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CVE-2026-54228: Abrt: toctou race condition in abrt-dbus setelement allows arbitrary file writes to dump directories

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-13 · updated 2026-08-13
• Weakness: CWE-367

Description

A time-of-check time-of-use (TOCTOU) race condition was found in the abrt-dbus D-Bus service's SetElement method. Between dump directory creation and post-create event execution, any local user can call SetElement to write arbitrary text files into the root-owned dump directory, bypassing package validation and allowing crashes of unpackaged binaries to survive post-create processing.

Affected products

• Red Hat Enterprise Linux 7 Extended Lifecycle Support: all versions — fixed in 0:2.1.11-61.el7_9
• Red Hat Enterprise Linux 8: all versions — fixed in 0:2.10.9-26.el8_10
• Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support: all versions — fixed in 0:2.10.9-25.el8_4.1
• Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On: all versions — fixed in 0:2.10.9-25.el8_4.1
• Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support: all versions — fixed in 0:2.10.9-25.el8_6.1
• Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On: all versions — fixed in 0:2.10.9-25.el8_6.1
• Red Hat Enterprise Linux 8.8 Telecommunications Update Service: all versions — fixed in 0:2.10.9-25.el8_8.1
• Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions: all versions — fixed in 0:2.10.9-25.el8_8.1

How to fix

Upgrade to a fixed version: Red Hat Enterprise Linux 7 Extended Lifecycle Support 0:2.1.11-61.el7_9; Red Hat Enterprise Linux 8 0:2.10.9-26.el8_10; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:2.10.9-25.el8_4.1; Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 0:2.10.9-25.el8_4.1; Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:2.10.9-25.el8_6.1; Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On 0:2.10.9-25.el8_6.1; Red Hat Enterprise Linux 8.8 Telecommunications Update Service 0:2.10.9-25.el8_8.1; Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 0:2.10.9-25.el8_8.1. Check the vendor advisory for mitigations.

References

• https://access.redhat.com/errata/RHSA-2026:48819
• https://access.redhat.com/errata/RHSA-2026:48864
• https://access.redhat.com/errata/RHSA-2026:48865
• https://access.redhat.com/errata/RHSA-2026:48866
• https://access.redhat.com/errata/RHSA-2026:54272
• https://access.redhat.com/security/cve/CVE-2026-54228
• https://bugzilla.redhat.com/show_bug.cgi?id=2488531
• https://access.redhat.com/errata/RHSA-2026:48819
• https://access.redhat.com/errata/RHSA-2026:48864
• https://access.redhat.com/errata/RHSA-2026:48865
• https://access.redhat.com/errata/RHSA-2026:48866
• https://access.redhat.com/errata/RHSA-2026:54272

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