From this webpage screenshot, we can extract the following key information regarding the vulnerability: 1. Stalld is a daemon designed to prevent operating system thread starvation. 2. Use of fixed temporary file path: In , a fixed path is used to cache raw values in the kernel. This enables symlink attacks and file pre-creation attacks. 3. Symlink attack: If the kernel’s setting is not effective, an attacker can create arbitrary files in the system, leading to a local denial-of-service. 4. File pre-creation attack: Even if the kernel’s setting is enabled, attackers can bypass protection by pre-creating files, thereby writing arbitrary values into the system. 5. Exploitability: When the service starts, untrusted local users have no opportunity to exploit this issue. However, if the service is started or restarted later, the attack vector becomes exploitable. 6. Recommended fix: It is suggested to place the file in the directory, which is owned by root. Additionally, some hardening measures can be applied in the systemd unit, such as . 7. fill_process_comm() function may read unexpected control characters: This function reads content from , which may contain any data, including control characters. This could lead to log spoofing. 8. Experimental FIFO acceleration feature may risk system lockup: Using the command-line switch, stalld can be instructed to switch pending tasks to scheduling. This may cause system lockup, as if a task re-occupies the CPU, the entire system could lock up. 9. Accessing /proc//status,comm may lead to race conditions: During process traversal, race conditions may occur, causing the target process to be replaced by another process, thereby confusing stalld. Although this “stall” scenario can be easily triggered by a local attacker, the likelihood is low. 10. Unusual umask setting: In the function, an unusual umask value is used, which may result in world-writable files being created, though it does not immediately pose a security issue. 11. No CVE assigned: Since the upstream project did not respond and these issues were not confirmed, no CVE assignment was requested. However, the issue regarding the use of fixed temporary files (point 2) may warrant a CVE assignment. 12. Timeline: The progress of reporting the issues is outlined, including reporting to the upstream GitLab project, requesting responses, and eventually publishing the information. This information provides a detailed description of potential security vulnerabilities in the Stalld daemon, including attack vectors, possible exploitation methods, and recommended remediation steps.