Linux vulnerability

What happened

In the Linux kernel, the following vulnerability has been resolved: ALSA: virmidi: Check card index validity at probe virmidi driver blindly trusts that the given devptr->id value is within the proper card index range at probe. It's OK for the devices the driver itself creates at the module probe time, but if the device is bound manually via sysfs interface, this could be -1 as "none", and this leads to OOB access for index[] and other parameters. Add a sanity check for the card index and warn/correct it if it's a value out of the range.

Affected versions

Linux: 3564fbb880f9a62ddbb81b7440c32e0e6619c52d through before 43f161c53279adac0517cf1c443e531e738b54ce (git); 3564fbb880f9a62ddbb81b7440c32e0e6619c52d through before 40ee4224e2fe24c05b92e4d37476adb6e83f10e9 (git); 3564fbb880f9a62ddbb81b7440c32e0e6619c52d through before f48c5f3b03afdb795e5f448a1d53d912d5b09f2e (git); 3564fbb880f9a62ddbb81b7440c32e0e6619c52d through before b65d5182ecd6b7a24a83d980a0d06e809ef876c5 (git); 2.6.16 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.