CVE-2021-3544 - Missing Release of Memory after Effective Lifetime

Severity

65%

Complexity

20%

Confidentiality

66%

Several memory leaks were found in the virtio vhost-user GPU device (vhost-user-gpu) of QEMU in versions up to and including 6.0. They exist in contrib/vhost-user-gpu/vhost-user-gpu.c and contrib/vhost-user-gpu/virgl.c due to improper release of memory (i.e., free) after effective lifetime.

CVSS 3.1 Base Score 6.5. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H).

CVSS 2.0 Base Score 2.1. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (AV:L/AC:L/Au:N/C:N/I:N/A:P).

Demo Examples

Missing Release of Memory after Effective Lifetime

CWE-401

The following C function leaks a block of allocated memory if the call to read() does not return the expected number of bytes:


               
}

                     
return buf;
return NULL;

                           
return NULL;

Overview

First reported 3 years ago

2021-06-02 14:15:00

Last updated 3 years ago

2021-10-18 11:51:00

Affected Software

QEMU

References

https://bugzilla.redhat.com/show_bug.cgi?id=1958935

[oss-security] 20210531 QEMU: security issues in vhost-user-gpu

https://bugzilla.redhat.com/show_bug.cgi?id=1958935

Issue Tracking

[oss-security] 20210531 QEMU: security issues in vhost-user-gpu

Mailing List, Third Party Advisory

https://security.netapp.com/advisory/ntap-20210720-0008/

DSA-4980

https://security.netapp.com/advisory/ntap-20210720-0008/

Third Party Advisory

DSA-4980

Third Party Advisory

Stay updated

ExploitPedia is constantly evolving. Sign up to receive a notification when we release additional functionality.

Get in touch

If you'd like to report a bug or have any suggestions for improvements then please do get in touch with us using this form. We will get back to you as soon as we can.