CVE-2021-27439

Published: May 3, 2022Modified: Jun 17, 2026

9.8

Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitability: 3.9 / Impact: 5.9

Source: NVD

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.

Affected (1)

Products: Tencent: Tencentos Tiny

1 product

Configuration A

1 vulnerable

Vulnerable Software	Affected Versions
Tencent Tencentos Tiny	Version 3.1.0

Related CWEs

Integer Overflow or Wraparound

The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

References (2)

https://www.cisa.gov/uscert/ics/advisories/icsa-21-119-04

Source: ics-cert@hq.dhs.gov

Third Party AdvisoryUS Government Resource

https://www.cisa.gov/uscert/ics/advisories/icsa-21-119-04

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party AdvisoryUS Government Resource

Timeline

No history available yet.