How severe is CVE-2021-22684?

CVE-2021-22684 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2021-22684 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-22684?

CVE-2021-22684 affects Samsung Tizenrt. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-22684?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-22684 published?

CVE-2021-22684 was published on 2021-08-31 and last updated on 2026-06-17.

CVE-2021-22684

CVE-2021-22684 is a high-severity vulnerability in Samsung Tizenrt with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-190.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (62nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-190
Affected product: Samsung Tizenrt
Published: 2021-08-31
Last modified: 2026-06-17

Description

Tizen RT RTOS version 3.0.GBB is vulnerable to integer wrap-around in functions_calloc and mm_zalloc. This improper memory assignment can lead to arbitrary memory allocation, resulting in unexpected behavior such as a crash

Frequently asked questions

What is CVE-2021-22684?: Tizen RT RTOS version 3.0.GBB is vulnerable to integer wrap-around in functions_calloc and mm_zalloc. This improper memory assignment can lead to arbitrary memory allocation, resulting in unexpected behavior such as a crash
How severe is CVE-2021-22684?: CVE-2021-22684 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2021-22684 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (62nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-22684?: CVE-2021-22684 affects Samsung Tizenrt. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-22684?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-22684 published?: CVE-2021-22684 was published on 2021-08-31 and last updated on 2026-06-17.

References

https://us-cert.cisa.gov/ics/advisories/icsa-21-119-04

Affected products (1)

cpe:2.3:o:samsung:tizenrt:*:*:*:*:*:*:*:*

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