{"id":"CVE-2020-35504","aliases":["ALPINE-CVE-2020-35504","BELL-CVE-2020-35504","DEBIAN-CVE-2020-35504","DLA-3099-1","EUVD-2020-23173","GHSA-9hxx-56x6-jhj8","OESA-2021-1241","SUSE-SU-2021:2789-1","SUSE-SU-2021:2813-1","SUSE-SU-2021:2858-1","SUSE-SU-2021:3575-1","SUSE-SU-2021:3613-1","SUSE-SU-2021:3614-1","SUSE-SU-2021:3635-1","UBUNTU-CVE-2020-35504","USN-5010-1","openSUSE-SU-2021:1202-1","openSUSE-SU-2021:2789-1","openSUSE-SU-2021:2858-1","openSUSE-SU-2021:3614-1"],"status":"published","title":"A NULL pointer dereference flaw was found in the SCSI emulation support of QEMU in versions...","description":"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.","severity":{"version":"3.1","score":6,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.00338,"percentile":0.27392,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-476"],"published":"2021-05-28T10:20:40Z","modified":"2026-11-03T06:32:46Z","fixes":[{"ecosystem":"Alpine:v3.16","package":"qemu","fixed_in":["6.0.0-r2"],"sources":["osv"]},{"ecosystem":"Alpine:v3.17","package":"qemu","fixed_in":["6.0.0-r2"],"sources":["osv"]},{"ecosystem":"Alpine:v3.18","package":"qemu","fixed_in":["6.0.0-r2"],"sources":["osv"]},{"ecosystem":"Alpine:v3.19","package":"qemu","fixed_in":["6.0.0-r2"],"sources":["osv"]},{"ecosystem":"Alpine:v3.20","package":"qemu","fixed_in":["6.0.0-r2"],"sources":["osv"]},{"ecosystem":"Alpine:v3.21","package":"qemu","fixed_in":["6.0.0-r2"],"sources":["osv"]},{"ecosystem":"Alpine:v3.22","package":"qemu","fixed_in":["6.0.0-r2"],"sources":["osv"]},{"ecosystem":"Alpine:v3.23","package":"qemu","fixed_in":["6.0.0-r2"],"sources":["osv"]},{"ecosystem":"Alpine:v3.24","package":"qemu","fixed_in":["6.0.0-r2"],"sources":["osv"]},{"ecosystem":"Debian:12","package":"qemu","fixed_in":["1:6.0+dfsg-3"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"qemu","fixed_in":["1:6.0+dfsg-3"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"qemu","fixed_in":["1:6.0+dfsg-3"],"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:18.04:LTS","package":"qemu","fixed_in":["1:2.11+dfsg-1ubuntu7.37"],"sources":["osv"]},{"ecosystem":"Ubuntu:20.04:LTS","package":"qemu","fixed_in":["1:4.2-3ubuntu6.17"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Alpine:v3.16","package":"qemu","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.0-r2"}]}]},{"source":"osv","ecosystem":"Alpine:v3.17","package":"qemu","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.0-r2"}]}]},{"source":"osv","ecosystem":"Alpine:v3.18","package":"qemu","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.0-r2"}]}]},{"source":"osv","ecosystem":"Alpine:v3.19","package":"qemu","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.0-r2"}]}]},{"source":"osv","ecosystem":"Alpine:v3.20","package":"qemu","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.0-r2"}]}]},{"source":"osv","ecosystem":"Alpine:v3.21","package":"qemu","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.0-r2"}]}]},{"source":"osv","ecosystem":"Alpine:v3.22","package":"qemu","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.0-r2"}]}]},{"source":"osv","ecosystem":"Alpine:v3.23","package":"qemu","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.0-r2"}]}]},{"source":"osv","ecosystem":"Alpine:v3.24","package":"qemu","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.0-r2"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"qemu","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:6.0+dfsg-3"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"qemu","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:6.0+dfsg-3"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"qemu","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:6.0+dfsg-3"}]}]},{"source":"osv","ecosystem":"Debian:10","package":"qemu","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1:3.1+dfsg-8+deb10u9"}]}],"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~deb10u1"],"bundled":35},{"source":"osv","ecosystem":"openEuler:20.03-LTS-SP1","package":"qemu","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.0-50.oe1"}]}],"bundled":5},{"source":"osv","ecosystem":"SUSE:Linux 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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.","status":"published","published":"2021-05-28T10:20:40Z","modified":"2024-08-04T17:02:08.026Z","cwes":["CWE-476"],"updated_at":"2026-11-02T14:35:58.331892Z"}],"euvd":[{"id":"EUVD-2020-23173","description":"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.","status":"published","published":"2021-05-28T10:20:40Z","modified":"2024-08-04T17:02:08Z","updated_at":"2026-11-03T03:07:06.389211Z"}],"ghsa":[{"id":"GHSA-9hxx-56x6-jhj8","title":"A NULL pointer dereference flaw was found in the SCSI emulation support of QEMU in versions...","description":"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.","status":"published","published":"2022-05-24T19:03:38Z","modified":"2023-02-03T05:04:28Z","cvss":[{"version":"3.1","score":6,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T14:53:33.746621Z"}],"nvd":[{"id":"CVE-2020-35504","description":"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.","status":"published","published":"2021-05-28T11:15:07.75Z","modified":"2026-06-17T03:13:49.59Z","cvss":[{"version":"3.1","score":6,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H","level":"medium","assessor":"primary"},{"version":"2.0","score":2.1,"vector":"AV:L/AC:L/Au:N/C:N/I:N/A:P","level":"low","assessor":"primary"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T14:06:43.288951Z"}],"osv":[{"id":"ALPINE-CVE-2020-35504","description":"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.","status":"published","published":"2021-05-28T11:15:07.75Z","modified":"2026-11-03T06:32:46.169027457Z","cvss":[{"version":"3.1","score":6,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-03T07:16:46.202932Z"},{"id":"BELL-CVE-2020-35504","title":"CVE-2020-35504 does not affect BellSoft software","status":"withdrawn","published":"2023-08-31T12:13:57.433329Z","modified":"2026-01-26T09:47:20.603862Z","cvss":[{"version":"3.1","score":6,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:28:15.925958Z"},{"id":"CVE-2020-35504","description":"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.","status":"published","published":"2021-05-28T11:15:07.75Z","modified":"2026-10-24T10:30:58.952210235Z","cvss":[{"version":"3.1","score":6,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:44:16.612899Z"},{"id":"DEBIAN-CVE-2020-35504","description":"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.","status":"published","published":"2021-05-28T11:15:07.75Z","modified":"2026-10-26T12:02:48.420374249Z","cvss":[{"version":"3.1","score":6,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:45:34.019707Z"},{"id":"OESA-2021-1241","title":"qemu security update","description":"QEMU is a FAST! processor emulator using dynamic translation to achieve good emulation speed.\r\n\r\nSecurity Fix(es):\r\n\r\nA 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.(CVE-2020-35504)\r\n\r\nA 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.(CVE-2021-3527)\r\n\r\nAn 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.(CVE-2021-20221)\r\n\r\nA 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 \u0026apos;Information Transfer\u0026apos; 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.(CVE-2020-35505)\r\n\r\nThe ahci_commit_buf function in ide/ahci.c in QEMU allows attackers to cause a denial of service (NULL dereference) when the command header \u0026apos;ad-\u0026gt;cur_cmd\u0026apos; is null.(CVE-2019-12067)","status":"published","published":"2021-06-26T11:04:28Z","modified":"2026-08-18T01:15:47.109656151Z","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":"2026-11-02T15:52:38.987987Z"},{"id":"UBUNTU-CVE-2020-35504","description":"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.","status":"published","published":"2021-05-28T11:15:00Z","modified":"2026-06-09T21:29:23.473253062Z","cvss":[{"version":"3.1","score":6,"vector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T15:54:25.179924Z"},{"id":"DLA-3099-1","title":"qemu - security update","status":"published","published":"2022-09-05T00:00:00Z","modified":"2026-03-09T01:23:02.473037Z","updated_at":"2026-11-02T15:46:11.189256Z"},{"id":"openSUSE-SU-2021:1202-1","title":"Security update for qemu","description":"This update for qemu fixes the following issues:\n\nSecurity issues fixed:\n\n- CVE-2021-3527: usb: unbounded stack allocation in usbredir (bsc#1186012)\n- CVE-2021-3582: Fix possible mremap overflow in the pvrdma (bsc#1187499)\n- CVE-2021-3592: Fix for slirp: invalid pointer initialization may lead to information disclosure (bootp) (bsc#1187364)\n- CVE-2021-3593: Fix for slirp: invalid pointer initialization may lead to information disclosure (udp6) (bsc#1187365)\n- CVE-2021-3594: Fix for slirp: invalid pointer initialization may lead to information disclosure (udp) (bsc#1187367)\n- CVE-2021-3595: Fixed slirp: invalid pointer initialization may lead to information disclosure (tftp) (bsc#1187366)\n- CVE-2021-3607: Ensure correct input on ring init (bsc#1187539)\n- CVE-2021-3608: Fix the ring init error flow (bsc#1187538)\n- CVE-2021-3611: Fix intel-hda segmentation fault due to stack overflow (bsc#1187529)\n- CVE-2021-3682: usbredir: free call on invalid pointer in bufp_alloc (bsc#1189145)\n- CVE-2020-35503: NULL pointer dereference issue in megasas-gen2 host bus adapter (bsc#1180432)\n- CVE-2020-35504,CVE-2020-35505,CVE-2020-35506: NULL pointer dereference in ESP (bsc#1180433 bsc#1180434 bsc#1180435)\n- CVE-2021-20255: eepro100: stack overflow via infinite recursion (bsc#1182651)\n\nThis update was imported from the SUSE:SLE-15-SP2:Update update project.","status":"published","published":"2021-08-26T16:06:03Z","modified":"2026-02-04T03:01:20.988586Z","updated_at":"2026-11-02T16:58:32.266854Z"},{"id":"openSUSE-SU-2021:2789-1","title":"Security update for qemu","description":"This update for qemu fixes the following issues:\n\nSecurity issues fixed:\n\n- usbredir: free call on invalid pointer in bufp_alloc (bsc#1189145, CVE-2021-3682)\n- NULL pointer dereference in ESP (bsc#1180433, CVE-2020-35504) (bsc#1180434, CVE-2020-35505) (bsc#1180435, CVE-2020-35506)\n- NULL pointer dereference issue in megasas-gen2 host bus adapter (bsc#1180432, CVE-2020-35503)\n- eepro100: stack overflow via infinite recursion (bsc#1182651, CVE-2021-20255)\n- usb: unbounded stack allocation in usbredir (bsc#1186012, CVE-2021-3527)\n","status":"published","published":"2021-08-20T08:08:20Z","modified":"2026-02-04T03:16:13.861453Z","updated_at":"2026-11-02T16:58:32.266854Z"},{"id":"openSUSE-SU-2021:2858-1","title":"Security update for qemu","description":"This update for qemu fixes the following issues:\n\nSecurity issues fixed:\n\n- usbredir: free call on invalid pointer in bufp_alloc (bsc#1189145, CVE-2021-3682)\n- NULL pointer dereference in ESP (bsc#1180433, CVE-2020-35504) (bsc#1180434, CVE-2020-35505) (bsc#1180435, CVE-2020-35506)\n- NULL pointer dereference issue in megasas-gen2 host bus adapter (bsc#1180432, CVE-2020-35503)\n- eepro100: stack overflow via infinite recursion (bsc#1182651, CVE-2021-20255)\n- usb: unbounded stack allocation in usbredir (bsc#1186012, CVE-2021-3527)\n\nNon-security issues fixed:\n\n- Use max host physical address if -cpu max is used (bsc#1188299)\n","status":"published","published":"2021-08-27T09:59:38Z","modified":"2026-02-04T02:41:54.456338Z","updated_at":"2026-11-02T16:58:32.266854Z"},{"id":"openSUSE-SU-2021:3614-1","title":"Security update for qemu","description":"This update for qemu fixes the following issues:\n\nSecurity issues fixed:\n\n- Fix out-of-bounds write in UAS (USB Attached SCSI) device emulation (bsc#1189702, CVE-2021-3713)\n- Fix heap use-after-free in virtio_net_receive_rcu (bsc#1189938, CVE-2021-3748)\n- usbredir: free call on invalid pointer in bufp_alloc (bsc#1189145, CVE-2021-3682)\n- NULL pointer dereference in ESP (bsc#1180433, CVE-2020-35504) (bsc#1180434, CVE-2020-35505) (bsc#1180435, CVE-2020-35506)\n- NULL pointer dereference issue in megasas-gen2 host bus adapter (bsc#1180432, CVE-2020-35503)\n- eepro100: stack overflow via infinite recursion (bsc#1182651, CVE-2021-20255)\n- usb: unbounded stack allocation in usbredir (bsc#1186012, CVE-2021-3527)\n\nNon-security issues fixed:\n\n- Use max host physical address if -cpu max is used (bsc#1188299)\n","status":"published","published":"2021-11-04T11:27:20Z","modified":"2026-02-04T03:46:07.528535Z","updated_at":"2026-11-02T16:58:32.266854Z"},{"id":"SUSE-SU-2021:2789-1","title":"Security update for qemu","description":"This update for qemu fixes the following issues:\n\nSecurity issues fixed:\n\n- usbredir: free call on invalid pointer in bufp_alloc (bsc#1189145, CVE-2021-3682)\n- NULL pointer dereference in ESP (bsc#1180433, CVE-2020-35504) (bsc#1180434, CVE-2020-35505) (bsc#1180435, CVE-2020-35506)\n- NULL pointer dereference issue in megasas-gen2 host bus adapter (bsc#1180432, CVE-2020-35503)\n- eepro100: stack overflow via infinite recursion (bsc#1182651, CVE-2021-20255)\n- usb: unbounded stack allocation in usbredir (bsc#1186012, CVE-2021-3527)\n","status":"published","published":"2021-08-20T08:08:19Z","modified":"2026-02-04T03:02:32.919239Z","updated_at":"2026-11-02T15:53:49.605187Z"},{"id":"SUSE-SU-2021:2813-1","title":"Security update for qemu","description":"This update for qemu fixes the following issues:\n\nSecurity issues fixed:\n\n- usbredir: free call on invalid pointer in bufp_alloc (bsc#1189145, CVE-2021-3682)\n- NULL pointer dereference in ESP (bsc#1180433, CVE-2020-35504) (bsc#1180434, CVE-2020-35505) (bsc#1180435, CVE-2020-35506)\n- NULL pointer dereference issue in megasas-gen2 host bus adapter (bsc#1180432, CVE-2020-35503)\n- eepro100: stack overflow via infinite recursion (bsc#1182651, CVE-2021-20255)\n- usb: unbounded stack allocation in usbredir (bsc#1186012, CVE-2021-3527)\n","status":"published","published":"2021-08-23T10:19:27Z","modified":"2025-05-02T04:30:49.97319Z","updated_at":"2026-11-02T15:53:49.605187Z"},{"id":"SUSE-SU-2021:2858-1","title":"Security update for qemu","description":"This update for qemu fixes the following issues:\n\nSecurity issues fixed:\n\n- usbredir: free call on invalid pointer in bufp_alloc (bsc#1189145, CVE-2021-3682)\n- NULL pointer dereference in ESP (bsc#1180433, CVE-2020-35504) (bsc#1180434, CVE-2020-35505) (bsc#1180435, CVE-2020-35506)\n- NULL pointer dereference issue in megasas-gen2 host bus adapter (bsc#1180432, CVE-2020-35503)\n- eepro100: stack overflow via infinite recursion (bsc#1182651, CVE-2021-20255)\n- usb: unbounded stack allocation in usbredir (bsc#1186012, CVE-2021-3527)\n\nNon-security issues fixed:\n\n- Use max host physical address if -cpu max is used (bsc#1188299)\n","status":"published","published":"2021-08-27T09:59:37Z","modified":"2025-05-02T04:30:50.035809Z","updated_at":"2026-11-02T15:53:49.605187Z"},{"id":"SUSE-SU-2021:3575-1","title":"Security update for qemu","description":"This update for qemu fixes the following issues:\n\nSecurity issues fixed:\n\n- usbredir: free call on invalid pointer in bufp_alloc (bsc#1189145, CVE-2021-3682)\n- NULL pointer dereference in ESP (bsc#1180433, CVE-2020-35504) (bsc#1180434, CVE-2020-35505) (bsc#1180435, CVE-2020-35506)\n- NULL pointer dereference issue in megasas-gen2 host bus adapter (bsc#1180432, CVE-2020-35503)\n- eepro100: stack overflow via infinite recursion (bsc#1182651, CVE-2021-20255)\n- usb: unbounded stack allocation in usbredir (bsc#1186012, CVE-2021-3527)\n","status":"published","published":"2021-10-28T16:03:26Z","modified":"2026-02-04T03:17:03.543924Z","updated_at":"2026-11-02T15:53:49.605187Z"},{"id":"SUSE-SU-2021:3613-1","title":"Security update for qemu","description":"This update for qemu fixes the following issues:\n\nSecurity issues fixed:\n\n- Fix heap use-after-free in virtio_net_receive_rcu (bsc#1189938, CVE-2021-3748)\n- Fix out-of-bounds write in UAS (USB Attached SCSI) device emulation (bsc#1189702, CVE-2021-3713)\n- usbredir: free call on invalid pointer in bufp_alloc (bsc#1189145, CVE-2021-3682)\n- NULL pointer dereference in ESP (bsc#1180433, CVE-2020-35504) (bsc#1180434, CVE-2020-35505) (bsc#1180435, CVE-2020-35506)\n- NULL pointer dereference issue in megasas-gen2 host bus adapter (bsc#1180432, CVE-2020-35503)\n- eepro100: stack overflow via infinite recursion (bsc#1182651, CVE-2021-20255)\n- usb: unbounded stack allocation in usbredir (bsc#1186012, CVE-2021-3527)\n","status":"published","published":"2021-11-04T11:26:25Z","modified":"2026-02-04T04:14:58.118776Z","updated_at":"2026-11-02T15:53:49.605187Z"},{"id":"SUSE-SU-2021:3614-1","title":"Security update for qemu","description":"This update for qemu fixes the following issues:\n\nSecurity issues fixed:\n\n- Fix out-of-bounds write in UAS (USB Attached SCSI) device emulation (bsc#1189702, CVE-2021-3713)\n- Fix heap use-after-free in virtio_net_receive_rcu (bsc#1189938, CVE-2021-3748)\n- usbredir: free call on invalid pointer in bufp_alloc (bsc#1189145, CVE-2021-3682)\n- NULL pointer dereference in ESP (bsc#1180433, CVE-2020-35504) (bsc#1180434, CVE-2020-35505) (bsc#1180435, CVE-2020-35506)\n- NULL pointer dereference issue in megasas-gen2 host bus adapter (bsc#1180432, CVE-2020-35503)\n- eepro100: stack overflow via infinite recursion (bsc#1182651, CVE-2021-20255)\n- usb: unbounded stack allocation in usbredir (bsc#1186012, CVE-2021-3527)\n\nNon-security issues fixed:\n\n- Use max host physical address if -cpu max is used (bsc#1188299)\n","status":"published","published":"2021-11-04T11:27:35Z","modified":"2026-02-04T04:31:47.827558Z","updated_at":"2026-11-02T15:53:49.605187Z"},{"id":"SUSE-SU-2021:3635-1","title":"Security update for qemu","description":"This update for qemu fixes the following issues:\n\nSecurity issues fixed:\n\n- Fix heap use-after-free in virtio_net_receive_rcu (bsc#1189938, CVE-2021-3748)\n- Fix out-of-bounds write in UAS (USB Attached SCSI) device emulation (bsc#1189702, CVE-2021-3713)\n- usbredir: free call on invalid pointer in bufp_alloc (bsc#1189145, CVE-2021-3682)\n- NULL pointer dereference in ESP (bsc#1180433, CVE-2020-35504) (bsc#1180434, CVE-2020-35505) (bsc#1180435, CVE-2020-35506)\n- NULL pointer dereference issue in megasas-gen2 host bus adapter (bsc#1180432, CVE-2020-35503)\n- eepro100: stack overflow via infinite recursion (bsc#1182651, CVE-2021-20255)\n- usb: unbounded stack allocation in usbredir (bsc#1186012, CVE-2021-3527)\n","status":"published","published":"2021-11-09T09:52:13Z","modified":"2026-02-04T02:13:53.800692Z","updated_at":"2026-11-02T15:53:49.605187Z"},{"id":"USN-5010-1","title":"qemu vulnerabilities","description":"Lei Sun discovered that QEMU incorrectly handled certain MMIO operations.\nAn attacker inside the guest could possibly use this issue to cause QEMU to\ncrash, resulting in a denial of service. (CVE-2020-15469)\n\nWenxiang Qian discovered that QEMU incorrectly handled certain ATAPI\ncommands. An attacker inside the guest could possibly use this issue to\ncause QEMU to crash, resulting in a denial of service. This issue only\naffected Ubuntu 21.04. (CVE-2020-29443)\n\nCheolwoo Myung discovered that QEMU incorrectly handled SCSI device\nemulation. An attacker inside the guest could possibly use this issue to\ncause QEMU to crash, resulting in a denial of service. (CVE-2020-35504,\nCVE-2020-35505, CVE-2021-3392)\n\nAlex Xu discovered that QEMU incorrectly handled the virtio-fs shared file\nsystem daemon. An attacker inside the guest could possibly use this issue\nto read and write to host devices. This issue only affected Ubuntu 20.10.\n(CVE-2020-35517)\n\nIt was discovered that QEMU incorrectly handled ARM Generic Interrupt\nController emulation. An attacker inside the guest could possibly use this\nissue to cause QEMU to crash, resulting in a denial of service. This issue\nonly affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, and Ubuntu 20.10.\n(CVE-2021-20221)\n\nAlexander Bulekov, Cheolwoo Myung, Sergej Schumilo, Cornelius Aschermann,\nand Simon Werner discovered that QEMU incorrectly handled e1000 device\nemulation. An attacker inside the guest could possibly use this issue to\ncause QEMU to hang, resulting in a denial of service. This issue only\naffected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, and Ubuntu 20.10.\n(CVE-2021-20257)\n\nIt was discovered that QEMU incorrectly handled SDHCI controller emulation.\nAn attacker inside the guest could use this issue to cause QEMU to crash,\nresulting in a denial of service, or possibly execute arbitrary code. In\nthe default installation, when QEMU is used in combination with libvirt,\nattackers would be isolated by the libvirt AppArmor profile.\n(CVE-2021-3409)\n\nIt was discovered that QEMU incorrectly handled certain NIC emulation\ndevices. An attacker inside the guest could possibly use this issue to\ncause QEMU to hang or crash, resulting in a denial of service. This issue\nonly affected Ubuntu 18.04 LTS, Ubuntu 20.04 LTS, and Ubuntu 20.10.\n(CVE-2021-3416)\n\nRemy Noel discovered that QEMU incorrectly handled the USB redirector\ndevice. An attacker inside the guest could possibly use this issue to\ncause QEMU to consume resources, resulting in a denial of service.\n(CVE-2021-3527)\n\nIt was discovered that QEMU incorrectly handled the virtio vhost-user GPU\ndevice. An attacker inside the guest could possibly use this issue to cause\nQEMU to consume resources, leading to a denial of service. This issue only\naffected Ubuntu 20.04 LTS, Ubuntu 20.10, and Ubuntu 21.04. (CVE-2021-3544)\n\nIt was discovered that QEMU incorrectly handled the virtio vhost-user GPU\ndevice. An attacker inside the guest could possibly use this issue to\nobtain sensitive host information. This issue only affected Ubuntu 20.04\nLTS, Ubuntu 20.10, and Ubuntu 21.04. (CVE-2021-3545)\n\nIt was discovered that QEMU incorrectly handled the virtio vhost-user GPU\ndevice. An attacker inside the guest could use this issue to cause QEMU to\ncrash, resulting in a denial of service, or possibly execute arbitrary\ncode. In the default installation, when QEMU is used in combination with\nlibvirt, attackers would be isolated by the libvirt AppArmor profile. This\nissue only affected Ubuntu 20.04 LTS, Ubuntu 20.10, and Ubuntu 21.04.\n(CVE-2021-3546)\n\nIt was discovered that QEMU incorrectly handled the PVRDMA device. An\nattacker inside the guest could use this issue to cause QEMU to crash,\nresulting in a denial of service, or possibly execute arbitrary code. In\nthe default installation, when QEMU is used in combination with libvirt,\nattackers would be isolated by the libvirt AppArmor profile. This issue\nonly affected Ubuntu 20.04 LTS, Ubuntu 20.10, and Ubuntu 21.04.\n(CVE-2021-3582, CVE-2021-3607, CVE-2021-3608)\n\nIt was discovered that QEMU SLiRP networking incorrectly handled certain\nudp packets. An attacker inside a guest could possibly use this issue to\nleak sensitive information from the host. (CVE-2021-3592, CVE-2021-3593,\nCVE-2021-3594, CVE-2021-3595)\n","status":"published","published":"2021-07-15T17:53:50Z","modified":"2026-04-27T16:03:35.569511515Z","updated_at":"2026-11-02T16:58:15.683829Z"}]}}