CVE-2026-54229

A race condition was found in the abrt-dbus D-Bus service's ChownProblemDir method. ChownProblemDir opens the dump directory with DD_OPEN_READONLY and calls dd_chown to change ownership of all files to the caller's uid, succeeding even while post-create event handlers hold a write lock. This allows an attacker to gain filesystem-level control of the dump directory while privileged event scripts are still running.

Red Hat is aware of this vulnerability affecting ABRT (Automatic Bug Reporting Tool). ABRT was deprecated in Red Hat Enterprise Linux 8 and is not available in Red Hat Enterprise Linux 9 or later. Users of RHEL 8 who have ABRT installed are encouraged to disable or remove it. Fedora users are affected on Fedora 43 and Fedora 44 where ABRT is still shipped.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

The following practices would help for avoiding exposure and mitigate this flaw:

• Disable or remove ABRT if it is not required. On RHEL 8 systems where ABRT is installed, it can be disabled with: systemctl disable --now abrtd.service abrt-journal-core.service abrt-oops.service abrt-xorg.service
• On Fedora systems, consider using systemd-coredump instead of ABRT for crash handling
• Restrict local user access to systems running ABRT, as this vulnerability requires local access