Medium [CVE-2026-54231] Abrt: unsanitized systemd journal content written to dump directory files enables content injection
This medium-severity Red Hat Linux advisory covers CVE-2026-54231 affecting Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7.
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Summary
A content injection vulnerability was found in the ABRT post-create event handler scripts in libreport. The event script queries the systemd journal for log entries matching the crashed process and writes the results to files in the dump directory without sanitizing embedded control characters.
A local user can inject arbitrary content into the journal output by embedding newline characters in syslog messages, controlling the content that root writes to dump directory files. Red Hat is aware of this vulnerability affecting ABRT event handler scripts in libreport.
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. Red Hat severity: Moderate — CVSS 5.5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N).
Weakness: CWE-74. Affected Red Hat products: Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7.
Will not fix / out of support: Red Hat Enterprise Linux 6. Red Hat fixing advisory: RHSA-2026:54272.
Affected products named by the advisory: Red Hat package: abrt.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
- abrt-0:2.10.9-26.el8_10
- RHSA-2026:54272
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
Mitigation checklist
- 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
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
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