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CVE-2020-15863

QEMU: stack-based overflow in xgmac_enet_send() in hw/net/xgmac.c

hw/net/xgmac.c in the XGMAC Ethernet controller in QEMU before 07-20-2020 has a buffer overflow. This occurs during packet transmission and affects the highbank and midway emulated machines. A guest user or process could use this flaw to crash the QEMU process on the host, resulting in a denial of service or potential privileged code execution. This was fixed in commit 5519724a13664b43e225ca05351c60b4468e4555.

CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed
Vendors
Canonical Debian Qemu
Products
Ubuntu Linux Debian Linux Qemu
CVE-2020-15859

QEMU: net: e1000e: use-after-free while sending packets

QEMU 4.2.0 has a use-after-free in hw/net/e1000e_core.c because a guest OS user can trigger an e1000e packet with the data's address set to the e1000e's MMIO address.

CVSS 3.1 · 3.3 Low EPSS < 1% KEV · Not listed
Vendors
Debian Qemu Redhat
Products
Debian Linux Qemu Enterprise Linux
CVE-2020-15469

QEMU: MMIO ops null pointer dereference may lead to DoS

In QEMU 4.2.0, a MemoryRegionOps object may lack read/write callback methods, leading to a NULL pointer dereference.

CVSS 3.1 · 2.3 Low EPSS < 1% KEV · Not listed
Vendors
Debian Qemu
Products
Debian Linux Qemu
CVE-2020-14415

QEMU: division by zero in oss_write() in audio/ossaudio.c

oss_write in audio/ossaudio.c in QEMU before 5.0.0 mishandles a buffer position.

CVSS 3.1 · 3.3 Low EPSS < 1% KEV · Not listed
Vendors
Canonical Qemu
Products
Ubuntu Linux Qemu
CVE-2020-14394

QEMU: infinite loop in xhci_ring_chain_length() in hw/usb/hcd-xhci.c

An infinite loop flaw was found in the USB xHCI controller emulation of QEMU while computing the length of the Transfer Request Block (TRB) Ring. This flaw allows a privileged guest user to hang the QEMU process on the host, resulting in a denial of service.

CVSS 3.1 · 3.2 Low EPSS < 1% KEV · Not listed
Vendors
Fedoraproject Qemu Redhat
Products
Extra Packages For Enterprise Linux Fedora Qemu and 2 more
CVE-2020-14364

QEMU: usb: out-of-bounds r/w access issue while processing usb packets

An out-of-bounds read/write access flaw was found in the USB emulator of the QEMU in versions before 5.2.0. This issue occurs while processing USB packets from a guest when USBDevice 'setup_len' exceeds its 'data_buf[4096]' in the do_token_in, do_token_out routines. This flaw allows a guest user to crash the QEMU process, resulting in a denial of service, or the potential execution of arbitrary code with the privileges of the QEMU process on the host.

CVSS 3.1 · 5.0 Medium EPSS 5.4% KEV · Not listed
Vendors
Canonical Debian Fedoraproject and 3 more
Products
Ubuntu Linux Debian Linux Fedora and 11 more
CVE-2020-13800

QEMU: ati-vga: infinite recursion in ati_mm_read/write calls may lead to DoS

ati-vga in hw/display/ati.c in QEMU 4.2.0 allows guest OS users to trigger infinite recursion via a crafted mm_index value during an ati_mm_read or ati_mm_write call.

CVSS 3.1 · 6.0 Medium EPSS < 1% KEV · Not listed
Vendors
Canonical Opensuse Qemu
Products
Ubuntu Linux Leap Qemu
CVE-2020-13791

QEMU: ati-vga: OOB access while reading PCI configuration may lead to DoS

hw/pci/pci.c in QEMU 4.2.0 allows guest OS users to trigger an out-of-bounds access by providing an address near the end of the PCI configuration space.

CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed
Vendors
Qemu
Products
Qemu
CVE-2020-13765

QEMU: loader: OOB access while loading registered ROM may lead to code execution

rom_copy() in hw/core/loader.c in QEMU 4.0 and 4.1.0 does not validate the relationship between two addresses, which allows attackers to trigger an invalid memory copy operation.

CVSS 3.1 · 5.6 Medium EPSS 2.5% KEV · Not listed
Vendors
Canonical Debian Qemu and 1 more
Products
Ubuntu Linux Debian Linux Qemu and 1 more
CVE-2020-13754

QEMU: msix: OOB access during mmio operations may lead to DoS

hw/pci/msix.c in QEMU 4.2.0 allows guest OS users to trigger an out-of-bounds access via a crafted address in an msi-x mmio operation.

CVSS 3.1 · 6.7 Medium EPSS < 1% KEV · Not listed
Vendors
Canonical Debian Qemu and 1 more
Products
Ubuntu Linux Debian Linux Qemu and 2 more
CVE-2020-13659

QEMU: exec: address_space_map returns NULL without setting length to zero may lead to DoS

address_space_map in exec.c in QEMU 4.2.0 can trigger a NULL pointer dereference related to BounceBuffer.

CVSS 3.1 · 2.5 Low EPSS < 1% KEV · Not listed
Vendors
Canonical Debian Opensuse and 1 more
Products
Ubuntu Linux Debian Linux Leap and 1 more
CVE-2020-13362

QEMU: megasas: OOB read access due to invalid index leads to DoS

In QEMU 5.0.0 and earlier, megasas_lookup_frame in hw/scsi/megasas.c has an out-of-bounds read via a crafted reply_queue_head field from a guest OS user.

CVSS 3.1 · 3.2 Low EPSS < 1% KEV · Not listed
Vendors
Canonical Debian Opensuse and 1 more
Products
Ubuntu Linux Debian Linux Leap and 1 more
CVE-2020-13361

QEMU: es1370: OOB access due to incorrect frame count leads to DoS

In QEMU 5.0.0 and earlier, es1370_transfer_audio in hw/audio/es1370.c does not properly validate the frame count, which allows guest OS users to trigger an out-of-bounds access during an es1370_write() operation.

CVSS 3.1 · 3.9 Low EPSS < 1% KEV · Not listed
Vendors
Canonical Debian Opensuse and 1 more
Products
Ubuntu Linux Debian Linux Leap and 1 more
CVE-2020-13253

QEMU: sd: OOB access could crash the guest resulting in DoS

sd_wp_addr in hw/sd/sd.c in QEMU 4.2.0 uses an unvalidated address, which leads to an out-of-bounds read during sdhci_write() operations. A guest OS user can crash the QEMU process.

CVSS 3.1 · 5.5 Medium EPSS < 1% KEV · Not listed
Vendors
Canonical Debian Qemu
Products
Ubuntu Linux Debian Linux Qemu
CVE-2020-12829

qemu: OOB read and write due to integer overflow in sm501_2d_operation() in hw/display/sm501.c

In QEMU through 5.0.0, an integer overflow was found in the SM501 display driver implementation. This flaw occurs in the COPY_AREA macro while handling MMIO write operations through the sm501_2d_engine_write() callback. A local attacker could abuse this flaw to crash the QEMU process in sm501_2d_operation() in hw/display/sm501.c on the host, resulting in a denial of service.

CVSS 3.1 · 3.8 Low EPSS < 1% KEV · Not listed
Vendors
Canonical Debian Qemu
Products
Ubuntu Linux Debian Linux Qemu
CVE-2020-11947

QEMU: heap buffer overflow in iscsi_aio_ioctl_cb() in block/iscsi.c may lead to information disclosure

iscsi_aio_ioctl_cb in block/iscsi.c in QEMU 4.1.0 has a heap-based buffer over-read that may disclose unrelated information from process memory to an attacker.

CVSS 3.1 · 3.8 Low EPSS < 1% KEV · Not listed
Vendors
Qemu Redhat
Products
Qemu Advanced Virtualization Enterprise Linux
CVE-2020-11869

qemu: integer overflow in ati_2d_blt() in hw/display/ati-2d.c could lead to DoS

An integer overflow was found in QEMU 4.0.1 through 4.2.0 in the way it implemented ATI VGA emulation. This flaw occurs in the ati_2d_blt() routine in hw/display/ati-2d.c while handling MMIO write operations through the ati_mm_write() callback. A malicious guest could abuse this flaw to crash the QEMU process, resulting in a denial of service.

CVSS 3.1 · 3.3 Low EPSS < 1% KEV · Not listed
Vendors
Qemu
Products
Qemu
CVE-2020-11102

QEMU: tulip: OOB access in tulip_copy_tx_buffers

hw/net/tulip.c in QEMU 4.2.0 has a buffer overflow during the copying of tx/rx buffers because the frame size is not validated against the r/w data length.

CVSS 3.1 · 5.6 Medium EPSS 2.0% KEV · Not listed
Vendors
Qemu
Products
Qemu
CVE-2020-10761

QEMU: nbd: reachable assertion failure in nbd_negotiate_send_rep_verr via remote client

An assertion failure issue was found in the Network Block Device(NBD) Server in all QEMU versions before QEMU 5.0.1. This flaw occurs when an nbd-client sends a spec-compliant request that is near the boundary of maximum permitted request length. A remote nbd-client could use this flaw to crash the qemu-nbd server resulting in a denial of service.

CVSS 3.1 · 5 Medium EPSS 1.8% KEV · Not listed
Vendors
Canonical Opensuse Qemu and 1 more
Products
Ubuntu Linux Leap Qemu and 2 more
CVE-2020-10717

QEMU: virtiofsd: guest may open maximum file descriptor to cause DoS

A potential DoS flaw was found in the virtio-fs shared file system daemon (virtiofsd) implementation of the QEMU version >= v5.0. Virtio-fs is meant to share a host file system directory with a guest via virtio-fs device. If the guest opens the maximum number of file descriptors under the shared directory, a denial of service may occur. This flaw allows a guest user/process to cause this denial of service on the host.

CVSS 3.1 · 3.3 Low EPSS < 1% KEV · Not listed
Vendors
Qemu Redhat
Products
Qemu Advanced Virtualization