CVE-2021-33639
First published: Wed Mar 08 2023(Updated: )
REMAP cmd of SVM driver can be used to remap read only memory as read-write, then cause read only memory/file modified.
Credit: securities@openeuler.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| openEuler kernel | <=4.19.90-2211.4.0.0177 | |
| openEuler kernel | >=5.0<=5.10.0-60.67.0.92 |
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Frequently Asked Questions
What is the severity of CVE-2021-33639?
The severity of CVE-2021-33639 is classified as high due to its potential to allow modification of read-only memory.
How do I fix CVE-2021-33639?
To fix CVE-2021-33639, update the OpenEuler kernel to a version that addresses the vulnerability.
Which versions of OpenEuler kernel are affected by CVE-2021-33639?
CVE-2021-33639 affects OpenEuler kernel versions up to 4.19.90-2211.4.0.0177 and between 5.0 and 5.10.0-60.67.0.92.
What could happen if CVE-2021-33639 is exploited?
Exploitation of CVE-2021-33639 could lead to unintended modifications of memory or files that are otherwise read-only.
Is there a workaround for CVE-2021-33639?
Currently, the recommended action for CVE-2021-33639 is to upgrade to a secure version of the OpenEuler kernel.
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- version/openeuler kernel/4.19.90-2211.4.0.0177
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- version/openeuler kernel/5.10.0-60.67.0.92