Bug 2488568 (CVE-2026-54230)

Summary: CVE-2026-54230 abrt: event handler scripts follow symlinks when writing output files, allowing arbitrary file overwrites
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A symlink following vulnerability was found in the ABRT post-create event handler scripts in libreport. Event scripts write output files using shell redirections without the O_NOFOLLOW flag. If the target file is replaced with a symlink, the shell process running as root follows the symlink and writes content to the symlink target, allowing arbitrary file overwrites on the system.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 2488619    
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Description OSIDB Bzimport 2026-06-12 21:02:55 UTC 
A symlink following vulnerability was found in the ABRT post-create event handler scripts in /etc/libreport/events.d/abrt_event.conf. Event scripts write output files using shell redirections (e.g., "printf ... > $DUMP_DIR/var_log_messages") which use open() with O_WRONLY|O_CREAT|O_TRUNC without the O_NOFOLLOW flag. If the target file is replaced with a symlink, the shell process (running as root in the abrt_handle_event_t SELinux domain, which is effectively unconfined) follows the symlink and writes content to the symlink target. In contrast, dd_save_text (used by SetElement) correctly uses O_NOFOLLOW. An attacker who has gained filesystem control of the dump directory can replace output files with symlinks pointing to sensitive system files such as /var/spool/cron/root.