CVE-2024-6505

Qemu-kvm: virtio-net: queue index out-of-bounds access in software rss

Description

A flaw was found in the virtio-net device in QEMU. When enabling the RSS feature on the virtio-net network card, the indirections_table data within RSS becomes controllable. Setting excessively large values may cause an index out-of-bounds issue, potentially resulting in heap overflow access. This flaw allows a privileged user in the guest to crash the QEMU process on the host.

Remediation

Workaround:

  • A viable mitigation for this vulnerability is to disable RSS on the nic/virtio driver. This can be performed either with the following qemu-kvm command "-device virtio-net-pci,rss=off", or, alternatively, by directly modifying the KVM XML file to disable RSS using a standard configuration tool (ex. libvirt).

Category

6.8
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.20%
Third-Party Advisory redhat.com
Affected: Red Hat Red Hat Enterprise Linux 10
Affected: Red Hat Red Hat Enterprise Linux 6
Affected: Red Hat Red Hat Enterprise Linux 7
Affected: Red Hat Red Hat Enterprise Linux 7
Affected: Red Hat Red Hat Enterprise Linux 8
Affected: Red Hat Red Hat Enterprise Linux 8 Advanced Virtualization
Affected: Red Hat Red Hat Enterprise Linux 9
Published at:
Updated at:

References

Link Tags
https://access.redhat.com/security/cve/CVE-2024-6505 third party advisory vdb entry
https://bugzilla.redhat.com/show_bug.cgi?id=2295760 issue tracking
https://security.netapp.com/advisory/ntap-20240816-0006/

Frequently Asked Questions

What is the severity of CVE-2024-6505?
CVE-2024-6505 has been scored as a medium severity vulnerability.
How to fix CVE-2024-6505?
As a workaround for remediating CVE-2024-6505: A viable mitigation for this vulnerability is to disable RSS on the nic/virtio driver. This can be performed either with the following qemu-kvm command "-device virtio-net-pci,rss=off", or, alternatively, by directly modifying the KVM XML file to disable RSS using a standard configuration tool (ex. libvirt).
Is CVE-2024-6505 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2024-6505 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2024-6505?
CVE-2024-6505 affects Red Hat Red Hat Enterprise Linux 10, Red Hat Red Hat Enterprise Linux 6, Red Hat Red Hat Enterprise Linux 7, Red Hat Red Hat Enterprise Linux 7, Red Hat Red Hat Enterprise Linux 8, Red Hat Red Hat Enterprise Linux 8 Advanced Virtualization, Red Hat Red Hat Enterprise Linux 9.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.