libmodulemd DOS via unlimited nested YAML xmd recursion
CVE-2026-92822 Published on October 21, 2026
Libmodulemd: libmodulemd: unbounded recursion when parsing nested xmd yaml
A flaw was found in libmodulemd. When parsing module metadata, the xmd field is converted into nested GVariant values through recursive YAML mapping and sequence helpers without a recursion-depth or node-count limit. An attacker who can supply crafted modulemd YAML with deeply nested xmd content can cause stack exhaustion or excessive resource consumption, resulting in a denial of service.
Vulnerability Analysis
CVE-2026-92822 is exploitable with local system access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Timeline
Reported to Red Hat.
Made public. 156 days later.
Weakness Type
What is a Stack Exhaustion Vulnerability?
The product does not properly control the amount of recursion which takes place, consuming excessive resources, such as allocated memory or the program stack.
CVE-2026-92822 has been classified to as a Stack Exhaustion vulnerability or weakness.
Products Associated with CVE-2026-92822
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