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CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-31576

media: hackrf: fix to not free memory after the device is registered in hackrf_probe()

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: media: hackrf: fix to not free memory after the device is registered in hackrf_probe() In hackrf driver, the following race condition occurs: ``` CPU0 CPU1 hackrf_probe() kzalloc(); // alloc hackrf_dev .... v4l2_device_register(); .... fd = sys_open("/path/to/dev"); // open hackrf fd .... v4l2_device_unregister(); .... kfree(); // free hackrf_dev .... sys_ioctl(fd, ...); v4l2_ioctl(); video_is_registered() // UAF!! .... sys_close(fd); v4l2_release() // UAF!! hackrf_video_release() kfree(); // DFB!! ``` When a V4L2 or video device is unregistered, the device node is removed so new open() calls are blocked. However, file descriptors that are already open-and any in-flight I/O-do not terminate immediately; they remain valid until the last reference is dropped and the driver's release() is invoked. Therefore, freeing device memory on the error path after hackrf_probe() has registered dev it will lead to a race to use-after-free vuln, since those already-open handles haven't been released yet. And since release() free memory too, race to use-after-free and double-free vuln occur. To prevent this, if device is registered from probe(), it should be modified to free memory only through release() rather than calling kfree() directly.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 8bc4a9ed85046c214458c9e82aea75d2f46cfffd to < 87b9685cca91ed715c39ba544715832d26a7f4b4affected
  • 8bc4a9ed85046c214458c9e82aea75d2f46cfffd to < 131ec9046e1c8af101aebdaec4e8095e05f3312baffected
  • 8bc4a9ed85046c214458c9e82aea75d2f46cfffd to < 67fd62e3efdc9dce01f76d95a745212f4feb38e6affected
  • 8bc4a9ed85046c214458c9e82aea75d2f46cfffd to < 45cbaf5c7cdc5386d86377f0daf94a17a007fed0affected
  • 8bc4a9ed85046c214458c9e82aea75d2f46cfffd to < 98a0a81ce78020c2522e0046f49d200de9778cb9affected
  • 8bc4a9ed85046c214458c9e82aea75d2f46cfffd to < 07e9e674b6146b1f6fc41b1f54b8968bf2802824affected
  • 8bc4a9ed85046c214458c9e82aea75d2f46cfffd to < 2145c71a8044362e82e9923f001ba2aeb771b848affected
  • 8bc4a9ed85046c214458c9e82aea75d2f46cfffd to < fcd1d70792a35c8a97414fe429f48311e41269c2affected
  • 8bc4a9ed85046c214458c9e82aea75d2f46cfffd to < 3b7da2b4d0fe014eff181ed37e3bf832eb8ed258affected

Linux Linux

Default version status: affected

  • 4.4affected
  • 0 to < 4.4unaffected
  • 5.10.258 to ≤ 5.10.*unaffected
  • 5.15.209 to ≤ 5.15.*unaffected
  • 6.1.175 to ≤ 6.1.*unaffected
  • 6.6.136 to ≤ 6.6.*unaffected
  • 6.12.83 to ≤ 6.12.*unaffected
  • 6.18.24 to ≤ 6.18.*unaffected
  • 6.19.14 to ≤ 6.19.*unaffected
  • 7.0.1 to ≤ 7.0.*unaffected
  • 7.1 to ≤ *unaffected

References