{"id":"CVE-2020-14394","aliases":["BELL-CVE-2020-14394","DEBIAN-CVE-2020-14394","DLA-3362-1","EUVD-2020-6533","GHSA-9gg5-9c3q-7g76","OESA-2022-1918","SUSE-SU-2023:0761-1","SUSE-SU-2023:0840-1","SUSE-SU-2023:0879-1","SUSE-SU-2023:0879-2","UBUNTU-CVE-2020-14394","USN-6567-1"],"status":"published","title":"An infinite loop flaw was found in the USB xHCI controller emulation of QEMU while computing the...","description":"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.","severity":{"version":"3.1","score":3.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L","level":"low","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-12","score":0.0039,"percentile":0.33586,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-835"],"published":"2022-08-17T00:00:00Z","modified":"2026-10-26T12:01:36Z","fixes":[{"ecosystem":"Debian:12","package":"qemu","fixed_in":["1:7.1+dfsg-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"qemu","fixed_in":["1:7.1+dfsg-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"qemu","fixed_in":["1:7.1+dfsg-1"],"sources":["osv"]},{"ecosystem":"openEuler:20.03-LTS-SP1","package":"qemu","fixed_in":["4.1.0-70.oe1"],"sources":["osv"]},{"ecosystem":"openEuler:20.03-LTS-SP3","package":"qemu","fixed_in":["4.1.0-74.oe1"],"sources":["osv"]},{"ecosystem":"openEuler:22.03-LTS","package":"qemu","fixed_in":["6.2.0-49.oe2203"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:14.04:LTS","package":"qemu","fixed_in":["2.0.0+dfsg-2ubuntu1.47+esm6"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:16.04:LTS","package":"qemu","fixed_in":["1:2.5+dfsg-5ubuntu10.51+esm4"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:18.04:LTS","package":"qemu","fixed_in":["1:2.11+dfsg-1ubuntu7.42+esm5"],"sources":["osv"]},{"ecosystem":"Ubuntu:20.04:LTS","package":"qemu","fixed_in":["1:4.2-3ubuntu6.28"],"sources":["osv"]},{"ecosystem":"Ubuntu:22.04:LTS","package":"qemu","fixed_in":["1:6.2+dfsg-2ubuntu6.16"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"qemu","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:7.1+dfsg-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"qemu","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:7.1+dfsg-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"qemu","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:7.1+dfsg-1"}]}]},{"source":"osv","ecosystem":"Debian:10","package":"qemu","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:3.1+dfsg-8+deb10u10"}]}],"versions":["1:3.1+dfsg-8","1:3.1+dfsg-8+deb10u2","1:3.1+dfsg-8+deb10u3","1:3.1+dfsg-8+deb10u4","1:3.1+dfsg-8+deb10u5","1:3.1+dfsg-8+deb10u6","1:3.1+dfsg-8+deb10u7","1:3.1+dfsg-8+deb10u8","1:3.1+dfsg-8+deb10u9","1:3.1+dfsg-8~deb10u1"],"bundled":10},{"source":"osv","ecosystem":"openEuler:20.03-LTS-SP1","package":"qemu","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.0-70.oe1"}]}]},{"source":"osv","ecosystem":"openEuler:20.03-LTS-SP3","package":"qemu","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.0-74.oe1"}]}]},{"source":"osv","ecosystem":"openEuler:22.03-LTS","package":"qemu","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.2.0-49.oe2203"}]}]},{"source":"osv","ecosystem":"SUSE:Linux 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Tracking","Third Party Advisory","report"]},{"url":"https://gitlab.com/qemu-project/qemu/-/issues/646","tags":["x_transferred","Exploit","Issue Tracking","Patch","Third Party Advisory","fix"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I7J5IRXJYLELW7D43A75LOWRUE5EU54O/","tags":["vendor-advisory","x_transferred","web"]},{"url":"https://lists.debian.org/debian-lts-announce/2023/03/msg00013.html","tags":["mailing-list","x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-14394","tags":["advisory"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/I7J5IRXJYLELW7D43A75LOWRUE5EU54O/"},{"url":"https://github.com/advisories/GHSA-9gg5-9c3q-7g76"},{"url":"https://docs.bell-sw.com/security/cves/CVE-2020-14394","tags":["advisory"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2020-14394","tags":["advisory"]},{"url":"https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2022-1918","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2023/suse-su-20230761-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1172033","tags":["report"]},{"url":"https://bugzilla.suse.com/1172382","tags":["report"]},{"url":"https://bugzilla.suse.com/1175144","tags":["report"]},{"url":"https://bugzilla.suse.com/1180207","tags":["report"]},{"url":"https://bugzilla.suse.com/1182282","tags":["report"]},{"url":"https://bugzilla.suse.com/1185000","tags":["report"]},{"url":"https://bugzilla.suse.com/1193880","tags":["report"]},{"url":"https://bugzilla.suse.com/1197653","tags":["report"]},{"url":"https://bugzilla.suse.com/1198035","tags":["report"]},{"url":"https://bugzilla.suse.com/1198038","tags":["report"]},{"url":"https://bugzilla.suse.com/1198712","tags":["report"]},{"url":"https://bugzilla.suse.com/1201367","tags":["report"]},{"url":"https://bugzilla.suse.com/1205808","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2020-13253","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-13754","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-14394","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-17380","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-25085","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-3409","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-3507","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-3929","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2021-4206","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2022-0216","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2022-1050","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2022-26354","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2022-35414","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2022-4144","tags":["web"]},{"url":"https://www.suse.com/support/update/announcement/2023/suse-su-20230840-1/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1202364","tags":["report"]},{"url":"https://www.suse.com/support/update/announcement/2023/suse-su-20230879-1/","tags":["advisory"]},{"url":"https://www.suse.com/support/update/announcement/2023/suse-su-20230879-2/","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2020-14394","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-6567-1","tags":["advisory"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-14394","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-8412-1","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2020-24165","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2021-3611","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2021-3638","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2023-1544","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2023-2861","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2023-3180","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2023-3255","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2023-3301","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2023-3354","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2023-4135","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2023-5088","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2023-40360","tags":["report"]},{"url":"https://ubuntu.com/security/CVE-2023-42467","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2020-14394","description":"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.","status":"published","published":"2022-08-17T00:00:00Z","modified":"2024-08-04T12:46:34.221Z","cwes":["CWE-835"],"updated_at":"2026-11-02T14:35:46.873079Z"}],"euvd":[{"id":"EUVD-2020-6533","description":"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.","status":"published","published":"2022-08-17T00:00:00Z","modified":"2024-08-04T12:46:34Z","updated_at":"2026-11-03T03:07:34.099541Z"}],"ghsa":[{"id":"GHSA-9gg5-9c3q-7g76","title":"An infinite loop flaw was found in the USB xHCI controller emulation of QEMU while computing the...","description":"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.","status":"published","published":"2022-08-18T00:00:16Z","modified":"2023-03-15T00:30:47Z","cvss":[{"version":"3.1","score":3.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L","level":"low"}],"cwes":["CWE-835"],"updated_at":"2026-11-02T14:54:20.892008Z"}],"nvd":[{"id":"CVE-2020-14394","description":"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.","status":"published","published":"2022-08-17T21:15:07.913Z","modified":"2026-06-17T02:54:41.353Z","cvss":[{"version":"3.1","score":3.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L","level":"low","assessor":"primary"}],"cwes":["CWE-835"],"updated_at":"2026-11-02T14:06:46.951463Z"}],"osv":[{"id":"BELL-CVE-2020-14394","title":"CVE-2020-14394 does not affect BellSoft software","status":"withdrawn","published":"2022-08-17T21:15:00Z","modified":"2026-01-26T09:46:51.805456Z","cvss":[{"version":"3.1","score":3.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L","level":"low"}],"updated_at":"2026-11-02T15:28:15.925958Z"},{"id":"CVE-2020-14394","description":"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.","status":"published","published":"2022-08-17T21:15:07.913Z","modified":"2026-10-22T02:48:14.129504579Z","cvss":[{"version":"3.1","score":3.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L","level":"low"}],"updated_at":"2026-11-02T15:44:14.418339Z"},{"id":"DEBIAN-CVE-2020-14394","description":"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.","status":"published","published":"2022-08-17T21:15:07.913Z","modified":"2026-10-26T12:01:36.647322014Z","cvss":[{"version":"3.1","score":3.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L","level":"low"}],"updated_at":"2026-11-02T15:45:32.862554Z"},{"id":"OESA-2022-1918","title":"qemu security update","description":"QEMU is a FAST! processor emulator using dynamic translation to achieve good emulation speed.\n\n\t\tQEMU has two operating modes:\n\n\t\tFull system emulation. In this mode, QEMU emulates a full system (for example a PC),\n\t\tincluding one or several processors and various peripherals. It can be used to launch\n\t\tdifferent Operating Systems without rebooting the PC or to debug system code.\n\n\t\tUser mode emulation. In this mode, QEMU can launch processes compiled for one CPU on another CPU.\n\t\tIt can be used to launch the Wine Windows API emulator (https://www.winehq.org) or to ease\n\t\tcross-compilation and cross-debugging.\n\t\tYou can refer to https://www.qemu.org for more infortmation.\n\r\n\r\nSecurity Fix(es):\r\n\r\nAn 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.(CVE-2020-14394)","status":"published","published":"2022-09-16T11:05:13Z","modified":"2026-08-18T01:17:18.611348032Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:52:39.528805Z"},{"id":"UBUNTU-CVE-2020-14394","description":"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.","status":"published","published":"2022-08-17T21:15:00Z","modified":"2026-06-09T21:29:23.62043657Z","cvss":[{"version":"3.1","score":3.2,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L","level":"low"}],"updated_at":"2026-11-02T15:54:22.804634Z"},{"id":"DLA-3362-1","title":"qemu - security update","status":"published","published":"2023-03-14T00:00:00Z","modified":"2026-03-09T01:23:24.053929Z","updated_at":"2026-11-02T15:46:11.734021Z"},{"id":"SUSE-SU-2023:0761-1","title":"Security update for qemu","description":"This update for qemu fixes the following issues:\n\n- bsc#1172033 (CVE-2020-13253)\n\n- bsc#1180207 (CVE-2020-14394)\n\n- bsc#1172382 (CVE-2020-13754)\n\n- bsc#1198038 (CVE-2022-0216)\n\n- bsc#1193880 (CVE-2021-3929)\n\n- bsc#1197653 (CVE-2022-1050)\n\n- bsc#1205808 (CVE-2022-4144), bsc#1198712 (CVE-2022-26354)\n  \n- bsc#1175144 (CVE-2020-17380, CVE-2020-25085, CVE-2021-3409),\n  bsc#1185000 (CVE-2021-3507), bsc#1201367, CVE-2022-35414\n- About bsc#1175144, see also bsc#1182282 (CVE-2021-3409)\n  \n- bsc#1198035, CVE-2021-4206\n","status":"published","published":"2023-03-16T10:35:54Z","modified":"2026-02-04T04:04:51.058114Z","updated_at":"2026-11-02T15:53:52.350754Z"},{"id":"SUSE-SU-2023:0840-1","title":"Security update for qemu","description":"This update for qemu fixes the following issues:\n  \n- CVE-2022-4144: Fixed unsafe address translation can lead to out-of-bounds read in qxl_phys2virt (bsc#1205808).\n- CVE-2021-3507: Fixed heap buffer overflow in DMA read data transfers in fdc (bsc#1185000).\n- CVE-2020-14394: Fixed infinite loop in xhci_ring_chain_length() (bsc#1180207).\n- CVE-2022-0216: Fixed a use-after-free in lsi_do_msgout function in hw/scsi/lsi53c895a.c (bsc#1198038).\n- CVE-2022-1050: Fixed a use-after-free issue in pvrdma_exec_cmd() in pvrdma (bsc#1197653).\n- CVE-2021-3929: Fixed a DMA reentrancy issue leads to use-after-free in nvme (bsc#1193880).\n\nThe following non-security bugs were fixed:\n\n- Fix bsc#1202364.\n","status":"published","published":"2023-03-21T08:54:28Z","modified":"2026-02-04T04:37:43.316997Z","updated_at":"2026-11-02T15:53:52.350754Z"},{"id":"SUSE-SU-2023:0879-1","title":"Security update for qemu","description":"This update for qemu fixes the following issues:\n\n- CVE-2021-3507: Fixed heap buffer overflow in DMA read data transfers in fdc (bsc#1185000).\n- CVE-2020-14394: Fixed infinite loop in xhci_ring_chain_length() (bsc#1180207).\n","status":"published","published":"2023-03-23T07:59:55Z","modified":"2026-02-04T03:11:49.812711Z","updated_at":"2026-11-02T15:53:52.350754Z"},{"id":"SUSE-SU-2023:0879-2","title":"Security update for qemu","description":"This update for qemu fixes the following issues:\n\n- CVE-2021-3507: Fixed heap buffer overflow in DMA read data transfers in fdc (bsc#1185000).\n- CVE-2020-14394: Fixed infinite loop in xhci_ring_chain_length() (bsc#1180207).\n","status":"published","published":"2023-04-27T13:55:23Z","modified":"2026-02-04T03:47:30.576545Z","updated_at":"2026-11-02T15:53:52.350754Z"},{"id":"USN-6567-1","title":"qemu vulnerabilities","description":"Gaoning Pan and Xingwei Li discovered that QEMU incorrectly handled the\nUSB xHCI controller device. A privileged guest attacker could possibly use\nthis issue to cause QEMU to crash, leading to a denial of service. This\nissue only affected Ubuntu 20.04 LTS and Ubuntu 22.04 LTS. (CVE-2020-14394)\n\nIt was discovered that QEMU incorrectly handled the TCG Accelerator. A\nlocal attacker could use this issue to cause QEMU to crash, leading to a\ndenial of service, or possibly execute arbitrary code and esclate\nprivileges. This issue only affected Ubuntu 20.04 LTS. (CVE-2020-24165)\n\nIt was discovered that QEMU incorrectly handled the Intel HD audio device.\nA malicious guest attacker could use this issue to cause QEMU to crash,\nleading to a denial of service. This issue only affected Ubuntu 22.04 LTS.\n(CVE-2021-3611)\n\nIt was discovered that QEMU incorrectly handled the ATI VGA device. A\nmalicious guest attacker could use this issue to cause QEMU to crash,\nleading to a denial of service. This issue only affected Ubuntu 20.04 LTS.\n(CVE-2021-3638)\n\nIt was discovered that QEMU incorrectly handled the VMWare paravirtual RDMA\ndevice. A malicious guest attacker could use this issue to cause QEMU to\ncrash, leading to a denial of service. (CVE-2023-1544)\n\nIt was discovered that QEMU incorrectly handled the 9p passthrough\nfilesystem. A malicious guest attacker could possibly use this issue to\nopen special files and escape the exported 9p tree. This issue only\naffected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, and Ubuntu 23.04.\n(CVE-2023-2861)\n\nIt was discovered that QEMU incorrectly handled the virtual crypto device.\nA malicious guest attacker could use this issue to cause QEMU to crash,\nleading to a denial of service, or possibly execute arbitrary code. This\nissue only affected Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, and Ubuntu 23.04.\n(CVE-2023-3180)\n\nIt was discovered that QEMU incorrectly handled the built-in VNC server.\nA remote authenticated attacker could possibly use this issue to cause QEMU\nto stop responding, resulting in a denial of service. This issue only\naffected Ubuntu 22.04 LTS and Ubuntu 23.04. (CVE-2023-3255)\n\nIt was discovered that QEMU incorrectly handled net device hot-unplugging.\nA malicious guest attacker could use this issue to cause QEMU to crash,\nleading to a denial of service. This issue only affected Ubuntu 22.04 LTS\nand Ubuntu 23.04. (CVE-2023-3301)\n\nIt was discovered that QEMU incorrectly handled the built-in VNC server.\nA remote attacker could possibly use this issue to cause QEMU to crash,\nresulting in a denial of service. This issue only affected Ubuntu 20.04\nLTS, Ubuntu 22.04 LTS, and Ubuntu 23.04. (CVE-2023-3354)\n\nIt was discovered that QEMU incorrectly handled NVME devices. A malicious\nguest attacker could use this issue to cause QEMU to crash, leading to a\ndenial of service. This issue only affected Ubuntu 23.10. (CVE-2023-40360)\n\nIt was discovered that QEMU incorrectly handled NVME devices. A malicious\nguest attacker could use this issue to cause QEMU to crash, leading to a\ndenial of service, or possibly obtain sensitive information. This issue\nonly affected Ubuntu 23.10. (CVE-2023-4135)\n\nIt was discovered that QEMU incorrectly handled SCSI devices. A malicious\nguest attacker could use this issue to cause QEMU to crash, leading to a\ndenial of service. This issue only affected Ubuntu 23.04 and Ubuntu 23.10.\n(CVE-2023-42467)\n\nIt was discovered that QEMU incorrectly handled certain disk offsets. A\nmalicious guest attacker could possibly use this issue to gain control of\nthe host in certain nested virtualization scenarios. (CVE-2023-5088)\n","status":"published","published":"2024-01-08T17:46:08Z","modified":"2026-04-27T17:17:23.282117066Z","updated_at":"2026-11-02T16:58:17.305935Z"}]}}