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

High severity · published Mar 8, 2023

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

7.5

CVSS

0.5%

EPSS

On KEV

Description

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

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Attack vector

Network

Complexity

Low

Privileges

None

User interaction

None

Confidentiality

None

Integrity

High

Availability

None

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)0.5% · higher than 42% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

Kernel · Linux

<=4.19.90-2211.4.0.0177, <=5.10.0-60.67.0.92 · source: vendor

Openeuler Kernel · Openatom

through 4.19.90-2211.4.0.0177; 5.0 through 5.10.0-60.67.0.92 · source: NVD

Affected product

Kernel

Linux

All Kernel CVEs

References

NVD

https://nvd.nist.gov/vuln/detail/CVE-2021-33639

CVE.org

https://www.cve.org/CVERecord?id=CVE-2021-33639

Permissions Required

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