How severe is CVE-2021-27411?

CVE-2021-27411 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability low.

Is CVE-2021-27411 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-27411?

CVE-2021-27411 affects Silabs Micrium Os. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-27411?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-27411 published?

CVE-2021-27411 was published on 2022-05-03 and last updated on 2026-06-17.

CVE-2021-27411

CVE-2021-27411 is a medium-severity vulnerability in Silabs Micrium Os with a CVSS 3.x base score of 6.5. 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: Medium (CVSS 3.x base score 6.5)
CVSS v2: 6.4
EPSS exploit prediction: 1% (53rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-190
Affected product: Silabs Micrium Os
Published: 2022-05-03
Last modified: 2026-06-17

Description

Micrium OS Versions 5.10.1 and prior are vulnerable to integer wrap-around in functions Mem_DynPoolCreate, Mem_DynPoolCreateHW and Mem_PoolCreate. This unverified memory assignment can lead to arbitrary memory allocation, resulting in unexpected behavior such as very small blocks of memory being allocated instead of very large ones.

Frequently asked questions

What is CVE-2021-27411?: Micrium OS Versions 5.10.1 and prior are vulnerable to integer wrap-around in functions Mem_DynPoolCreate, Mem_DynPoolCreateHW and Mem_PoolCreate. This unverified memory assignment can lead to arbitrary memory allocation, resulting in unexpected behavior such as very small blocks of memory being allocated instead of very large ones.
How severe is CVE-2021-27411?: CVE-2021-27411 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity low, and availability low.
Is CVE-2021-27411 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-27411?: CVE-2021-27411 affects Silabs Micrium Os. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-27411?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-27411 published?: CVE-2021-27411 was published on 2022-05-03 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:o:silabs:micrium_os:*:*:*:*:*:*:*:*

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