Linux vulnerability

What happened

In the Linux kernel, the following vulnerability has been resolved: ALSA: hda: Fix missing pointer check in hda_component_manager_init function The __component_match_add function may assign the 'matchptr' pointer the value ERR_PTR(-ENOMEM), which will subsequently be dereferenced. The call stack leading to the error looks like this: hda_component_manager_init |-> component_match_add |-> component_match_add_release |-> __component_match_add ( ... ,**matchptr, ... ) |-> *matchptr = ERR_PTR(-ENOMEM); // assign |-> component_master_add_with_match( ... match) |-> component_match_realloc(match, match->num); // dereference Add IS_ERR() check to prevent the crash. Found by Linux Verification Center (linuxtesting.org) with SVACE.

Affected versions

Linux: ae7abe36e352eddf8e30d3b1ea3fb402514ba13b through before b044aa6ae63391ba40c93ca5d476d276cb17db1b (git); ae7abe36e352eddf8e30d3b1ea3fb402514ba13b through before 1c3f4b15eb1850558d7d4da74b98cffbb8121721 (git); ae7abe36e352eddf8e30d3b1ea3fb402514ba13b through before 218a8504e62fc2c8a1fd12523346b7a2b9bd2474 (git); ae7abe36e352eddf8e30d3b1ea3fb402514ba13b through before 47d1b9ca923b55c3f407788f1f15b04957e0e027 (git); ae7abe36e352eddf8e30d3b1ea3fb402514ba13b through before 1cf11d80db5df805b538c942269e05a65bcaf5bc (git); 5.17 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.