(RHSA-2021:4191) Moderate: virt:rhel and virt-devel:rhel security, bug fix, and enhancement update

Kernel-based Virtual Machine (KVM) offers a full virtualization solution for Linux on numerous hardware platforms. The virt:rhel module contains packages which provide user-space components used to run virtual machines using KVM. The packages also provide APIs for managing and interacting with the virtualized systems.

Security Fix(es):

• QEMU: net: e1000e: use-after-free while sending packets (CVE-2020-15859)

• QEMU: slirp: invalid pointer initialization may lead to information disclosure (bootp) (CVE-2021-3592)

• QEMU: slirp: invalid pointer initialization may lead to information disclosure (udp6) (CVE-2021-3593)

• QEMU: slirp: invalid pointer initialization may lead to information disclosure (udp) (CVE-2021-3594)

• QEMU: slirp: invalid pointer initialization may lead to information disclosure (tftp) (CVE-2021-3595)

• libvirt: Insecure sVirt label generation (CVE-2021-3631)

• libvirt: Improper locking on ACL failure in virStoragePoolLookupByTargetPath API (CVE-2021-3667)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Additional Changes:

For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.5 Release Notes linked from the References section.