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Ubuntu 21.10 and 20.04 LTS USN-5309-1: Virglrenderer Denial of Service

ubuntu
Calendar Grey February 28, 2022
Dist Ubuntu Esm H88
Patches have been implemented to mitigate various virglrenderer security flaws in Ubuntu 21.10 and 20.04 LTS, focusing on resolving memory management concerns.
Several security issues were fixed in virglrenderer.

Summary

Several security issues were fixed in virglrenderer.

Software Description:

- virglrenderer: virtual GPU for KVM virtualization

Details:

It was discovered that virglrenderer incorrectly handled memory. An

attacker inside a guest could use this issue to cause virglrenderer to

crash, resulting in a denial of service, or possibly execute arbitrary

code. (CVE-2022-0135)

It was discovered that virglrenderer incorrectly initialized memory. An

attacker inside a guest could possibly use this issue to obtain sensitive

host information. (CVE-2022-0175)

Topics%20covered

Topics Covered

security advisory denial of service ubuntu memory handling virglrenderer

Update Instructions

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 21.10:
  libvirglrenderer1               0.8.2-5ubuntu0.21.10.1

Ubuntu 20.04 LTS:
  libvirglrenderer1               0.8.2-1ubuntu1.1

After a standard system update you need to restart all virtual machines to
make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-5309-1

CVE-2022-0135, CVE-2022-0175

Severity
critical
Lowest
Low
Medium
High
Critical

February 28, 2022

Topics%20covered

Topics Covered

security advisory denial of service ubuntu memory handling virglrenderer

Package Information

https://launchpad.net/ubuntu/+source/virglrenderer/0.8.2-5ubuntu0.21.10.1
https://launchpad.net/ubuntu/+source/virglrenderer/0.8.2-1ubuntu1.1

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