CVE-2021-31795

Name: CVE-2021-31795
Creator: NVD / NIST
Published: 2021-04-24T18:15:07.683+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7/10EPSS 0.36%

Last modified Jun 17, 2026

CVE-2021-31795 is a high-severity vulnerability rated 7/10 on the CVSS scale. The PowerVR GPU kernel driver in pvrsrvkm.ko through 2021-04-24 for the Linux kernel, as used on Alcatel 1S phones, allows attackers to overwrite heap memory via PhysmemNewRamBackedPMR.. EPSS estimates a 0.36% chance of exploitation in the next 30 days.

Description

The PowerVR GPU kernel driver in pvrsrvkm.ko through 2021-04-24 for the Linux kernel, as used on Alcatel 1S phones, allows attackers to overwrite heap memory via PhysmemNewRamBackedPMR.

Metrics

CVSS 3.1

7/10

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

EPSS Probability

0.36%

28.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Pvrsrvkm.Ko Project	Pvrsrvkm.Ko	<= 2021-04-24

References

https://mcyoloswagham.github.io/linux/Exploit, Third Party Advisory
https://mcyoloswagham.github.io/linux/Exploit, Third Party Advisory

Timeline

Published: Apr 24, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-31795?

The PowerVR GPU kernel driver in pvrsrvkm.ko through 2021-04-24 for the Linux kernel, as used on Alcatel 1S phones, allows attackers to overwrite heap memory via PhysmemNewRamBackedPMR.

How severe is CVE-2021-31795?

CVE-2021-31795 has a CVSS score of 7/10 (HIGH severity). The EPSS model estimates a 0.36% probability of exploitation in the next 30 days.

How do I fix CVE-2021-31795?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-31795?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST