medium CVSS 5.5 EPSS <0.1%

CVE-2024-38567·Kernel vulnerability

In the Linux kernel, the following vulnerability has been resolved: wifi: carl9170: add a proper sanity check for endpoints Syzkaller reports [1] hitting a warning which is caused by presence of a wrong endpoint type at the URB sumbitting stage. While there was a check for a specific 4th endpoint, since it can switch types between bulk and interrupt, other endpoints are trusted implicitly. Similar warning is triggered in a couple of other syzbot issues [2]. Fix the issue by doing a comprehensive check of all endpoints taking into account difference between high- and full-speed configuration. [1] Syzkaller report: ... WARNING: CPU: 0 PID: 4721 at drivers/usb/core/urb.c:504 usb_submit_urb+0xed6/0x1880 drivers/usb/core/urb.c:504 ... Call Trace: <TASK> carl9170_usb_send_rx_irq_urb+0x273/0x340 drivers/net/wireless/ath/carl9170/usb.c:504 carl9170_usb_init_device drivers/net/wireless/ath/carl9170/usb.c:939 [inline] carl9170_usb_firmware_finish drivers/net/wireless/ath/carl9170/usb.c:999 [inline] carl9170_usb_firmware_step2+0x175/0x240 drivers/net/wireless/ath/carl9170/usb.c:1028 request_firmware_work_func+0x130/0x240 drivers/base/firmware_loader/main.c:1107 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:308 </TASK> [2] Related syzkaller crashes:

Severity
medium
Software
Kernel
Fixed in
6.9.3
Published

How likely is exploitation

FIRST's Exploit Prediction Scoring System puts the probability of this CVE being exploited in the next 30 days at <0.1% — higher than 1% of all published CVEs. EPSS is an independent forecast of exploitation, not a severity rating: it says nothing about how much damage a successful attack does, which is what a CVSS score measures.

Affected versions

From: 6.9

Until: 6.9.3

Fixed in: 6.9.3

How to fix this CVE

Update your Linux kernel to version 6.9.3 or later to patch endpoint validation vulnerabilities in the carl9170 USB WiFi driver. This fix implements comprehensive sanity checks for all USB endpoints, preventing incorrect endpoint type configurations that could trigger kernel warnings and system instability. Apply the update through your distribution's package manager immediately.

sudo dnf update kernel kernel-devel

Defensia detects this vulnerability

How to check if you are affected

  1. Step 1: Check your current kernel version with `uname -r` and compare against the vulnerable range (6.9 through 6.9.2)
  2. Step 2: Verify if carl9170 WiFi driver is loaded with `lsmod | grep carl9170` - if output is empty, this device is not present
  3. Step 3: Search kernel logs for USB submission warnings related to carl9170 with `sudo dmesg | grep -i 'carl9170\|usb_submit_urb.*504'`
  4. Step 4: After patching, verify the new kernel version with `uname -r` and confirm it shows 6.9.3 or higher

FAQ

What is CVE-2024-38567?

This vulnerability affects the carl9170 USB WiFi driver in the Linux kernel, where inadequate endpoint type validation allows mismatched endpoint configurations to be submitted to the USB subsystem, triggering kernel warnings and potential denial of service.

Is CVE-2024-38567 being actively exploited?

No, this vulnerability is not listed in CISA's Known Exploited Vulnerabilities catalog and has no public exploits available. It was discovered through fuzzing by Syzkaller.

What versions of Kernel are affected by CVE-2024-38567?

Linux kernel versions 6.9 through 6.9.2 are vulnerable. Version 6.9.3 and later contain the fix.

How do I check if my server is vulnerable to CVE-2024-38567?

Run `uname -r` to check your kernel version - if it shows 6.9.0 through 6.9.2, you are vulnerable. Then run `lsmod | grep carl9170` to determine if the affected driver is loaded on your system.

Does Defensia detect CVE-2024-38567?

Yes — Defensia's CVE advisory scanner compares installed package versions against the NVD database. If the Linux kernel is installed on a monitored server, CVE-2024-38567 will appear in your dashboard with remediation steps.

Related Kernel CVEs

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CVE-2026-64268CVSS 9.8In the Linux kernel, the following vulnerability has been resolved: RDMA/siw: bound Read Response placement to the RREAD length In drivers/infiniband/sw/siw/siw_qp_rx.c, siw_proc_rresp() places each inbound Read Response DDP segment at sge->laddr + wqe->processed and then accumulates wqe->processed, but it never checks the running total against the sink buffer length on continuation segments. siw_check_sge() resolves and validates the sink memory only on the first fragment (the if (!*mem) branch), and siw_rresp_check_ntoh() compares the cumulative length against wqe->bytes only on the final segment (the !frx->more_ddp_segs guard). A connected siw peer that answers an outstanding RREAD with Read Response segments that keep the DDP Last flag clear, carrying more total payload than the RREAD requested, drives wqe->processed past the validated sink buffer; the next siw_rx_data() call writes out of bounds at sge->laddr + wqe->processed. siw runs iWARP over ordinary routable TCP, so the peer is the remote end of an established RDMA connection and needs no local privilege. Bound every segment before placement, exactly as siw_proc_send() and siw_proc_write() already do for their tagged and untagged paths, and terminate the connection with a base-or-bounds DDP error when the Read Response would overrun the sink buffer. This is the second receive-path length fix for this file. A separate change rejects an MPA FPDU length that underflows the per-fragment remainder in the header decode; that guard does not cover this case, because here each individual segment length is self-consistent and only the accumulated placement offset overruns the buffer.
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References

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