CVE-2026-54229

Summary

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.

Affected Software

Weaknesses

• CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

Workarounds

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

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: no
  • Technical Impact: total

abrt: ChownProblemDir succeeds during active post-create event processing due to inadequate locking

Additional References

• https://access.redhat.com/security/cve/CVE-2026-54229
• https://bugzilla.redhat.com/show_bug.cgi?id=2488532
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-54229.json

References

• https://access.redhat.com/security/cve/CVE-2026-54229
• https://bugzilla.redhat.com/show_bug.cgi?id=2488532

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