{"id":"CVE-2021-28693","aliases":["ALPINE-CVE-2021-28693","DEBIAN-CVE-2021-28693","EUVD-2021-15350","GHSA-jpfw-vm34-2p3p","SUSE-SU-2021:2922-1","SUSE-SU-2021:2923-1","SUSE-SU-2021:2924-1","SUSE-SU-2021:2925-1","UBUNTU-CVE-2021-28693","openSUSE-SU-2021:1236-1","openSUSE-SU-2021:2923-1"],"status":"published","title":"xen/arm: Boot modules are not scrubbed The bootloader will load boot modules (e.g. kernel,...","description":"xen/arm: Boot modules are not scrubbed The bootloader will load boot modules (e.g. kernel, initramfs...) in a temporary area before they are copied by Xen to each domain memory. To ensure sensitive data is not leaked from the modules, Xen must \"scrub\" them before handing the page over to the allocator. Unfortunately, it was discovered that modules will not be scrubbed on 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Boot modules are not scrubbed The bootloader will load boot modules (e.g. kernel, initramfs...) in a temporary area before they are copied by Xen to each domain memory. To ensure sensitive data is not leaked from the modules, Xen must \"scrub\" them before handing the page over to the allocator. Unfortunately, it was discovered that modules will not be scrubbed on Arm.","status":"published","published":"2021-06-30T10:32:26Z","modified":"2024-08-03T21:47:33.196Z","updated_at":"2026-11-02T14:33:08.811269Z"}],"euvd":[{"id":"EUVD-2021-15350","description":"xen/arm: Boot modules are not scrubbed The bootloader will load boot modules (e.g. kernel, initramfs...) in a temporary area before they are copied by Xen to each domain memory. To ensure sensitive data is not leaked from the modules, Xen must \"scrub\" them before handing the page over to the allocator. Unfortunately, it was discovered that modules will not be scrubbed on Arm.","status":"published","published":"2021-06-30T10:32:26Z","modified":"2024-08-03T21:47:33Z","updated_at":"2026-11-03T03:24:46.117926Z"}],"ghsa":[{"id":"GHSA-jpfw-vm34-2p3p","title":"xen/arm: Boot modules are not scrubbed The bootloader will load boot modules (e.g. kernel,...","description":"xen/arm: Boot modules are not scrubbed The bootloader will load boot modules (e.g. kernel, initramfs...) in a temporary area before they are copied by Xen to each domain memory. To ensure sensitive data is not leaked from the modules, Xen must \"scrub\" them before handing the page over to the allocator. Unfortunately, it was discovered that modules will not be scrubbed on Arm.","status":"published","published":"2022-05-24T19:06:40Z","modified":"2023-01-30T05:00:35Z","updated_at":"2026-11-02T14:46:14.069279Z"}],"nvd":[{"id":"CVE-2021-28693","description":"xen/arm: Boot modules are not scrubbed The bootloader will load boot modules (e.g. kernel, initramfs...) in a temporary area before they are copied by Xen to each domain memory. To ensure sensitive data is not leaked from the modules, Xen must \"scrub\" them before handing the page over to the allocator. Unfortunately, it was discovered that modules will not be scrubbed on Arm.","status":"published","published":"2021-06-30T11:15:08.117Z","modified":"2026-06-17T03:46:48.547Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":2.1,"vector":"AV:L/AC:L/Au:N/C:P/I:N/A:N","level":"low","assessor":"primary"}],"updated_at":"2026-11-02T14:06:55.259633Z"}],"osv":[{"id":"ALPINE-CVE-2021-28693","description":"xen/arm: Boot modules are not scrubbed The bootloader will load boot modules (e.g. kernel, initramfs...) in a temporary area before they are copied by Xen to each domain memory. To ensure sensitive data is not leaked from the modules, Xen must \"scrub\" them before handing the page over to the allocator. 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Unfortunately, it was discovered that modules will not be scrubbed on Arm.","status":"published","published":"2021-06-30T11:15:08.117Z","modified":"2026-03-15T22:37:00.942084Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:19.129331Z"},{"id":"DEBIAN-CVE-2021-28693","description":"xen/arm: Boot modules are not scrubbed The bootloader will load boot modules (e.g. kernel, initramfs...) in a temporary area before they are copied by Xen to each domain memory. To ensure sensitive data is not leaked from the modules, Xen must \"scrub\" them before handing the page over to the allocator. Unfortunately, it was discovered that modules will not be scrubbed on Arm.","status":"published","published":"2021-06-30T11:15:08.117Z","modified":"2026-10-23T18:03:28.898491429Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:45:34.94143Z"},{"id":"UBUNTU-CVE-2021-28693","description":"xen/arm: Boot modules are not scrubbed The bootloader will load boot modules (e.g. kernel, initramfs...) in a temporary area before they are copied by Xen to each domain memory. To ensure sensitive data is not leaked from the modules, Xen must \"scrub\" them before handing the page over to the allocator. Unfortunately, it was discovered that modules will not be scrubbed on Arm.","status":"published","published":"2021-06-30T11:15:00Z","modified":"2026-10-17T12:56:14.984901339Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:54:26.779273Z"},{"id":"openSUSE-SU-2021:1236-1","title":"Security update for xen","description":"This update for xen fixes the following issues:\n\nUpdate to Xen 4.13.3 general bug fix release (bsc#1027519).\n\nSecurity issues fixed:\n\n- CVE-2021-28693: xen/arm: Boot modules are not scrubbed (bsc#1186428)\n- CVE-2021-28692: xen: inappropriate x86 IOMMU timeout detection / handling (bsc#1186429)\n- CVE-2021-0089: xen: Speculative Code Store Bypass (bsc#1186433)\n- CVE-2021-28690: xen: x86: TSX Async Abort protections not restored after S3 (bsc#1186434)\n- CVE-2021-28694,CVE-2021-28695,CVE-2021-28696: IOMMU page mapping issues on x86 (XSA-378)(bsc#1189373).\n- CVE-2021-28697: grant table v2 status pages may remain accessible after de-allocation (XSA-379)(bsc#1189376).\n- CVE-2021-28698: long running loops in grant table handling (XSA-380)(bsc#1189378).\n- CVE-2021-28699: inadequate grant-v2 status frames array bounds check (XSA-382)(bsc#1189380).\n- CVE-2021-28700: No memory limit for dom0less domUs (XSA-383)(bsc#1189381).\n\nOther issues fixed:\n\n- Fixed 'Panic on CPU 0: IO-APIC + timer doesn't work!' (bsc#1180491)\n- Fixed an issue with xencommons, where file format expecations by fillup did not allign (bsc#1185682)\n- Fixed shell macro expansion in the spec file, so that ExecStart=\n  in xendomains-wait-disks.service is created correctly (bsc#1183877)\n- Upstream bug fixes (bsc#1027519)\n- Fixed Xen SLES11SP4 guest hangs on cluster (bsc#1188050).\n- xl monitoring process exits during xl save -p|-c keep the monitoring process running to cleanup the domU during shutdown (bsc#1176189).\n- Dom0 hangs when pinning CPUs for dom0 with HVM guest (bsc#1179246).\n- Prevent superpage allocation in the LAPIC and ACPI_INFO range (bsc#1189882).\n\nThis update was imported from the SUSE:SLE-15-SP2:Update update project.","status":"published","published":"2021-09-07T09:31:43Z","modified":"2026-02-04T02:28:33.693969Z","updated_at":"2026-11-02T16:58:32.266854Z"},{"id":"openSUSE-SU-2021:2923-1","title":"Security update for xen","description":"This update for xen fixes the following issues:\n\nUpdate to Xen 4.13.3 general bug fix release (bsc#1027519).\n\nSecurity issues fixed:\n\n- CVE-2021-28693: xen/arm: Boot modules are not scrubbed (bsc#1186428)\n- CVE-2021-28692: xen: inappropriate x86 IOMMU timeout detection / handling (bsc#1186429)\n- CVE-2021-0089: xen: Speculative Code Store Bypass (bsc#1186433)\n- CVE-2021-28690: xen: x86: TSX Async Abort protections not restored after S3 (bsc#1186434)\n- CVE-2021-28694,CVE-2021-28695,CVE-2021-28696: IOMMU page mapping issues on x86 (XSA-378)(bsc#1189373).\n- CVE-2021-28697: grant table v2 status pages may remain accessible after de-allocation (XSA-379)(bsc#1189376).\n- CVE-2021-28698: long running loops in grant table handling (XSA-380)(bsc#1189378).\n- CVE-2021-28699: inadequate grant-v2 status frames array bounds check (XSA-382)(bsc#1189380).\n- CVE-2021-28700: No memory limit for dom0less domUs (XSA-383)(bsc#1189381).\n\nOther issues fixed:\n\n- Fixed 'Panic on CPU 0: IO-APIC + timer doesn't work!' (bsc#1180491)\n- Fixed an issue with xencommons, where file format expecations by fillup did not allign (bsc#1185682)\n- Fixed shell macro expansion in the spec file, so that ExecStart=\n  in xendomains-wait-disks.service is created correctly (bsc#1183877)\n- Upstream bug fixes (bsc#1027519)\n- Fixed Xen SLES11SP4 guest hangs on cluster (bsc#1188050).\n- xl monitoring process exits during xl save -p|-c keep the monitoring process running to cleanup the domU during shutdown (bsc#1176189).\n- Dom0 hangs when pinning CPUs for dom0 with HVM guest (bsc#1179246).\n- Some long deprecated commands were finally removed in qemu6. Adjust libxl to use supported commands (bsc#1183243).\n- Update logrotate.conf, move global options into per-file sections to prevent globbering of global state (bsc#1187406).\n- Prevent superpage allocation in the LAPIC and ACPI_INFO range (bsc#1189882).\n","status":"published","published":"2021-09-02T08:11:37Z","modified":"2026-02-04T02:42:45.068919Z","updated_at":"2026-11-02T16:58:32.266854Z"},{"id":"SUSE-SU-2021:2922-1","title":"Security update for xen","description":"This update for xen fixes the following issues:\n\nUpdate to Xen 4.13.3 general bug fix release (bsc#1027519).\n\nSecurity issues fixed:\n\n- CVE-2021-28693: xen/arm: Boot modules are not scrubbed (bsc#1186428)\n- CVE-2021-28692: xen: inappropriate x86 IOMMU timeout detection / handling (bsc#1186429)\n- CVE-2021-0089: xen: Speculative Code Store Bypass (bsc#1186433)\n- CVE-2021-28690: xen: x86: TSX Async Abort protections not restored after S3 (bsc#1186434)\n- CVE-2021-28694,CVE-2021-28695,CVE-2021-28696: IOMMU page mapping issues on x86 (XSA-378)(bsc#1189373).\n- CVE-2021-28697: grant table v2 status pages may remain accessible after de-allocation (XSA-379)(bsc#1189376).\n- CVE-2021-28698: long running loops in grant table handling (XSA-380)(bsc#1189378).\n- CVE-2021-28699: inadequate grant-v2 status frames array bounds check (XSA-382)(bsc#1189380).\n- CVE-2021-28700: No memory limit for dom0less domUs (XSA-383)(bsc#1189381).\n\nOther issues fixed:\n\n- Fixed 'Panic on CPU 0: IO-APIC + timer doesn't work!' (bsc#1180491)\n- Fixed an issue with xencommons, where file format expecations by fillup did not allign (bsc#1185682)\n- Fixed shell macro expansion in the spec file, so that ExecStart=\n  in xendomains-wait-disks.service is created correctly (bsc#1183877)\n- Upstream bug fixes (bsc#1027519)\n- Fixed Xen SLES11SP4 guest hangs on cluster (bsc#1188050).\n- xl monitoring process exits during xl save -p|-c keep the monitoring process running to cleanup the domU during shutdown (bsc#1176189).\n- Dom0 hangs when pinning CPUs for dom0 with HVM guest (bsc#1179246).\n- Prevent superpage allocation in the LAPIC and ACPI_INFO range (bsc#1189882).\n","status":"published","published":"2021-09-02T08:10:22Z","modified":"2026-02-04T04:04:04.043961Z","updated_at":"2026-11-02T15:53:49.605187Z"},{"id":"SUSE-SU-2021:2923-1","title":"Security update for xen","description":"This update for xen fixes the following issues:\n\nUpdate to Xen 4.13.3 general bug fix release (bsc#1027519).\n\nSecurity issues fixed:\n\n- CVE-2021-28693: xen/arm: Boot modules are not scrubbed (bsc#1186428)\n- CVE-2021-28692: xen: inappropriate x86 IOMMU timeout detection / handling (bsc#1186429)\n- CVE-2021-0089: xen: Speculative Code Store Bypass (bsc#1186433)\n- CVE-2021-28690: xen: x86: TSX Async Abort protections not restored after S3 (bsc#1186434)\n- CVE-2021-28694,CVE-2021-28695,CVE-2021-28696: IOMMU page mapping issues on x86 (XSA-378)(bsc#1189373).\n- CVE-2021-28697: grant table v2 status pages may remain accessible after de-allocation (XSA-379)(bsc#1189376).\n- CVE-2021-28698: long running loops in grant table handling (XSA-380)(bsc#1189378).\n- CVE-2021-28699: inadequate grant-v2 status frames array bounds check (XSA-382)(bsc#1189380).\n- CVE-2021-28700: No memory limit for dom0less domUs (XSA-383)(bsc#1189381).\n\nOther issues fixed:\n\n- Fixed 'Panic on CPU 0: IO-APIC + timer doesn't work!' (bsc#1180491)\n- Fixed an issue with xencommons, where file format expecations by fillup did not allign (bsc#1185682)\n- Fixed shell macro expansion in the spec file, so that ExecStart=\n  in xendomains-wait-disks.service is created correctly (bsc#1183877)\n- Upstream bug fixes (bsc#1027519)\n- Fixed Xen SLES11SP4 guest hangs on cluster (bsc#1188050).\n- xl monitoring process exits during xl save -p|-c keep the monitoring process running to cleanup the domU during shutdown (bsc#1176189).\n- Dom0 hangs when pinning CPUs for dom0 with HVM guest (bsc#1179246).\n- Some long deprecated commands were finally removed in qemu6. Adjust libxl to use supported commands (bsc#1183243).\n- Update logrotate.conf, move global options into per-file sections to prevent globbering of global state (bsc#1187406).\n- Prevent superpage allocation in the LAPIC and ACPI_INFO range (bsc#1189882).\n","status":"published","published":"2021-09-02T08:11:36Z","modified":"2025-05-02T04:30:58.917642Z","updated_at":"2026-11-02T15:53:49.605187Z"},{"id":"SUSE-SU-2021:2924-1","title":"Security update for xen","description":"This update for xen fixes the following issues:\n\nSecurity issues fixed:\n\n- CVE-2021-28693: xen/arm: Boot modules are not scrubbed (bsc#1186428)\n- CVE-2021-28692: xen: inappropriate x86 IOMMU timeout detection / handling (bsc#1186429)\n- CVE-2021-0089: xen: Speculative Code Store Bypass (bsc#1186433)\n- CVE-2021-28690: xen: x86: TSX Async Abort protections not restored after S3 (bsc#1186434)\n- CVE-2021-20255: Fixed stack overflow via infinite recursion in eepro100 (bsc#1182654)\n- CVE-2021-28694,CVE-2021-28695,CVE-2021-28696: IOMMU page mapping issues on x86 (XSA-378)(bsc#1189373).\n- CVE-2021-28697: grant table v2 status pages may remain accessible after de-allocation (XSA-379)(bsc#1189376).\n- CVE-2021-28698: long running loops in grant table handling (XSA-380)(bsc#1189378).\n- CVE-2021-28699: inadequate grant-v2 status frames array bounds check (XSA-382)(bsc#1189380).\n- CVE-2021-28700: No memory limit for dom0less domUs (XSA-383)(bsc#1189381).\n- CVE-2021-3592: slirp: invalid pointer initialization may lead to information disclosure (bootp)(bsc#1187369).\n- CVE-2021-3594: slirp: invalid pointer initialization may lead to information disclosure (udp)(bsc#1187378).\n- CVE-2021-3595: slirp: invalid pointer initialization may lead to information disclosure (tftp)(bsc#1187376).\n\nOther issues fixed:\n\n- Fixed 'Panic on CPU 0: IO-APIC + timer doesn't work!' (bsc#1180491)\n- Fixed an issue with xencommons, where file format expecations by fillup did not allign (bsc#1185682)\n- Upstream bug fixes (bsc#1027519)\n\n- Dom0 hangs when pinning CPUs for dom0 with HVM guest (bsc#1179246).\n- Fixed Xen SLES11SP4 guest hangs on cluster (bsc#1188050).\n- Fixed PVHVM SLES12 SP5 - NMI Watchdog CPU Stuck (bsc#1180846).\n- Core cannot be opened when using xl dump-core of VM with PTF (bsc#1183243)\n- Prevent superpage allocation in the LAPIC and ACPI_INFO range (bsc#1189882).\n","status":"published","published":"2021-09-02T08:12:49Z","modified":"2026-02-04T04:33:23.775608Z","updated_at":"2026-11-02T15:53:49.605187Z"},{"id":"SUSE-SU-2021:2925-1","title":"Security update for xen","description":"This update for xen fixes the following issues:\n\nSecurity issues fixed:\n\n- CVE-2021-28693: xen/arm: Boot modules are not scrubbed (bsc#1186428)\n- CVE-2021-28692: xen: inappropriate x86 IOMMU timeout detection / handling (bsc#1186429)\n- CVE-2021-0089: xen: Speculative Code Store Bypass (bsc#1186433)\n- CVE-2021-28690: xen: x86: TSX Async Abort protections not restored after S3 (bsc#1186434)\n\n- CVE-2021-28694,CVE-2021-28695,CVE-2021-28696: IOMMU page mapping issues on x86 (XSA-378)(bsc#1189373).\n- CVE-2021-28697: grant table v2 status pages may remain accessible after de-allocation (XSA-379)(bsc#1189376).\n- CVE-2021-28698: long running loops in grant table handling (XSA-380)(bsc#1189378).\n- CVE-2021-28699: inadequate grant-v2 status frames array bounds check (XSA-382)(bsc#1189380).\n- CVE-2021-28700: No memory limit for dom0less domUs (XSA-383)(bsc#1189381).\n\nOther issues fixed:\n\n- Fixed 'Panic on CPU 0: IO-APIC + timer doesn't work!' (bsc#1180491)\n- Upstream bug fixes (bsc#1027519)\n- Dom0 hangs when pinning CPUs for dom0 with HVM guest (bsc#1179246).\n- Fixed Xen SLES11SP4 guest hangs on cluster (bsc#1188050).\n- Fixed PVHVM SLES12 SP5 - NMI Watchdog CPU Stuck (bsc#1180846).\n- Core cannot be opened when using xl dump-core of VM with PTF (bsc#1183243).\n- Prevent superpage allocation in the LAPIC and ACPI_INFO range (bsc#1189882).\n","status":"published","published":"2021-09-02T12:40:10Z","modified":"2026-02-04T02:13:33.615392Z","updated_at":"2026-11-02T15:53:49.605187Z"}]}}