docs: issues when temp is noexec

website/content/docs/debugging.mdx

@@ -1,6 +1,6 @@
 ---
 description: |
-  Learn how to debug issues with Packer builds and plugins using `packer build`, logs, and other troubleshooting tools. 
+  Learn how to debug issues with Packer builds and plugins using `packer build`, logs, and other troubleshooting tools.
 page_title: Debugging Packer
 ---
 
@@ -147,3 +147,13 @@ Failed to initialize build 'docker': error initializing builder 'docker': plugin
 
 you should try setting your temp directory to something shorter. This can be
 done through the `TMPDIR` environment variable.
+
+## Issues when temp directory does not allow execution
+
+Sometimes, Packer runs into trouble (eg: when installing a plugin ) because the system's temporary directory (/tmp) is restricted and doesn't allow programs to run there. The temp directory may have been mounted with noexec option. This may lead to `permisson denied` errors.
+
+```text
+Continuing to next available version: failed to describe plugin binary "/tmp/packer-plugin-virtualbox_v1.1.1_x5.0_linux_arm64": fork/exec /tmp/packer-plugin-virtualbox_v1.1.1_x5.0_linux_arm64: permission denied
+```
+
+To resolve this, set the `TMPDIR` environment variable to a directory that allows execution.