From this webpage screenshot, we can extract the following key information about the vulnerability: 1. Vulnerability Description: - Title: - Description: Fixes a double-free issue in the OPTEE transport. When unloading the stack, prevents freeing the same channel descriptor twice. 2. Fix Details: - Upstream Commit: - Fix Location: - Fix Content: - Adds a check condition to ensure the channel exists before freeing the channel descriptor. - If the channel does not exist, returns 0 to avoid freeing a non-existent channel descriptor. 3. Fix Contributors: - Author: Cristian Marussi - Committer: Greg Kroah-Hartman 4. Fix Process: - Fix Process: Addresses the issue in upstream commit . - Testing: Tested by Peng Fan and Florian Fainelli. - Review: Reviewed by Peng Fan and Sudeep Holla. 5. Signatures: - Signatures: Signed by Cristian Marussi, Peng Fan, Florian Fainelli, Sudeep Holla, and Sasha Levin. 6. Code Changes: - File: - Changes: Adds a check condition to ensure the channel exists before freeing the channel descriptor. This information indicates that a double-free issue in the OPTEE transport has been fixed by adding a check to prevent freeing a channel descriptor that does not exist.