{"id":"CVE-2019-20175","aliases":["DEBIAN-CVE-2019-20175","EUVD-2019-10729","GHSA-4r96-hw22-hhc7"],"status":"disputed","title":"** DISPUTED ** An issue was discovered in ide_dma_cb() in hw/ide/core.c in QEMU 2.4.0 through 4.2...","description":"An issue was discovered in ide_dma_cb() in hw/ide/core.c in QEMU 2.4.0 through 4.2.0. The guest system can crash the QEMU process in the host system via a special SCSI_IOCTL_SEND_COMMAND. It hits an assertion that implies that the size of successful DMA transfers there must be a multiple of 512 (the size of a sector). NOTE: a member of the QEMU security team disputes the significance of this issue because a \"privileged guest user has many ways to cause similar DoS effect, without triggering this assert.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-07","score":0.03355,"percentile":0.88774,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-754"],"published":"2019-12-31T03:27:40Z","modified":"2026-10-24T10:30:35Z","fixes":[{"ecosystem":"Debian:12","package":"qemu","fixed_in":["1:5.0-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"qemu","fixed_in":["1:5.0-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"qemu","fixed_in":["1:5.0-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"qemu","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:5.0-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"qemu","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:5.0-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"qemu","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:5.0-1"}]}]}],"products":[{"vendor":"qemu","product":"qemu"}],"references":[{"url":"https://lists.nongnu.org/archive/html/qemu-devel/2019-07/msg01651.html","tags":["x_refsource_MISC","x_transferred","Exploit","Mailing List","Third Party Advisory","evidence"]},{"url":"https://lists.nongnu.org/archive/html/qemu-devel/2019-11/msg00597.html","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","advisory"]},{"url":"https://lists.nongnu.org/archive/html/qemu-devel/2019-11/msg02165.html","tags":["x_refsource_MISC","x_transferred","Mailing List","Patch","Third Party Advisory","fix"]},{"url":"https://www.mail-archive.com/qemu-devel%40nongnu.org/msg667396.html","tags":["x_refsource_MISC","x_transferred","web"]},{"url":"https://lists.nongnu.org/archive/html/qemu-devel/2019-07/msg03869.html","tags":["x_refsource_MISC","x_transferred","Mailing List","Third Party Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-20175"},{"url":"https://www.mail-archive.com/qemu-devel@nongnu.org/msg667396.html"},{"url":"https://github.com/advisories/GHSA-4r96-hw22-hhc7"},{"url":"https://security-tracker.debian.org/tracker/CVE-2019-20175","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2019-20175","description":"An issue was discovered in ide_dma_cb() in hw/ide/core.c in QEMU 2.4.0 through 4.2.0. The guest system can crash the QEMU process in the host system via a special SCSI_IOCTL_SEND_COMMAND. It hits an assertion that implies that the size of successful DMA transfers there must be a multiple of 512 (the size of a sector). NOTE: a member of the QEMU security team disputes the significance of this issue because a \"privileged guest user has many ways to cause similar DoS effect, without triggering this assert.","status":"disputed","published":"2019-12-31T03:27:40Z","modified":"2024-08-05T02:39:09.821Z","updated_at":"2026-11-02T14:20:17.431882Z"}],"euvd":[{"id":"EUVD-2019-10729","description":"An issue was discovered in ide_dma_cb() in hw/ide/core.c in QEMU 2.4.0 through 4.2.0. The guest system can crash the QEMU process in the host system via a special SCSI_IOCTL_SEND_COMMAND. It hits an assertion that implies that the size of successful DMA transfers there must be a multiple of 512 (the size of a sector). NOTE: a member of the QEMU security team disputes the significance of this issue because a \"privileged guest user has many ways to cause similar DoS effect, without triggering this assert.","status":"published","published":"2019-12-31T03:27:40Z","modified":"2024-08-05T02:39:09Z","updated_at":"2026-11-03T02:40:22.702411Z"}],"ghsa":[{"id":"GHSA-4r96-hw22-hhc7","title":"** DISPUTED ** An issue was discovered in ide_dma_cb() in hw/ide/core.c in QEMU 2.4.0 through 4.2...","description":"** DISPUTED ** An issue was discovered in ide_dma_cb() in hw/ide/core.c in QEMU 2.4.0 through 4.2.0. The guest system can crash the QEMU process in the host system via a special SCSI_IOCTL_SEND_COMMAND. It hits an assertion that implies that the size of successful DMA transfers there must be a multiple of 512 (the size of a sector). NOTE: a member of the QEMU security team disputes the significance of this issue because a \"privileged guest user has many ways to cause similar DoS effect, without triggering this assert.\"","status":"published","published":"2022-05-24T17:05:26Z","modified":"2024-03-30T05:01:39Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-754"],"updated_at":"2026-11-02T14:55:44.65747Z"}],"nvd":[{"id":"CVE-2019-20175","description":"An issue was discovered in ide_dma_cb() in hw/ide/core.c in QEMU 2.4.0 through 4.2.0. The guest system can crash the QEMU process in the host system via a special SCSI_IOCTL_SEND_COMMAND. It hits an assertion that implies that the size of successful DMA transfers there must be a multiple of 512 (the size of a sector). NOTE: a member of the QEMU security team disputes the significance of this issue because a \"privileged guest user has many ways to cause similar DoS effect, without triggering this assert.","status":"disputed","published":"2019-12-31T04:15:10.503Z","modified":"2026-06-17T02:30:09.773Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-754"],"updated_at":"2026-11-02T14:05:41.313583Z"}],"osv":[{"id":"CVE-2019-20175","description":"An issue was discovered in ide_dma_cb() in hw/ide/core.c in QEMU 2.4.0 through 4.2.0. The guest system can crash the QEMU process in the host system via a special SCSI_IOCTL_SEND_COMMAND. It hits an assertion that implies that the size of successful DMA transfers there must be a multiple of 512 (the size of a sector). NOTE: a member of the QEMU security team disputes the significance of this issue because a \"privileged guest user has many ways to cause similar DoS effect, without triggering this assert.","status":"published","published":"2019-12-31T04:15:10.503Z","modified":"2026-10-24T10:30:35.489569558Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:12.010761Z"},{"id":"DEBIAN-CVE-2019-20175","description":"An issue was discovered in ide_dma_cb() in hw/ide/core.c in QEMU 2.4.0 through 4.2.0. The guest system can crash the QEMU process in the host system via a special SCSI_IOCTL_SEND_COMMAND. It hits an assertion that implies that the size of successful DMA transfers there must be a multiple of 512 (the size of a sector). NOTE: a member of the QEMU security team disputes the significance of this issue because a \"privileged guest user has many ways to cause similar DoS effect, without triggering this assert.","status":"published","published":"2019-12-31T04:15:10.503Z","modified":"2026-09-21T07:03:15.625188811Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:32.221385Z"}]}}