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Qemu : Security Vulnerabilities

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# CVE ID CWE ID # of Exploits Vulnerability Type(s) Publish Date Update Date Score Gained Access Level Access Complexity Authentication Conf. Integ. Avail.
1 CVE-2022-26354 772 2022-03-16 2022-05-12
2.1
None Local Low Not required None None Partial
A flaw was found in the vhost-vsock device of QEMU. In case of error, an invalid element was not detached from the virtqueue before freeing its memory, leading to memory leakage and other unexpected results. Affected QEMU versions <= 6.2.0.
2 CVE-2022-26353 772 2022-03-16 2022-05-10
5.0
None Remote Low Not required None None Partial
A flaw was found in the virtio-net device of QEMU. This flaw was inadvertently introduced with the fix for CVE-2021-3748, which forgot to unmap the cached virtqueue elements on error, leading to memory leakage and other unexpected results. Affected QEMU version: 6.2.0.
3 CVE-2022-1050 416 Exec Code 2022-03-29 2022-04-29
4.6
None Local Low Not required Partial Partial Partial
A flaw was found in the QEMU implementation of VMWare's paravirtual RDMA device. This flaw allows a crafted guest driver to execute HW commands when shared buffers are not yet allocated, potentially leading to a use-after-free condition.
4 CVE-2021-20295 125 2022-04-01 2022-04-08
2.1
None Local Low Not required Partial None None
It was discovered that the update for the virt:rhel module in the RHSA-2020:4676 (https://access.redhat.com/errata/RHSA-2020:4676) erratum released as part of Red Hat Enterprise Linux 8.3 failed to include the fix for the qemu-kvm component issue CVE-2020-10756, which was previously corrected in virt:rhel/qemu-kvm via erratum RHSA-2020:4059 (https://access.redhat.com/errata/RHSA-2020:4059). CVE-2021-20295 was assigned to that Red Hat specific security regression. For more details about the original security issue CVE-2020-10756, refer to bug 1835986 or the CVE page: https://access.redhat.com/security/cve/CVE-2020-10756.
5 CVE-2021-20263 281 2021-03-09 2022-01-01
2.1
None Local Low Not required None Partial None
A flaw was found in the virtio-fs shared file system daemon (virtiofsd) of QEMU. The new 'xattrmap' option may cause the 'security.capability' xattr in the guest to not drop on file write, potentially leading to a modified, privileged executable in the guest. In rare circumstances, this flaw could be used by a malicious user to elevate their privileges within the guest.
6 CVE-2021-20257 835 DoS 2022-03-16 2022-05-12
2.1
None Local Low Not required None None Partial
An infinite loop flaw was found in the e1000 NIC emulator of the QEMU. This issue occurs while processing transmits (tx) descriptors in process_tx_desc if various descriptor fields are initialized with invalid values. This flaw allows a guest to consume CPU cycles on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.
7 CVE-2021-20255 835 DoS Overflow 2021-03-09 2021-04-11
2.1
None Local Low Not required None None Partial
A stack overflow via an infinite recursion vulnerability was found in the eepro100 i8255x device emulator of QEMU. This issue occurs while processing controller commands due to a DMA reentry issue. This flaw allows a guest user or process to consume CPU cycles or crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.
8 CVE-2021-20221 787 2021-05-13 2021-12-10
2.1
None Local Low Not required None None Partial
An out-of-bounds heap buffer access issue was found in the ARM Generic Interrupt Controller emulator of QEMU up to and including qemu 4.2.0on aarch64 platform. The issue occurs because while writing an interrupt ID to the controller memory area, it is not masked to be 4 bits wide. It may lead to the said issue while updating controller state fields and their subsequent processing. A privileged guest user may use this flaw to crash the QEMU process on the host resulting in DoS scenario.
9 CVE-2021-20203 190 Overflow 2021-02-25 2021-04-11
2.1
None Local Low Not required None None Partial
An integer overflow issue was found in the vmxnet3 NIC emulator of the QEMU for versions up to v5.2.0. It may occur if a guest was to supply invalid values for rx/tx queue size or other NIC parameters. A privileged guest user may use this flaw to crash the QEMU process on the host resulting in DoS scenario.
10 CVE-2021-20196 476 DoS 2021-05-26 2022-04-26
2.1
None Local Low Not required None None Partial
A NULL pointer dereference flaw was found in the floppy disk emulator of QEMU. This issue occurs while processing read/write ioport commands if the selected floppy drive is not initialized with a block device. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.
11 CVE-2021-20181 416 2021-05-13 2022-04-26
6.9
None Local Medium Not required Complete Complete Complete
A race condition flaw was found in the 9pfs server implementation of QEMU up to and including 5.2.0. This flaw allows a malicious 9p client to cause a use-after-free error, potentially escalating their privileges on the system. The highest threat from this vulnerability is to confidentiality, integrity as well as system availability.
12 CVE-2021-4207 362 Exec Code Overflow 2022-04-29 2022-05-10
4.6
None Local Low Not required Partial Partial Partial
A flaw was found in the QXL display device emulation in QEMU. A double fetch of guest controlled values `cursor->header.width` and `cursor->header.height` can lead to the allocation of a small cursor object followed by a subsequent heap-based buffer overflow. A malicious privileged guest user could use this flaw to crash the QEMU process on the host or potentially execute arbitrary code within the context of the QEMU process.
13 CVE-2021-4206 190 Exec Code Overflow 2022-04-29 2022-05-10
4.6
None Local Low Not required Partial Partial Partial
A flaw was found in the QXL display device emulation in QEMU. An integer overflow in the cursor_alloc() function can lead to the allocation of a small cursor object followed by a subsequent heap-based buffer overflow. This flaw allows a malicious privileged guest user to crash the QEMU process on the host or potentially execute arbitrary code within the context of the QEMU process.
14 CVE-2021-4145 476 2022-01-25 2022-03-15
4.9
None Local Low Not required None None Complete
A NULL pointer dereference issue was found in the block mirror layer of QEMU in versions prior to 6.2.0. The `self` pointer is dereferenced in mirror_wait_on_conflicts() without ensuring that it's not NULL. A malicious unprivileged user within the guest could use this flaw to crash the QEMU process on the host when writing data reaches the threshold of mirroring node.
15 CVE-2021-3947 125 Overflow 2022-02-18 2022-05-11
2.1
None Local Low Not required Partial None None
A stack-buffer-overflow was found in QEMU in the NVME component. The flaw lies in nvme_changed_nslist() where a malicious guest controlling certain input can read out of bounds memory. A malicious user could use this flaw leading to disclosure of sensitive information.
16 CVE-2021-3930 193 DoS 2022-02-18 2022-05-13
2.1
None Local Low Not required None None Partial
An off-by-one error was found in the SCSI device emulation in QEMU. It could occur while processing MODE SELECT commands in mode_sense_page() if the 'page' argument was set to MODE_PAGE_ALLS (0x3f). A malicious guest could use this flaw to potentially crash QEMU, resulting in a denial of service condition.
17 CVE-2021-3750 416 DoS Exec Code 2022-05-02 2022-05-16
4.6
None Local Low Not required Partial Partial Partial
A DMA reentrancy issue was found in the USB EHCI controller emulation of QEMU. EHCI does not verify if the Buffer Pointer overlaps with its MMIO region when it transfers the USB packets. Crafted content may be written to the controller's registers and trigger undesirable actions (such as reset) while the device is still transferring packets. This can ultimately lead to a use-after-free issue. A malicious guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service condition, or potentially execute arbitrary code within the context of the QEMU process on the host. This flaw affects QEMU versions before 7.0.0.
18 CVE-2021-3748 416 DoS Exec Code 2022-03-23 2022-05-13
7.2
None Local Low Not required Complete Complete Complete
A use-after-free vulnerability was found in the virtio-net device of QEMU. It could occur when the descriptor's address belongs to the non direct access region, due to num_buffers being set after the virtqueue elem has been unmapped. A malicious guest could use this flaw to crash QEMU, resulting in a denial of service condition, or potentially execute code on the host with the privileges of the QEMU process.
19 CVE-2021-3713 787 Exec Code 2021-08-25 2021-10-18
4.6
None Local Low Not required Partial Partial Partial
An out-of-bounds write flaw was found in the UAS (USB Attached SCSI) device emulation of QEMU in versions prior to 6.2.0-rc0. The device uses the guest supplied stream number unchecked, which can lead to out-of-bounds access to the UASDevice->data3 and UASDevice->status3 fields. A malicious guest user could use this flaw to crash QEMU or potentially achieve code execution with the privileges of the QEMU process on the host.
20 CVE-2021-3682 763 Exec Code 2021-08-05 2021-10-18
6.0
None Remote Medium ??? Partial Partial Partial
A flaw was found in the USB redirector device emulation of QEMU in versions prior to 6.1.0-rc2. It occurs when dropping packets during a bulk transfer from a SPICE client due to the packet queue being full. A malicious SPICE client could use this flaw to make QEMU call free() with faked heap chunk metadata, resulting in a crash of QEMU or potential code execution with the privileges of the QEMU process on the host.
21 CVE-2021-3638 787 DoS 2022-03-03 2022-04-08
2.1
None Local Low Not required None None Partial
An out-of-bounds memory access flaw was found in the ATI VGA device emulation of QEMU. This flaw occurs in the ati_2d_blt() routine while handling MMIO write operations when the guest provides invalid values for the destination display parameters. A malicious guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service.
22 CVE-2021-3608 824 2022-02-24 2022-05-10
4.9
None Local Low Not required None None Complete
A flaw was found in the QEMU implementation of VMWare's paravirtual RDMA device in versions prior to 6.1.0. The issue occurs while handling a "PVRDMA_REG_DSRHIGH" write from the guest and may result in a crash of QEMU or cause undefined behavior due to the access of an uninitialized pointer. The highest threat from this vulnerability is to system availability.
23 CVE-2021-3607 190 DoS Overflow 2022-02-24 2022-05-10
4.9
None Local Low Not required None None Complete
An integer overflow was found in the QEMU implementation of VMWare's paravirtual RDMA device in versions prior to 6.1.0. The issue occurs while handling a "PVRDMA_REG_DSRHIGH" write from the guest due to improper input validation. This flaw allows a privileged guest user to make QEMU allocate a large amount of memory, resulting in a denial of service. The highest threat from this vulnerability is to system availability.
24 CVE-2021-3582 119 Overflow 2022-03-25 2022-04-29
2.1
None Local Low Not required None None Partial
A flaw was found in the QEMU implementation of VMWare's paravirtual RDMA device. The issue occurs while handling a "PVRDMA_CMD_CREATE_MR" command due to improper memory remapping (mremap). This flaw allows a malicious guest to crash the QEMU process on the host. The highest threat from this vulnerability is to system availability.
25 CVE-2021-3546 787 DoS Exec Code 2021-06-02 2021-11-06
4.6
None Local Low Not required Partial Partial Partial
An out-of-bounds write vulnerability was found in the virtio vhost-user GPU device (vhost-user-gpu) of QEMU in versions up to and including 6.0. The flaw occurs while processing the 'VIRTIO_GPU_CMD_GET_CAPSET' command from the guest. It could allow a privileged guest user to crash the QEMU process on the host, resulting in a denial of service condition, or potential code execution with the privileges of the QEMU process.
26 CVE-2021-3545 200 +Info 2021-06-02 2021-10-18
2.1
None Local Low Not required Partial None None
An information disclosure vulnerability was found in the virtio vhost-user GPU device (vhost-user-gpu) of QEMU in versions up to and including 6.0. The flaw exists in virgl_cmd_get_capset_info() in contrib/vhost-user-gpu/virgl.c and could occur due to the read of uninitialized memory. A malicious guest could exploit this issue to leak memory from the host.
27 CVE-2021-3544 401 2021-06-02 2021-10-18
2.1
None Local Low Not required None None Partial
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.
28 CVE-2021-3527 770 DoS 2021-05-26 2021-11-15
2.1
None Local Low Not required None None Partial
A flaw was found in the USB redirector device (usb-redir) of QEMU. Small USB packets are combined into a single, large transfer request, to reduce the overhead and improve performance. The combined size of the bulk transfer is used to dynamically allocate a variable length array (VLA) on the stack without proper validation. Since the total size is not bounded, a malicious guest could use this flaw to influence the array length and cause the QEMU process to perform an excessive allocation on the stack, resulting in a denial of service.
29 CVE-2021-3507 119 Overflow +Info 2021-05-06 2021-06-01
3.6
None Local Low Not required Partial None Partial
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.
30 CVE-2021-3416 835 Overflow Bypass 2021-03-18 2022-01-04
2.1
None Local Low Not required None None Partial
A potential stack overflow via infinite loop issue was found in various NIC emulators of QEMU in versions up to and including 5.2.0. The issue occurs in loopback mode of a NIC wherein reentrant DMA checks get bypassed. A guest user/process may use this flaw to consume CPU cycles or crash the QEMU process on the host resulting in DoS scenario.
31 CVE-2021-3409 119 DoS Exec Code Overflow 2021-03-23 2022-04-26
4.6
None Local Low Not required Partial Partial Partial
The patch for CVE-2020-17380/CVE-2020-25085 was found to be ineffective, thus making QEMU vulnerable to the out-of-bounds read/write access issues previously found in the SDHCI controller emulation code. This flaw allows a malicious privileged guest to crash the QEMU process on the host, resulting in a denial of service or potential code execution. QEMU up to (including) 5.2.0 is affected by this.
32 CVE-2021-3392 416 DoS 2021-03-23 2022-04-26
2.1
None Local Low Not required None None Partial
A use-after-free flaw was found in the MegaRAID emulator of QEMU. This issue occurs while processing SCSI I/O requests in the case of an error mptsas_free_request() that does not dequeue the request object 'req' from a pending requests queue. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. Versions between 2.10.0 and 5.2.0 are potentially affected.
33 CVE-2020-35517 269 2021-01-28 2021-07-08
4.6
None Local Low Not required Partial Partial Partial
A flaw was found in qemu. A host privilege escalation issue was found in the virtio-fs shared file system daemon where a privileged guest user is able to create a device special file in the shared directory and use it to r/w access host devices.
34 CVE-2020-35506 416 DoS Exec Code 2021-05-28 2021-07-13
4.6
None Local Low Not required Partial Partial Partial
A use-after-free vulnerability was found in the am53c974 SCSI host bus adapter emulation of QEMU in versions before 6.0.0 during the handling of the 'Information Transfer' command (CMD_TI). This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service or potential code execution with the privileges of the QEMU process.
35 CVE-2020-35505 476 DoS 2021-05-28 2022-05-13
2.1
None Local Low Not required None None Partial
A NULL pointer dereference flaw was found in the am53c974 SCSI host bus adapter emulation of QEMU in versions before 6.0.0. This issue occurs while handling the 'Information Transfer' command. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.
36 CVE-2020-35504 476 DoS 2021-05-28 2022-05-13
2.1
None Local Low Not required None None Partial
A NULL pointer dereference flaw was found in the SCSI emulation support of QEMU in versions before 6.0.0. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.
37 CVE-2020-35503 476 DoS 2021-06-02 2022-05-13
2.1
None Local Low Not required None None Partial
A NULL pointer dereference flaw was found in the megasas-gen2 SCSI host bus adapter emulation of QEMU in versions before and including 6.0. This issue occurs in the megasas_command_cancelled() callback function while dropping a SCSI request. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.
38 CVE-2020-29443 125 2021-01-26 2021-03-15
3.3
None Local Medium Not required Partial None Partial
ide_atapi_cmd_reply_end in hw/ide/atapi.c in QEMU 5.1.0 allows out-of-bounds read access because a buffer index is not validated.
39 CVE-2020-28916 835 2020-12-04 2021-02-24
2.1
None Local Low Not required None None Partial
hw/net/e1000e_core.c in QEMU 5.0.0 has an infinite loop via an RX descriptor with a NULL buffer address.
40 CVE-2020-27821 787 DoS 2020-12-08 2021-01-15
2.1
None Local Low Not required None None Partial
A flaw was found in the memory management API of QEMU during the initialization of a memory region cache. This issue could lead to an out-of-bounds write access to the MSI-X table while performing MMIO operations. A guest user may abuse this flaw to crash the QEMU process on the host, resulting in a denial of service. This flaw affects QEMU versions prior to 5.2.0.
41 CVE-2020-27661 369 DoS 2021-06-02 2022-05-13
2.1
None Local Low Not required None None Partial
A divide-by-zero issue was found in dwc2_handle_packet in hw/usb/hcd-dwc2.c in the hcd-dwc2 USB host controller emulation of QEMU. A malicious guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service.
42 CVE-2020-27617 617 2020-11-06 2022-01-06
4.0
None Remote Low ??? None None Partial
eth_get_gso_type in net/eth.c in QEMU 4.2.1 allows guest OS users to trigger an assertion failure. A guest can crash the QEMU process via packet data that lacks a valid Layer 3 protocol.
43 CVE-2020-27616 682 2020-11-06 2022-01-01
4.0
None Remote Low ??? None None Partial
ati_2d_blt in hw/display/ati_2d.c in QEMU 4.2.1 can encounter an outside-limits situation in a calculation. A guest can crash the QEMU process.
44 CVE-2020-25743 476 2020-10-06 2020-10-07
2.1
None Local Low Not required None None Partial
hw/ide/pci.c in QEMU before 5.1.1 can trigger a NULL pointer dereference because it lacks a pointer check before an ide_cancel_dma_sync call.
45 CVE-2020-25742 476 2020-10-06 2020-10-07
2.1
None Local Low Not required None None Partial
pci_change_irq_level in hw/pci/pci.c in QEMU before 5.1.1 has a NULL pointer dereference because pci_get_bus() might not return a valid pointer.
46 CVE-2020-25741 476 2020-10-02 2020-10-14
2.1
None Local Low Not required None None Partial
fdctrl_write_data in hw/block/fdc.c in QEMU 5.0.0 has a NULL pointer dereference via a NULL block pointer for the current drive.
47 CVE-2020-25723 617 DoS 2020-12-02 2020-12-28
2.1
None Local Low Not required None None Partial
A reachable assertion issue was found in the USB EHCI emulation code of QEMU. It could occur while processing USB requests due to missing handling of DMA memory map failure. A malicious privileged user within the guest may abuse this flaw to send bogus USB requests and crash the QEMU process on the host, resulting in a denial of service.
48 CVE-2020-25625 835 2020-09-25 2022-01-01
4.7
None Local Medium Not required None None Complete
hw/usb/hcd-ohci.c in QEMU 5.0.0 has an infinite loop when a TD list has a loop.
49 CVE-2020-25624 125 2020-11-30 2020-12-10
4.4
None Local Medium Not required Partial Partial Partial
hw/usb/hcd-ohci.c in QEMU 5.0.0 has a stack-based buffer over-read via values obtained from the host controller driver.
50 CVE-2020-25085 787 Overflow 2020-09-25 2021-03-15
4.4
None Local Medium Not required Partial Partial Partial
QEMU 5.0.0 has a heap-based Buffer Overflow in flatview_read_continue in exec.c because hw/sd/sdhci.c mishandles a write operation in the SDHC_BLKSIZE case.
Total number of vulnerabilities : 368   Page : 1 (This Page)2 3 4 5 6 7 8
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