Overview
About vulnerability
In the Linux kernel, the following vulnerability has been resolved:
tee: amdtee: fix race condition in amdtee_open_session
There is a potential race condition in amdtee_open_session that may lead to use-after-free. For instance, in amdtee_open_session() after sess->sess_mask is set, and before setting:
sess->session_info[i] = session_info;
if amdtee_close_session() closes this same session, then ‘sess’ data structure will be released, causing kernel panic when ‘sess’ is accessed within amdtee_open_session().
The solution is to set the bit sess->sess_mask as the last step in amdtee_open_session().
Details
- Affected product:
- AlmaLinux 9.2 ESU , TuxCare 9.6 ESU
- Affected packages:
- kernel @ 5.14.0 (+1 more)
In the Linux kernel, the following vulnerability has been resolved:
tee: amdtee: fix race condition in amdtee_open_session
There is a potential race condition in amdtee_open_session that may lead to use-after-free. For instance, in amdtee_open_session() after sess->sess_mask is set, and before setting:
sess->session_info[i] = session_info;
if amdtee_close_session() closes this same session, then ‘sess’ data structure will be released, causing kernel panic when ‘sess’ is accessed within amdtee_open_session().
The solution is to set the bit sess->sess_mask as the last step in amdtee_open_session().