How severe is CVE-2021-33639?

CVE-2021-33639 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 high, and availability none.

Is CVE-2021-33639 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-33639?

CVE-2021-33639 affects Openatom Openeuler Kernel. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-33639?

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-2021-33639 published?

CVE-2021-33639 was published on 2023-03-08 and last updated on 2026-06-17.

CVE-2021-33639

CVE-2021-33639 is a high-severity vulnerability in Openatom Openeuler Kernel 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-749.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 0% (38th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-749
Affected product: Openatom Openeuler Kernel
Published: 2023-03-08
Last modified: 2026-06-17

Description

REMAP cmd of SVM driver can be used to remap read only memory as read-write, then cause read only memory/file modified.

Frequently asked questions

What is CVE-2021-33639?: REMAP cmd of SVM driver can be used to remap read only memory as read-write, then cause read only memory/file modified.
How severe is CVE-2021-33639?: CVE-2021-33639 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 high, and availability none.
Is CVE-2021-33639 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (38th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-33639?: CVE-2021-33639 affects Openatom Openeuler Kernel. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-33639?: 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-2021-33639 published?: CVE-2021-33639 was published on 2023-03-08 and last updated on 2026-06-17.

References

https://gitee.com/openeuler/kernel/commit/e4d0684a3ce68e7f8e11408121e791cd80312b27

Affected products (1)

cpe:2.3:o:openatom:openeuler_kernel:*:*:*:*:*:*:*:*

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