# CVE-2018-16872: qemu: A flaw was found in qemu Media Transfer Protocol (MTP) CVE-2018-16872 is fixed in 17 products on 1 platform, first by qemu 1:2.11+dfsg-1ubuntu7.12, released February 18, 2019. It is not reported as exploited. Patch Radar priority: Routine. - Web page: https://patchblox.com/security/cve/CVE-2018-16872 - Priority: Routine - CVSS: n/a (Low) - EPSS: 0.0108 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Dec 12, 2018 ## Description A flaw was found in qemu Media Transfer Protocol (MTP). The code opening files in usb_mtp_get_object and usb_mtp_get_partial_object and directories in usb_mtp_object_readdir doesn't consider that the underlying filesystem may have changed since the time lstat(2) was called in usb_mtp_object_alloc, a classical TOCTTOU problem. An attacker with write access to the host filesystem shared with a guest can use this property to navigate the host filesystem in the context of the QEMU process and read any file the QEMU process has access to. Access to the filesystem may be local or via a network share protocol such as CIFS. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | qemu Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.12 | [qemu 1:2.11+dfsg-1ubuntu7.12](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-qemu-1-2.11-dfsg-1ubuntu7.12.md) | Feb 18, 2019 | | Linux | qemu-block-extra Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.12 | [qemu-block-extra 1:2.11+dfsg-1ubuntu7.12](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-qemu-block-extra-1-2.11-dfsg-1ubuntu7.12.md) | Feb 18, 2019 | | Linux | qemu-guest-agent Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.12 | [qemu-guest-agent 1:2.11+dfsg-1ubuntu7.12](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-qemu-guest-agent-1-2.11-dfsg-1ubuntu7.12.md) | Feb 18, 2019 | | Linux | qemu-kvm Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.12 | [qemu-kvm 1:2.11+dfsg-1ubuntu7.12](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-qemu-kvm-1-2.11-dfsg-1ubuntu7.12.md) | Feb 18, 2019 | | Linux | qemu-system Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.12 | [qemu-system 1:2.11+dfsg-1ubuntu7.12](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-qemu-system-1-2.11-dfsg-1ubuntu7.12.md) | Feb 18, 2019 | | Linux | qemu-system-arm Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.12 | [qemu-system-arm 1:2.11+dfsg-1ubuntu7.12](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-qemu-system-arm-1-2.11-dfsg-1ubuntu7.12.md) | Feb 18, 2019 | | Linux | qemu-system-common Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.12 | [qemu-system-common 1:2.11+dfsg-1ubuntu7.12](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-qemu-system-common-1-2.11-dfsg-1ubuntu7.12.md) | Feb 18, 2019 | | Linux | qemu-system-mips Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.12 | [qemu-system-mips 1:2.11+dfsg-1ubuntu7.12](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-qemu-system-mips-1-2.11-dfsg-1ubuntu7.12.md) | Feb 18, 2019 | | Linux | qemu-system-misc Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.12 | [qemu-system-misc 1:2.11+dfsg-1ubuntu7.12](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-qemu-system-misc-1-2.11-dfsg-1ubuntu7.12.md) | Feb 18, 2019 | | Linux | qemu-system-ppc Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.12 | [qemu-system-ppc 1:2.11+dfsg-1ubuntu7.12](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-qemu-system-ppc-1-2.11-dfsg-1ubuntu7.12.md) | Feb 18, 2019 | | Linux | qemu-system-s390x Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.12 | [qemu-system-s390x 1:2.11+dfsg-1ubuntu7.12](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-qemu-system-s390x-1-2.11-dfsg-1ubuntu7.12.md) | Feb 18, 2019 | | Linux | qemu-system-sparc Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.12 | [qemu-system-sparc 1:2.11+dfsg-1ubuntu7.12](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-qemu-system-sparc-1-2.11-dfsg-1ubuntu7.12.md) | Feb 18, 2019 | | Linux | qemu-system-x86 Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.12 | [qemu-system-x86 1:2.11+dfsg-1ubuntu7.12](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-qemu-system-x86-1-2.11-dfsg-1ubuntu7.12.md) | Feb 18, 2019 | | Linux | qemu-user Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.12 | [qemu-user 1:2.11+dfsg-1ubuntu7.12](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-qemu-user-1-2.11-dfsg-1ubuntu7.12.md) | Feb 18, 2019 | | Linux | qemu-user-binfmt Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.12 | [qemu-user-binfmt 1:2.11+dfsg-1ubuntu7.12](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-qemu-user-binfmt-1-2.11-dfsg-1ubuntu7.12.md) | Feb 18, 2019 | | Linux | qemu-user-static Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.12 | [qemu-user-static 1:2.11+dfsg-1ubuntu7.12](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-qemu-user-static-1-2.11-dfsg-1ubuntu7.12.md) | Feb 18, 2019 | | Linux | qemu-utils Ubuntu 18.04.6 LTS (bionic) | 1:2.11+dfsg-1ubuntu7.12 | [qemu-utils 1:2.11+dfsg-1ubuntu7.12](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-qemu-utils-1-2.11-dfsg-1ubuntu7.12.md) | Feb 18, 2019 | --- Data as of 2026-11-07T18:46:35Z UTC. 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