 process_one_work+0x9bf/0x1710 kernel/workqueue.c:2289 worker_thread+0x669/0x1090 kernel/workqueue.c:2436 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Missing endpoint verification in ar5523 WiFi driver causes a kernel warning on USB request submission; fix adds proper endpoint checks.

Vulnerability

Description The vulnerability in the Linux kernel's ar5523 USB WiFi driver (drivers/net/wireless/ath/ar5523/) is due to missing verification of USB endpoint types. When the driver submits a URB, it does not ensure that the endpoint has the expected type, leading to a kernel warning when a mismatch occurs (e.g., submitting a bulk URB to an interrupt endpoint). This was discovered by Syzkaller and reported as a 'BOGUS urb xfer' warning [1].

Exploitation

An attacker with physical access to a USB port can connect a malicious USB device that presents incorrect endpoint descriptors. During device probing, the ar5523 driver will attempt to communicate using the wrong pipe type, triggering the warning. The attack does not require authentication or special privileges beyond the ability to attach USB devices. The warning is triggered in the probe path, so any device that causes the driver to bind can trigger the issue.

Impact

The primary impact is a kernel warning that may cause system instability or a denial-of-service condition. While the warning itself does not directly corrupt memory, it can lead to a system crash or hang depending on the kernel configuration (e.g., panic on warnings). The warning is indicative of a logic flaw that could potentially be leveraged for more severe attacks, but the fix addresses the root cause.

Mitigation

The fix was applied in multiple stable kernel updates by adding proper endpoint verification during driver probe [2][3][4]. Users should update their kernel to a version containing the fix. The vulnerability also affects the SIMATIC S7-1500 TM MFP - GNU/Linux subsystem, which is listed in Siemens advisory SSA-265688 [1]. No workaround is available; patching is required.

References
  1. SSA-265688
  2. Making sure you're not a bot!
  3. Making sure you're not a bot!
  4. Making sure you're not a bot!

AI Insight generated on May 20, 2026. Synthesized from this CVE's description and the cited reference URLs; citations are validated against the source bundle.

Affected products

117

Patches

0

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

11

News mentions

0

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