Linux vulnerability

What happened

In the Linux kernel, the following vulnerability has been resolved: ALSA: portman2x4: Check card index validity at probe Although portman2x4 driver has a check of the given devptr->id value, it doesn't check for a negative id, which is often given as "none" or such value when bound via sysfs. This may lead 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: 757e119bf52b014b3181eed97b01f87a245b8ff9 through before 0ce391090809d610647f424b9b1dc24aa2c546fd (git); 757e119bf52b014b3181eed97b01f87a245b8ff9 through before d7ef7890e3e35b4ba09e76fc6b72047a1599a5e8 (git); 757e119bf52b014b3181eed97b01f87a245b8ff9 through before e1ce8ad1009b1736b3044b3324350dcfdd516f42 (git); 757e119bf52b014b3181eed97b01f87a245b8ff9 through before 3690ef20469d5959378260e2752f2314a2572913 (git); 2.6.21 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.