CVE-2021-22684Network attack vector

Remote crash via allocation-size integer wraparound

Published Aug 31, 2021 · Updated Aug 3, 2024

Integer wraparound in Samsung TizenRT before 3.0.GBB allows remote attackers to crash the operating system through crafted allocations. The functions_calloc and mm_zalloc paths fail to reject allocation-size arithmetic that wraps before memory is assigned. No authentication or user interaction is required; the documented consequence is a crash, not data disclosure or modification.

CVSS severity7.5
High
EPSS probability1.10%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer wraparound in Samsung TizenRT before 3.0.GBB allows remote attackers to crash the operating system through crafted allocations. The functions_calloc and mm_zalloc paths fail to reject allocation-size arithmetic that wraps before memory is assigned. No authentication or user interaction is required; the documented consequence is a crash, not data disclosure or modification.

The record

CVE
CVE-2021-22684
Published
Aug 31, 2021
Updated
Aug 3, 2024
Vendor
Samsung Electronics
Product
TizenRT
Classifications
CWE-190, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 31, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=Version 3.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Samsung Electronics · TizenRTversion=Version 3.0

Published CVSS scores

7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5.0NVDAV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-190Integer Overflow or Wraparound
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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