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.

The following packages have been upgraded to a later upstream version: qemu-kvm
(6.2.0).

Security Fix(es):

* QEMU: fdc: heap buffer overflow in DMA read data transfers (CVE-2021-3507)
* libvirt: missing locking in nwfilterConnectNumOfNWFilters can lead to denial
of service (CVE-2022-0897)
* libguestfs: Buffer overflow in get_keys leads to DoS (CVE-2022-2211)
* swtpm: Unchecked header size indicator against expected size
(CVE-2022-23645)

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.

CVE-2021-3507
A heap buffer overflow was found in the floppy disk emulator of QEMU up to 6.0.0
(including). It could occur in fdctrl_transfer_handler() in hw/block/fdc.c while
processing DMA read data transfers from the floppy drive to the guest system. A
privileged guest user could use this flaw to crash the QEMU process on the host
resulting in DoS scenario, or potential information leakage from the host
memory.
CVE-2022-0897
A flaw was found in the libvirt nwfilter driver. The
virNWFilterObjListNumOfNWFilters method failed to acquire the driver->nwfilters
mutex before iterating over virNWFilterObj instances. There was no protection to
stop another thread from concurrently modifying the driver->nwfilters object.
This flaw allows a malicious, unprivileged user to exploit this issue via
libvirt's API virConnectNumOfNWFilters to crash the network filter management
daemon (libvirtd/virtnwfilterd).
CVE-2022-2211
A vulnerability was found in libguestfs. This issue occurs while calculating the
greatest possible number of matching keys in the get_keys() function. This flaw
leads to a denial of service, either by mistake or malicious actor.
CVE-2022-23645
swtpm is a libtpms-based TPM emulator with socket, character device, and Linux
CUSE interface. Versions prior to 0.5.3, 0.6.2, and 0.7.1 are vulnerable to
out-of-bounds read. A specially crafted header of swtpm's state, where the
blobheader's hdrsize indicator has an invalid value, may cause an out-of-bounds
access when the byte array representing the state of the TPM is accessed. This
will likely crash swtpm or prevent it from starting since the state cannot be
understood. Users should upgrade to swtpm v0.5.3, v0.6.2, or v0.7.1 to receive a
patch. There are currently no known workarounds.

Modularity name: virt
Stream name: rhel