Bug 2418548 (CVE-2025-55181)

Summary: CVE-2025-55181 proxygen: Denial of service via large HTTP request/response body
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: medium    
Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in proxygen. This vulnerability allows a denial of service (DoS) via sending an HTTP (Hypertext Transfer Protocol) request/response body with greater than 2^31 bytes, triggering an infinite loop and unbounded memory growth.
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Description OSIDB Bzimport 2025-12-02 23:01:14 UTC 
Sending an HTTP request/response body with greater than 2^31 bytes triggers an infinite loop in proxygen::coro::HTTPQuicCoroSession which blocks the backing event loop and unconditionally appends data to a std::vector per-loop iteration. This issue leads to unbounded memory growth and eventually causes the process to run out of memory.