# qemu-user 1:4.2-3ubuntu6.4: qemu-user 1:4.2-3ubuntu6.4 for Ubuntu 20.04 LTS (focal)

qemu-user 1:4.2-3ubuntu6.4, released August 11, 2020, fixes 11 CVEs in qemu-user. None of them is reported as exploited. Patch Radar priority: Routine. The product is no longer supported.

- Web page: https://patchblox.com/security/fix/linux/ubuntu-focal-qemu-user-1-4.2-3ubuntu6.4
- Platform: Linux
- Released: Aug 11, 2020
- Priority: Routine (Closes 11 CVEs, none high severity)
- CVEs: 11, exploited: 0, on CISA KEV: 0

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [qemu-user](https://patchblox.com/security/data/product/linux/qemu-user.md) | Ubuntu 20.04 LTS (focal) | 1:4.2-3ubuntu6.4 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2020-10761](https://patchblox.com/security/data/cve/CVE-2020-10761.md) | Routine | qemu: An assertion failure issue was found in the Network Block Device(NBD) Server in all QEMU versions before QEMU 5.0.1 | n/a | 0.0180 |  |
| [CVE-2020-13800](https://patchblox.com/security/data/cve/CVE-2020-13800.md) | Routine | qemu: 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... | n/a | 0.0049 |  |
| [CVE-2020-15863](https://patchblox.com/security/data/cve/CVE-2020-15863.md) | Routine | qemu: hw/net/xgmac.c in the XGMAC Ethernet controller in QEMU before 07-20-2020 has a buffer overflow | n/a | 0.0048 |  |
| [CVE-2020-14415](https://patchblox.com/security/data/cve/CVE-2020-14415.md) | Routine | qemu-utils: oss_write in audio/ossaudio.c in QEMU before 5.0.0 mishandles a buffer position. | n/a | 0.0045 |  |
| [CVE-2020-13659](https://patchblox.com/security/data/cve/CVE-2020-13659.md) | Routine | qemu-system-common: address_space_map in exec.c in QEMU 4.2.0 can trigger a NULL pointer dereference related to BounceBuffer. | n/a | 0.0043 |  |
| [CVE-2020-13253](https://patchblox.com/security/data/cve/CVE-2020-13253.md) | Routine | qemu-block-extra: 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... | n/a | 0.0043 |  |
| [CVE-2020-13754](https://patchblox.com/security/data/cve/CVE-2020-13754.md) | Routine | libguestfs-java: QEMU: msix: OOB access during mmio operations may lead to DoS | 6.7 | 0.0042 |  |
| [CVE-2020-16092](https://patchblox.com/security/data/cve/CVE-2020-16092.md) | Routine | hivex: virt:rhel/qemu-kvm: QEMU: reachable assertion failure in net_tx_pkt_add_raw_fragment() in hw/net/net_tx_pkt.c [rhel-8]) | 3.8 | 0.0038 |  |
| [CVE-2020-13362](https://patchblox.com/security/data/cve/CVE-2020-13362.md) | Routine | qemu: 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_qu... | n/a | 0.0038 |  |
| [CVE-2020-12829](https://patchblox.com/security/data/cve/CVE-2020-12829.md) | Routine | qemu-block-extra: In QEMU through 5.0.0, an integer overflow was found in the SM501 display driver implementation | n/a | 0.0037 |  |
| [CVE-2020-13361](https://patchblox.com/security/data/cve/CVE-2020-13361.md) | Routine | qemu: In QEMU 5.0.0 and earlier, es1370_transfer_audio in hw/audio/es1370.c does not properly validate the frame count, whi... | n/a | 0.0037 |  |

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Data as of 2026-11-13T14:02:24Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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