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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
2026-08-26
Advisory published
2026-06-13
Advisory updated
2026-08-26

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.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-54231 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-54231

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-54231 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-54231

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.