Linux vulnerability

What happened

In the Linux kernel, the following vulnerability has been resolved: ALSA: mpu401: Check card index validity at probe mpu401 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: b3fe95123f0db79dd0345d249c312823178c11f5 through before 76b6bc38d0f310c0ae1b2a2ebabe2947d92c601a (git); b3fe95123f0db79dd0345d249c312823178c11f5 through before cc4215cc2a4b2a9cf8b1952bbe8d5bf925acb3ea (git); b3fe95123f0db79dd0345d249c312823178c11f5 through before 8adda66edf795d4648f8e26f312e4414c535d25a (git); b3fe95123f0db79dd0345d249c312823178c11f5 through before f7dcecb92ed192ff5fcf842918fb1aaea84b5bdd (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.