CVE-2025-0838

CVE-2025-0838 describes a critical heap buffer overflow in Abseil-cpp's absl::{flat,node}hash{set,map} components, affecting Abseil common_libraries and Debian distributions. This vulnerability arises from unbounded size arguments in constructors and methods like reserve() and rehash(), leading to integer overflows and subsequent out-of-bounds memory writes. With a CVSS score of 9.8 (CRITICAL), it presents a high risk due to its network-exploitable nature, low attack complexity, and potential for complete compromise of confidentiality, integrity, and availability. While there is no evidence of active exploitation, public exploit code, or KEV listing, the vulnerability has garnered some community discussion, indicating awareness.