Bug 2552067 (CVE-2026-110331)

Summary: CVE-2026-110331 abrt: abrt: incomplete CVE-2026-54228/54229 fix — completeness gate bypassed via attacker-supplied count element
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: rhel-process-autobot, security-response-team, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in abrt. The completeness check introduced to mitigate CVE-2026-54228 and CVE-2026-54229 only verifies that a dump directory contains a "count" element, which an unprivileged user can create. This allows a local attacker to bypass the guard and again poison elements in, or seize ownership of, dump directories while privileged ABRT handlers are processing them. Related Problems2 mutating methods remain ungated by the same check.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Deadline: 2026-11-17   

Description OSIDB Bzimport 2026-10-14 03:44:53 UTC
A flaw was found in abrt. The fix for CVE-2026-54228 and CVE-2026-54229 gates SetElement, DeleteElement, and ChownProblemDir on problem_dump_dir_is_complete(), which is implemented solely as the presence of a "count" dump element. An unprivileged caller can supply "count" via NewProblem or SetElement, so the directory appears complete from creation and the guard passes while root post-create/notify handlers are still processing the dump. Separately, the Problems2 SaveElements/DeleteElements methods and DeleteProblem lack the completeness guard. A local attacker can thereby re-open the original element-poisoning and dump-directory ownership-seizure primitives.