Description
In the Linux kernel, the following vulnerability has been resolved:
can: ems_usb: ems_usb_read_bulk_callback(): fix URB memory leak
Fix similar memory leak as in commit 7352e1d5932a ("can: gs_usb: gs_usb_receive_bulk_callback(): fix URB memory leak").
In ems_usb_open(), the URBs for USB-in transfers are allocated, added to the dev->rx_submitted anchor and submitted. In the complete callback ems_usb_read_bulk_callback(), the URBs are processed and resubmitted. In ems_usb_close() the URBs are freed by calling usb_kill_anchored_urbs(&dev->rx_submitted).
However, this does not take into account that the USB framework unanchors the URB before the complete function is called. This means that once an in-URB has been completed, it is no longer anchored and is ultimately not released in ems_usb_close().
Fix the memory leak by anchoring the URB in the ems_usb_read_bulk_callback() to the dev->rx_submitted anchor.
Metrics
No CVSS score has been published yet.
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux | >= 702171adeed3607ee9603ec30ce081411e36ae42, < e2c71030dc464d437110bcfb367c493fd402bddb; >= 702171adeed3607ee9603ec30ce081411e36ae42, < f48eabd15194b216030b32445f44230df95f5fe0; >= 702171adeed3607ee9603ec30ce081411e36ae42, < 61e6d3674c3d1da1475dc207b3e75c55d678d18e; >= 702171adeed3607ee9603ec30ce081411e36ae42, < e9410fdd4d5f7eaa6526d8c80e83029d7c86a8e8; >= 702171adeed3607ee9603ec30ce081411e36ae42, < 46a191ff7eeec33a2ccb2a1bfea34e18fbc5dc1a; >= 702171adeed3607ee9603ec30ce081411e36ae42, < 68c62b3e53901846b5f68c5a8bade72a5d9c0b87; >= 702171adeed3607ee9603ec30ce081411e36ae42, < 0ce73a0eb5a27070957b67fd74059b6da89cc516 |
| Linux | Linux | 2.6.32 |
References
- https://git.kernel.org/stable/c/0ce73a0eb5a27070957b67fd74059b6da89cc516
- https://git.kernel.org/stable/c/46a191ff7eeec33a2ccb2a1bfea34e18fbc5dc1a
- https://git.kernel.org/stable/c/61e6d3674c3d1da1475dc207b3e75c55d678d18e
- https://git.kernel.org/stable/c/68c62b3e53901846b5f68c5a8bade72a5d9c0b87
- https://git.kernel.org/stable/c/e2c71030dc464d437110bcfb367c493fd402bddb
- https://git.kernel.org/stable/c/e9410fdd4d5f7eaa6526d8c80e83029d7c86a8e8
- https://git.kernel.org/stable/c/f48eabd15194b216030b32445f44230df95f5fe0
Timeline
- Published
- Feb 4, 2026
- Last modified
- Jun 17, 2026
- NVD status
- Deferred