CVE-2021-27439: Tencent Tencentos-Tiny

Critical severity, CVSS 9.8. EPSS: 1.6% chance of exploitation in the next 30 days.

TencentOS-tiny version 3.1.0 is vulnerable to integer wrap-around in function 'tos_mmheap_alloc incorrect calculation of effective memory allocation size. This improper memory assignment can lead to arbitrary memory allocation, resulting in unexpected behavior such as a crash or a remote code injection/execution.

Affected products

• Tencent Tencentos-Tiny: version 3.1.0 only

Published 2022-05-03. Last modified 2026-06-17.