Fixed
Created: Apr 7, 2026
Updated: Aug 31, 2026
Resolved Date: Aug 31, 2026
Found In Version: 10.25.33.2
Fix Version: 10.25.33.11
Severity: Standard
Applicable for: Wind River Linux LTS 25
Component/s: Userspace
OpenPrinting CUPS is an open source printing system for Linux and other Unix-like operating systems. In versions 2.4.16 and prior, the RSS notifier allows .. path traversal in notify-recipient-uri (e.g., rss:///../job.cache), letting a remote IPP client write RSS XML bytes outside CacheDir/rss (anywhere that is lp-writable). In particular, because CacheDir is group-writable by default (typically root:lp and mode 0770), the notifier (running as lp) can replace root-managed state files via temp-file + rename(). This PoC clobbers CacheDir/job.cache with RSS XML, and after restarting cupsd the scheduler fails to parse the job cache and previously queued jobs disappear. At time of publication, there are no publicly available patches.
