Linux vulnerability

What happened

In the Linux kernel, the following vulnerability has been resolved: ALSA: dummy: Check card index validity at probe snd_dummy_probe() blindly trusts that the given devptr->id value is within the proper card index range. 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: 6e65c1cc4458b2784224759b6137a50d4f65e610 through before b7579e86afcec932e169d10e2d603abed8dd2fdf (git); 6e65c1cc4458b2784224759b6137a50d4f65e610 through before 4d0892a90b57f0e89b274c3f3c51c2fa17937c88 (git); 6e65c1cc4458b2784224759b6137a50d4f65e610 through before b20eb7ecbdaa3e649023fe41b177d90983ffb487 (git); 6e65c1cc4458b2784224759b6137a50d4f65e610 through before c9f10a001c243d1f069ebb0e2f4999ad4043a254 (git); 6e65c1cc4458b2784224759b6137a50d4f65e610 through before f20c2c32ec1c5c3526f29a03b487c55a5890996c (git); 6e65c1cc4458b2784224759b6137a50d4f65e610 through before 3dba0e92e18980cb5a4d70a9a263539ae4f0c7ec (git); 6e65c1cc4458b2784224759b6137a50d4f65e610 through before 690b721b9595f9a43395fd4047a832c42b5b6078 (git); 6e65c1cc4458b2784224759b6137a50d4f65e610 through before 02442d5fe8ee365a084b055d4fa81a0c1abfc3fd (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.