Linux vulnerability

What happened

In the Linux kernel, the following vulnerability has been resolved: can: ems_usb: validate CPC message lengths ems_usb_read_bulk_callback() walks CPC messages packed in one USB receive buffer. Check that each declared message fits in the URB payload. Also require the type-specific payload to cover the fields used by the CAN, state, error and overrun handlers.

Affected versions

Linux: 702171adeed3607ee9603ec30ce081411e36ae42 through before 1c380a332e342b7d58c86c4f556cb0823b16a9b8 (git); 702171adeed3607ee9603ec30ce081411e36ae42 through before bb3cc8da8a2967c0f8e83d148fc6870b19fa32c6 (git); 702171adeed3607ee9603ec30ce081411e36ae42 through before db5655287d78f00daf98888a520bb8da4d30126d (git); 702171adeed3607ee9603ec30ce081411e36ae42 through before ce8125566b1d0b0f16449407e014addf451804ea (git); 702171adeed3607ee9603ec30ce081411e36ae42 through before 0b9090717c7e2184e2c427bbcc752f295116ac1d (git); 702171adeed3607ee9603ec30ce081411e36ae42 through before 0b23144c59c126beb4a7761a85a194ae0fe668a5 (git); 702171adeed3607ee9603ec30ce081411e36ae42 through before df3ac2a672a5284441f120d486acabdd6740fc2a (git); 702171adeed3607ee9603ec30ce081411e36ae42 through before 02925f51377f2a42a6724f00549167499c9302e5 (git); 2.6.32 Fixed: See vendor advisory.

Why it matters

Review the vendor advisory and exposure of the affected product to determine operational impact.

Detection & mitigation

• Apply vendor-provided updates or mitigations.
• Review affected product exposure and access logs.