PatchSiren cyber security CVE debrief
CVE-2026-54231 Red Hat CVE debrief
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.
- Vendor
- Red Hat
- Product
- Red Hat Enterprise Linux 6
- CVSS
- MEDIUM 5.5
- CISA KEV
- Not listed in stored evidence
- Original CVE published
- 2026-06-13
- Original CVE updated
- 2026-06-13
- Advisory published
- 2026-06-13
- Advisory updated
- 2026-06-13
Who should care
Users of libreport, particularly those using ABRT post-create event handler scripts, should be aware of this vulnerability. Successful exploitation could allow a local user to inject arbitrary content into files written by root in the dump directory.
Technical summary
The vulnerability exists in the ABRT post-create event handler scripts in libreport. The scripts do not properly sanitize control characters from log entries retrieved from the systemd journal. This allows a local user to inject newline characters into syslog messages, which can then be written to files in the dump directory by root.
Defensive priority
MEDIUM
Recommended defensive actions
- Apply patches or updates provided by the vendor to sanitize control characters in log entries.
- Restrict access to the dump directory to prevent exploitation.
- Monitor system logs for suspicious activity.
Evidence notes
The CVE-2026-54231 vulnerability has a CVSS score of 5.5 and is classified as MEDIUM severity. The vulnerability was published on June 13, 2026, and has not been modified since.
Official resources
CVE-2026-54231 was published on 2026-06-13T03:16:21.877Z.