CVE-2026-54231

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.

Affected Software

VendorProductVersion RangeStatus
Red HatRed Hat Enterprise Linux 80:2.10.9-26.el8_10 < *unaffected
Red HatRed Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support0:2.10.9-25.el8_4.2 < *unaffected
Red HatRed Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On0:2.10.9-25.el8_4.2 < *unaffected
Red HatRed Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support0:2.10.9-25.el8_6.2 < *unaffected
Red HatRed Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On0:2.10.9-25.el8_6.2 < *unaffected
Red HatRed Hat Enterprise Linux 8.8 Telecommunications Update Service0:2.10.9-25.el8_8.2 < *unaffected
Red HatRed Hat Enterprise Linux 8.8 Update Services for SAP Solutions0:2.10.9-25.el8_8.2 < *unaffected

Weaknesses

  • CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

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: partial

References