CVE-2022-50542

HIGH EPSS 4.4%
Published Oct 7, 20258mo ago · Modified Jun 17, 20261w ago
7.8 CVSS 3.1
High
Find Similar
Published Oct 7, 2025 8mo ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: media: si470x: Fix use-after-free in si470x_int_in_callback() syzbot reported use-after-free in si470x_int_in_callback() [1]. This indicates that urb->context, which contains struct si470x_device object, is freed when si470x_int_in_callback() is called. The cause of this issue is that si470x_int_in_callback() is called for freed urb. si470x_usb_driver_probe() calls si470x_start_usb(), which then calls usb_submit_urb() and si470x_start(). If si470x_start_usb() fails, si470x_usb_driver_probe() doesn't kill urb, but it just frees struct si470x_device object, as depicted below: si470x_usb_driver_probe() ... si470x_start_usb() ... usb_submit_urb() retval = si470x_start() return retval if (retval < 0) free struct si470x_device object, but don't kill urb This patch fixes this issue by killing urb when si470x_start_usb() fails and urb is submitted. If si470x_start_usb() fails and urb is not submitted, i.e. submitting usb fails, it just frees struct si470x_device object.

CVSS Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
4.4% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-416 Use After Free Memory Safety

Affected Products 8

VendorProductVersionRange
linuxlinux_kernel*≥3.6  –  <4.9.337
linuxlinux_kernel*≥4.10  –  <4.14.303
linuxlinux_kernel*≥4.15  –  <4.19.270
linuxlinux_kernel*≥4.20  –  <5.4.229
linuxlinux_kernel*≥5.5  –  <5.10.163
linuxlinux_kernel*≥5.11  –  <5.15.86
linuxlinux_kernel*≥5.16  –  <6.0.16
linuxlinux_kernel*≥6.1  –  <6.1.2

References 9

  • git.kernel.org https://git.kernel.org/stable/c/0ca298d548461d29615f9a2b1309e8dcf4a352c6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/146bd005ebb01ae190c22af050cb98623958c373
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/1c6447d0fc68650e51586dde79b5090d9d77f13a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/52f54fe78cca24850a30865037250f63eb3d5bf7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/63648a7bd1a7599bcc2040a6d1792363ae4c2e1b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6c8aee0c8fcc6dda94315f7908e8fa9bc75abe75
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7d21e0b1b41b21d628bf2afce777727bd4479aa5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8c6151b8e8dd2d98ad2cd725d26d1e103d989891
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/92b0888398e4ba51d93b618a6506781f4e3879c9
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/0ca298d548461d29615f9a2b1309e8dcf4a352c6
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/146bd005ebb01ae190c22af050cb98623958c373
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/1c6447d0fc68650e51586dde79b5090d9d77f13a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/52f54fe78cca24850a30865037250f63eb3d5bf7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/63648a7bd1a7599bcc2040a6d1792363ae4c2e1b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6c8aee0c8fcc6dda94315f7908e8fa9bc75abe75
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7d21e0b1b41b21d628bf2afce777727bd4479aa5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8c6151b8e8dd2d98ad2cd725d26d1e103d989891
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/92b0888398e4ba51d93b618a6506781f4e3879c9
    Patch