VULNERABILITY INTELLIGENCE

CVE-2021-27439

CVSS score7.3 HIGH
EPSS probability1.56%
CISA KEVNot currently listed
Published2022-05-03
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

Description

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.

Weakness classification

  • ics-cert@hq.dhs.gov: CWE-190

Primary references