EUVD-2026-36638
GHSA-c3cq-8jxp-w66j
Severity by source
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Local D-Bus call (AV:L) by any logged-in user (PR:L), no UI, success requires winning a narrow lock race (AC:H), yielding ownership-level control over privileged dump files (C/I/A:H).
Primary rating from Vendor (redhat).
CVSS VectorVendor: redhat
Lifecycle Timeline
2DescriptionCVE.org
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.
AnalysisAI
Local privilege escalation in the abrt-dbus D-Bus service on Red Hat Enterprise Linux 6, 7, and 8 allows a low-privileged local user to race the ChownProblemDir method against still-running post-create event handlers. By invoking ChownProblemDir while privileged event scripts hold a write lock on the dump directory, the attacker gains filesystem ownership of files being written by root-context handlers, enabling tampering with privileged output and potential privilege escalation. No public exploit identified at time of analysis, and the issue is not listed in CISA KEV.
Technical ContextAI
ABRT (Automatic Bug Reporting Tool) exposes a system-level D-Bus interface (abrt-dbus) used to manage crash dump directories under /var/spool/abrt or /var/tmp/abrt. The ChownProblemDir method is intended to transfer ownership of a problem directory to the requesting user so they can read their own crash data, and it opens the dump directory with the DD_OPEN_READONLY flag before calling dd_chown to recursively chown all files. The root cause is CWE-362 (Concurrent Execution using Shared Resource with Improper Synchronization, i.e. a race condition): DD_OPEN_READONLY bypasses the directory's write-lock protocol, so the chown succeeds even while a separate privileged post-create event handler still holds the write lock and is producing files in the same directory. The result is a TOCTOU/locking gap between the privileged event pipeline and the unprivileged user that the dump is later handed to.
RemediationAI
No vendor-released patch identified at time of analysis from the provided input - track https://access.redhat.com/security/cve/CVE-2026-54229 and Bugzilla https://bugzilla.redhat.com/show_bug.cgi?id=2488532 for the fixed abrt package versions for RHEL 6, 7, and 8 and apply them via yum/dnf once published. As a compensating control until a patch is available, restrict who can talk to the abrt-dbus service by tightening the org.freedesktop.problems / com.redhat.problems D-Bus policy in /etc/dbus-1/system.d/ to administrators only (this will break end-user retrieval of their own crash reports), or stop and mask the abrtd / abrt-dbus services with systemctl mask abrt-dbus.service abrtd.service on hosts where automated crash reporting is non-essential (side effect: no crash collection for support cases). On shared multi-user systems also consider disabling abrt post-create event scripts in /etc/libreport/events.d/ to shrink the race window, accepting reduced crash-handling automation.
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Same weakness CWE-362 – Race Condition
View allSame technique Information Disclosure
View allVendor StatusVendor
SUSE
Severity: Important| Product | Status |
|---|---|
| SUSE Liberty Linux 8 | Fixed |
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External POC / Exploit Code
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