CVE-2026-55737: Heap pointer corruption via signed/unsigned mismatch in LARGE_TUPLE_EXT decoding in erts external term format decoder
CVE-2026-55737 is a vulnerability in Heap pointer corruption via signed/unsigned mismatch in LARGE_TUPLE_EXT decoding in erts external term format decoder, rated Moderate by Microsoft. Microsoft has not reported exploitation in the wild. The EPSS model estimates a 0.31% probability of exploitation activity in the next 30 days, higher than 24% of all scored vulnerabilities. Microsoft released the fix on 6 August 2026, outside Patch Tuesday. It affects 1 product in 1 product family (Open Source Software).
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