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CVE-2021-28694

IOMMU page mapping issues on x86 T[his CNA information record relates to multiple CVEs; the text...

6.8 MediumFix available

IOMMU page mapping issues on x86 T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Both AMD and Intel allow ACPI tables to specify regions of memory which should be left untranslated, which typically means these addresses should pass the translation phase unaltered. While these are typically device specific ACPI properties, they can also be specified to apply to a range of devices, or even all devices. On all systems with such regions Xen failed to prevent guests from undoing/replacing such mappings (CVE-2021-28694). On AMD systems, where a discontinuous range is specified by firmware, the supposedly-excluded middle range will also be identity-mapped (CVE-2021-28695). Further, on AMD systems, upon de-assigment of a physical device from a guest, the identity mappings would be left in place, allowing a guest continued access to ranges of memory which it shouldn't have access to anymore (CVE-2021-28696).

Attack profile

How easy it is to exploit

Attack vector
Physical
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
High

Exploit likelihood

0.38%Unchanged since Aug 28, 2021
90%50%10%1%

What each source reports

NVD Score used 6.8

IOMMU page mapping issues on x86 T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Both AMD and Intel allow ACPI tables to specify regions of memory which should be left untranslated, which typically means these addresses should pass the translation phase unaltered. While these are typically device specific ACPI properties, they can also be specified to apply to a range of devices, or even all devices. On all systems with such regions Xen failed to prevent guests from undoing/replacing such mappings (CVE-2021-28694). On AMD systems, where a discontinuous range is specified by firmware, the supposedly-excluded middle range will also be identity-mapped (CVE-2021-28695). Further, on AMD systems, upon de-assigment of a physical device from a guest, the identity mappings would be left in place, allowing a guest continued access to ranges of memory which it shouldn't have access to anymore (CVE-2021-28696).

Record
CVE-2021-28694
CVSS 3.1
6.8 MediumCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0
4.6 MediumAV:L/AC:L/Au:N/C:P/I:P/A:P
Updated
2026-11-02
CVE List No score

IOMMU page mapping issues on x86 T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Both AMD and Intel allow ACPI tables to specify regions of memory which should be left untranslated, which typically means these addresses should pass the translation phase unaltered. While these are typically device specific ACPI properties, they can also be specified to apply to a range of devices, or even all devices. On all systems with such regions Xen failed to prevent guests from undoing/replacing such mappings (CVE-2021-28694). On AMD systems, where a discontinuous range is specified by firmware, the supposedly-excluded middle range will also be identity-mapped (CVE-2021-28695). Further, on AMD systems, upon de-assigment of a physical device from a guest, the identity mappings would be left in place, allowing a guest continued access to ranges of memory which it shouldn't have access to anymore (CVE-2021-28696).

Record
CVE-2021-28694
Updated
2026-11-02
EUVDEUVD-2021-15351 No score

IOMMU page mapping issues on x86 T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Both AMD and Intel allow ACPI tables to specify regions of memory which should be left untranslated, which typically means these addresses should pass the translation phase unaltered. While these are typically device specific ACPI properties, they can also be specified to apply to a range of devices, or even all devices. On all systems with such regions Xen failed to prevent guests from undoing/replacing such mappings (CVE-2021-28694). On AMD systems, where a discontinuous range is specified by firmware, the supposedly-excluded middle range will also be identity-mapped (CVE-2021-28695). Further, on AMD systems, upon de-assigment of a physical device from a guest, the identity mappings would be left in place, allowing a guest continued access to ranges of memory which it shouldn't have access to anymore (CVE-2021-28696).

Record
EUVD-2021-15351
Updated
2026-11-03
GitHub AdvisoriesGHSA-7h6m-rq82-825p 6.8

IOMMU page mapping issues on x86 T[his CNA information record relates to multiple CVEs; the text...

IOMMU page mapping issues on x86 T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Both AMD and Intel allow ACPI tables to specify regions of memory which should be left untranslated, which typically means these addresses should pass the translation phase unaltered. While these are typically device specific ACPI properties, they can also be specified to apply to a range of devices, or even all devices. On all systems with such regions Xen failed to prevent guests from undoing/replacing such mappings (CVE-2021-28694). On AMD systems, where a discontinuous range is specified by firmware, the supposedly-excluded middle range will also be identity-mapped (CVE-2021-28695). Further, on AMD systems, upon de-assigment of a physical device from a guest, the identity mappings would be left in place, allowing a guest continued access to ranges of memory which it shouldn't have access to anymore (CVE-2021-28696).

Record
GHSA-7h6m-rq82-825p
CVSS 3.1
6.8 MediumCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness
CWE-287
Updated
2026-11-02
OSVALPINE-CVE-2021-28694 6.8

IOMMU page mapping issues on x86 T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Both AMD and Intel allow ACPI tables to specify regions of memory which should be left untranslated, which typically means these addresses should pass the translation phase unaltered. While these are typically device specific ACPI properties, they can also be specified to apply to a range of devices, or even all devices. On all systems with such regions Xen failed to prevent guests from undoing/replacing such mappings (CVE-2021-28694). On AMD systems, where a discontinuous range is specified by firmware, the supposedly-excluded middle range will also be identity-mapped (CVE-2021-28695). Further, on AMD systems, upon de-assigment of a physical device from a guest, the identity mappings would be left in place, allowing a guest continued access to ranges of memory which it shouldn't have access to anymore (CVE-2021-28696).

Record
ALPINE-CVE-2021-28694
CVSS 3.1
6.8 MediumCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSV 6.8

IOMMU page mapping issues on x86 T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Both AMD and Intel allow ACPI tables to specify regions of memory which should be left untranslated, which typically means these addresses should pass the translation phase unaltered. While these are typically device specific ACPI properties, they can also be specified to apply to a range of devices, or even all devices. On all systems with such regions Xen failed to prevent guests from undoing/replacing such mappings (CVE-2021-28694). On AMD systems, where a discontinuous range is specified by firmware, the supposedly-excluded middle range will also be identity-mapped (CVE-2021-28695). Further, on AMD systems, upon de-assigment of a physical device from a guest, the identity mappings would be left in place, allowing a guest continued access to ranges of memory which it shouldn't have access to anymore (CVE-2021-28696).

Record
CVE-2021-28694
CVSS 3.1
6.8 MediumCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
Show 12 moreShow less
OSVDEBIAN-CVE-2021-28694 6.8

IOMMU page mapping issues on x86 T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Both AMD and Intel allow ACPI tables to specify regions of memory which should be left untranslated, which typically means these addresses should pass the translation phase unaltered. While these are typically device specific ACPI properties, they can also be specified to apply to a range of devices, or even all devices. On all systems with such regions Xen failed to prevent guests from undoing/replacing such mappings (CVE-2021-28694). On AMD systems, where a discontinuous range is specified by firmware, the supposedly-excluded middle range will also be identity-mapped (CVE-2021-28695). Further, on AMD systems, upon de-assigment of a physical device from a guest, the identity mappings would be left in place, allowing a guest continued access to ranges of memory which it shouldn't have access to anymore (CVE-2021-28696).

Record
DEBIAN-CVE-2021-28694
CVSS 3.1
6.8 MediumCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2021-28694 6.8

IOMMU page mapping issues on x86 T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Both AMD and Intel allow ACPI tables to specify regions of memory which should be left untranslated, which typically means these addresses should pass the translation phase unaltered. While these are typically device specific ACPI properties, they can also be specified to apply to a range of devices, or even all devices. On all systems with such regions Xen failed to prevent guests from undoing/replacing such mappings (CVE-2021-28694). On AMD systems, where a discontinuous range is specified by firmware, the supposedly-excluded middle range will also be identity-mapped (CVE-2021-28695). Further, on AMD systems, upon de-assigment of a physical device from a guest, the identity mappings would be left in place, allowing a guest continued access to ranges of memory which it shouldn't have access to anymore (CVE-2021-28696).

Record
UBUNTU-CVE-2021-28694
CVSS 3.1
6.8 MediumCVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Updated
2026-11-02
OSVopenSUSE-SU-2021:1236-1 No score

Security update for xen

This update for xen fixes the following issues:

Update to Xen 4.13.3 general bug fix release (bsc#1027519).

Security issues fixed:

  • CVE-2021-28693: xen/arm: Boot modules are not scrubbed (bsc#1186428)
  • CVE-2021-28692: xen: inappropriate x86 IOMMU timeout detection / handling (bsc#1186429)
  • CVE-2021-0089: xen: Speculative Code Store Bypass (bsc#1186433)
  • CVE-2021-28690: xen: x86: TSX Async Abort protections not restored after S3 (bsc#1186434)
  • CVE-2021-28694,CVE-2021-28695,CVE-2021-28696: IOMMU page mapping issues on x86 (XSA-378)(bsc#1189373).
  • CVE-2021-28697: grant table v2 status pages may remain accessible after de-allocation (XSA-379)(bsc#1189376).
  • CVE-2021-28698: long running loops in grant table handling (XSA-380)(bsc#1189378).
  • CVE-2021-28699: inadequate grant-v2 status frames array bounds check (XSA-382)(bsc#1189380).
  • CVE-2021-28700: No memory limit for dom0less domUs (XSA-383)(bsc#1189381).

Other issues fixed:

  • Fixed 'Panic on CPU 0: IO-APIC + timer doesn't work!' (bsc#1180491)
  • Fixed an issue with xencommons, where file format expecations by fillup did not allign (bsc#1185682)
  • Fixed shell macro expansion in the spec file, so that ExecStart= in xendomains-wait-disks.service is created correctly (bsc#1183877)
  • Upstream bug fixes (bsc#1027519)
  • Fixed Xen SLES11SP4 guest hangs on cluster (bsc#1188050).
  • xl monitoring process exits during xl save -p|-c keep the monitoring process running to cleanup the domU during shutdown (bsc#1176189).
  • Dom0 hangs when pinning CPUs for dom0 with HVM guest (bsc#1179246).
  • Prevent superpage allocation in the LAPIC and ACPI_INFO range (bsc#1189882).

This update was imported from the SUSE:SLE-15-SP2:Update update project.

Record
openSUSE-SU-2021:1236-1
Updated
2026-11-02
OSVopenSUSE-SU-2021:2923-1 No score

Security update for xen

This update for xen fixes the following issues:

Update to Xen 4.13.3 general bug fix release (bsc#1027519).

Security issues fixed:

  • CVE-2021-28693: xen/arm: Boot modules are not scrubbed (bsc#1186428)
  • CVE-2021-28692: xen: inappropriate x86 IOMMU timeout detection / handling (bsc#1186429)
  • CVE-2021-0089: xen: Speculative Code Store Bypass (bsc#1186433)
  • CVE-2021-28690: xen: x86: TSX Async Abort protections not restored after S3 (bsc#1186434)
  • CVE-2021-28694,CVE-2021-28695,CVE-2021-28696: IOMMU page mapping issues on x86 (XSA-378)(bsc#1189373).
  • CVE-2021-28697: grant table v2 status pages may remain accessible after de-allocation (XSA-379)(bsc#1189376).
  • CVE-2021-28698: long running loops in grant table handling (XSA-380)(bsc#1189378).
  • CVE-2021-28699: inadequate grant-v2 status frames array bounds check (XSA-382)(bsc#1189380).
  • CVE-2021-28700: No memory limit for dom0less domUs (XSA-383)(bsc#1189381).

Other issues fixed:

  • Fixed 'Panic on CPU 0: IO-APIC + timer doesn't work!' (bsc#1180491)
  • Fixed an issue with xencommons, where file format expecations by fillup did not allign (bsc#1185682)
  • Fixed shell macro expansion in the spec file, so that ExecStart= in xendomains-wait-disks.service is created correctly (bsc#1183877)
  • Upstream bug fixes (bsc#1027519)
  • Fixed Xen SLES11SP4 guest hangs on cluster (bsc#1188050).
  • xl monitoring process exits during xl save -p|-c keep the monitoring process running to cleanup the domU during shutdown (bsc#1176189).
  • Dom0 hangs when pinning CPUs for dom0 with HVM guest (bsc#1179246).
  • Some long deprecated commands were finally removed in qemu6. Adjust libxl to use supported commands (bsc#1183243).
  • Update logrotate.conf, move global options into per-file sections to prevent globbering of global state (bsc#1187406).
  • Prevent superpage allocation in the LAPIC and ACPI_INFO range (bsc#1189882).
Record
openSUSE-SU-2021:2923-1
Updated
2026-11-02
OSVSUSE-SU-2021:2922-1 No score

Security update for xen

This update for xen fixes the following issues:

Update to Xen 4.13.3 general bug fix release (bsc#1027519).

Security issues fixed:

  • CVE-2021-28693: xen/arm: Boot modules are not scrubbed (bsc#1186428)
  • CVE-2021-28692: xen: inappropriate x86 IOMMU timeout detection / handling (bsc#1186429)
  • CVE-2021-0089: xen: Speculative Code Store Bypass (bsc#1186433)
  • CVE-2021-28690: xen: x86: TSX Async Abort protections not restored after S3 (bsc#1186434)
  • CVE-2021-28694,CVE-2021-28695,CVE-2021-28696: IOMMU page mapping issues on x86 (XSA-378)(bsc#1189373).
  • CVE-2021-28697: grant table v2 status pages may remain accessible after de-allocation (XSA-379)(bsc#1189376).
  • CVE-2021-28698: long running loops in grant table handling (XSA-380)(bsc#1189378).
  • CVE-2021-28699: inadequate grant-v2 status frames array bounds check (XSA-382)(bsc#1189380).
  • CVE-2021-28700: No memory limit for dom0less domUs (XSA-383)(bsc#1189381).

Other issues fixed:

  • Fixed 'Panic on CPU 0: IO-APIC + timer doesn't work!' (bsc#1180491)
  • Fixed an issue with xencommons, where file format expecations by fillup did not allign (bsc#1185682)
  • Fixed shell macro expansion in the spec file, so that ExecStart= in xendomains-wait-disks.service is created correctly (bsc#1183877)
  • Upstream bug fixes (bsc#1027519)
  • Fixed Xen SLES11SP4 guest hangs on cluster (bsc#1188050).
  • xl monitoring process exits during xl save -p|-c keep the monitoring process running to cleanup the domU during shutdown (bsc#1176189).
  • Dom0 hangs when pinning CPUs for dom0 with HVM guest (bsc#1179246).
  • Prevent superpage allocation in the LAPIC and ACPI_INFO range (bsc#1189882).
Record
SUSE-SU-2021:2922-1
Updated
2026-11-02
OSVSUSE-SU-2021:2923-1 No score

Security update for xen

This update for xen fixes the following issues:

Update to Xen 4.13.3 general bug fix release (bsc#1027519).

Security issues fixed:

  • CVE-2021-28693: xen/arm: Boot modules are not scrubbed (bsc#1186428)
  • CVE-2021-28692: xen: inappropriate x86 IOMMU timeout detection / handling (bsc#1186429)
  • CVE-2021-0089: xen: Speculative Code Store Bypass (bsc#1186433)
  • CVE-2021-28690: xen: x86: TSX Async Abort protections not restored after S3 (bsc#1186434)
  • CVE-2021-28694,CVE-2021-28695,CVE-2021-28696: IOMMU page mapping issues on x86 (XSA-378)(bsc#1189373).
  • CVE-2021-28697: grant table v2 status pages may remain accessible after de-allocation (XSA-379)(bsc#1189376).
  • CVE-2021-28698: long running loops in grant table handling (XSA-380)(bsc#1189378).
  • CVE-2021-28699: inadequate grant-v2 status frames array bounds check (XSA-382)(bsc#1189380).
  • CVE-2021-28700: No memory limit for dom0less domUs (XSA-383)(bsc#1189381).

Other issues fixed:

  • Fixed 'Panic on CPU 0: IO-APIC + timer doesn't work!' (bsc#1180491)
  • Fixed an issue with xencommons, where file format expecations by fillup did not allign (bsc#1185682)
  • Fixed shell macro expansion in the spec file, so that ExecStart= in xendomains-wait-disks.service is created correctly (bsc#1183877)
  • Upstream bug fixes (bsc#1027519)
  • Fixed Xen SLES11SP4 guest hangs on cluster (bsc#1188050).
  • xl monitoring process exits during xl save -p|-c keep the monitoring process running to cleanup the domU during shutdown (bsc#1176189).
  • Dom0 hangs when pinning CPUs for dom0 with HVM guest (bsc#1179246).
  • Some long deprecated commands were finally removed in qemu6. Adjust libxl to use supported commands (bsc#1183243).
  • Update logrotate.conf, move global options into per-file sections to prevent globbering of global state (bsc#1187406).
  • Prevent superpage allocation in the LAPIC and ACPI_INFO range (bsc#1189882).
Record
SUSE-SU-2021:2923-1
Updated
2026-11-02
OSVSUSE-SU-2021:2924-1 No score

Security update for xen

This update for xen fixes the following issues:

Security issues fixed:

  • CVE-2021-28693: xen/arm: Boot modules are not scrubbed (bsc#1186428)
  • CVE-2021-28692: xen: inappropriate x86 IOMMU timeout detection / handling (bsc#1186429)
  • CVE-2021-0089: xen: Speculative Code Store Bypass (bsc#1186433)
  • CVE-2021-28690: xen: x86: TSX Async Abort protections not restored after S3 (bsc#1186434)
  • CVE-2021-20255: Fixed stack overflow via infinite recursion in eepro100 (bsc#1182654)
  • CVE-2021-28694,CVE-2021-28695,CVE-2021-28696: IOMMU page mapping issues on x86 (XSA-378)(bsc#1189373).
  • CVE-2021-28697: grant table v2 status pages may remain accessible after de-allocation (XSA-379)(bsc#1189376).
  • CVE-2021-28698: long running loops in grant table handling (XSA-380)(bsc#1189378).
  • CVE-2021-28699: inadequate grant-v2 status frames array bounds check (XSA-382)(bsc#1189380).
  • CVE-2021-28700: No memory limit for dom0less domUs (XSA-383)(bsc#1189381).
  • CVE-2021-3592: slirp: invalid pointer initialization may lead to information disclosure (bootp)(bsc#1187369).
  • CVE-2021-3594: slirp: invalid pointer initialization may lead to information disclosure (udp)(bsc#1187378).
  • CVE-2021-3595: slirp: invalid pointer initialization may lead to information disclosure (tftp)(bsc#1187376).

Other issues fixed:

  • Fixed 'Panic on CPU 0: IO-APIC + timer doesn't work!' (bsc#1180491)

  • Fixed an issue with xencommons, where file format expecations by fillup did not allign (bsc#1185682)

  • Upstream bug fixes (bsc#1027519)

  • Dom0 hangs when pinning CPUs for dom0 with HVM guest (bsc#1179246).

  • Fixed Xen SLES11SP4 guest hangs on cluster (bsc#1188050).

  • Fixed PVHVM SLES12 SP5 - NMI Watchdog CPU Stuck (bsc#1180846).

  • Core cannot be opened when using xl dump-core of VM with PTF (bsc#1183243)

  • Prevent superpage allocation in the LAPIC and ACPI_INFO range (bsc#1189882).

Record
SUSE-SU-2021:2924-1
Updated
2026-11-02
OSVSUSE-SU-2021:2925-1 No score

Security update for xen

This update for xen fixes the following issues:

Security issues fixed:

  • CVE-2021-28693: xen/arm: Boot modules are not scrubbed (bsc#1186428)

  • CVE-2021-28692: xen: inappropriate x86 IOMMU timeout detection / handling (bsc#1186429)

  • CVE-2021-0089: xen: Speculative Code Store Bypass (bsc#1186433)

  • CVE-2021-28690: xen: x86: TSX Async Abort protections not restored after S3 (bsc#1186434)

  • CVE-2021-28694,CVE-2021-28695,CVE-2021-28696: IOMMU page mapping issues on x86 (XSA-378)(bsc#1189373).

  • CVE-2021-28697: grant table v2 status pages may remain accessible after de-allocation (XSA-379)(bsc#1189376).

  • CVE-2021-28698: long running loops in grant table handling (XSA-380)(bsc#1189378).

  • CVE-2021-28699: inadequate grant-v2 status frames array bounds check (XSA-382)(bsc#1189380).

  • CVE-2021-28700: No memory limit for dom0less domUs (XSA-383)(bsc#1189381).

Other issues fixed:

  • Fixed 'Panic on CPU 0: IO-APIC + timer doesn't work!' (bsc#1180491)
  • Upstream bug fixes (bsc#1027519)
  • Dom0 hangs when pinning CPUs for dom0 with HVM guest (bsc#1179246).
  • Fixed Xen SLES11SP4 guest hangs on cluster (bsc#1188050).
  • Fixed PVHVM SLES12 SP5 - NMI Watchdog CPU Stuck (bsc#1180846).
  • Core cannot be opened when using xl dump-core of VM with PTF (bsc#1183243).
  • Prevent superpage allocation in the LAPIC and ACPI_INFO range (bsc#1189882).
Record
SUSE-SU-2021:2925-1
Updated
2026-11-02
OSVSUSE-SU-2021:2943-1 No score

Security update for xen

This update for xen fixes the following issues:

  • CVE-2021-28698: long running loops in grant table handling (XSA-380)(bsc#1189378).

  • CVE-2021-28692: xen: inappropriate x86 IOMMU timeout detection / handling (bsc#1186429).

  • CVE-2021-0089: xen: Speculative Code Store Bypass (bsc#1186433).

  • CVE-2021-28699: inadequate grant-v2 status frames array bounds check (XSA-382)(bsc#1189380).

  • CVE-2021-28694,CVE-2021-28695,CVE-2021-28696: IOMMU page mapping issues on x86 (XSA-378)(bsc#1189373).

  • CVE-2021-28697: grant table v2 status pages may remain accessible after de-allocation (XSA-379)(bsc#1189376).

  • CVE-2021-28690: xen: x86: TSX Async Abort protections not restored after S3 (bsc#1186434).

  • Prevent superpage allocation in the LAPIC and ACPI_INFO range (bsc#1189882).

Record
SUSE-SU-2021:2943-1
Updated
2026-11-02
OSVSUSE-SU-2021:2955-1 No score

Security update for xen

This update for xen fixes the following issues:

Security issues fixed:

  • CVE-2021-28698: long running loops in grant table handling (XSA-380)(bsc#1189378).

  • CVE-2021-28697: grant table v2 status pages may remain accessible after de-allocation (XSA-379)(bsc#1189376).

  • CVE-2021-28694,CVE-2021-28695,CVE-2021-28696: IOMMU page mapping issues on x86 (XSA-378)(bsc#1189373).

  • CVE-2021-28699: inadequate grant-v2 status frames array bounds check (XSA-382)(bsc#1189380).

  • CVE-2021-28692: xen: inappropriate x86 IOMMU timeout detection / handling (bsc#1186429)

  • CVE-2021-28690: xen: x86: TSX Async Abort protections not restored after S3 (bsc#1186434)

  • CVE-2021-0089: xen: Speculative Code Store Bypass (bsc#1186433)

  • CVE-2021-20255: Fixed stack overflow via infinite recursion in eepro100 (bsc#1182654)

  • CVE-2021-3592: slirp: invalid pointer initialization may lead to information disclosure (bootp)(bsc#1187369).

  • CVE-2021-3594: slirp: invalid pointer initialization may lead to information disclosure (udp)(bsc#1187378).

  • CVE-2021-3595: slirp: invalid pointer initialization may lead to information disclosure (tftp)(bsc#1187376).

  • CVE-2021-3308: Fixed IRQ vector leak on x86 (XSA-360)(bsc#1181254).

  • Prevent superpage allocation in the LAPIC and ACPI_INFO range (bsc#1189882).

Record
SUSE-SU-2021:2955-1
Updated
2026-11-02
OSVSUSE-SU-2021:2957-1 No score

Security update for xen

This update for xen fixes the following issues:

  • CVE-2021-3594: slirp: invalid pointer initialization may lead to information disclosure (udp)(bsc#1187378).

  • CVE-2021-3595: slirp: invalid pointer initialization may lead to information disclosure (tftp)(bsc#1187376).

  • CVE-2021-28698: long running loops in grant table handling (XSA-380)(bsc#1189378).

  • CVE-2021-28699: inadequate grant-v2 status frames array bounds check (XSA-382)(bsc#1189380).

  • CVE-2021-20255: Fixed stack overflow via infinite recursion in eepro100 (bsc#1182654)

  • CVE-2021-28690: xen: x86: TSX Async Abort protections not restored after S3 (bsc#1186434)

  • CVE-2021-28692: xen: inappropriate x86 IOMMU timeout detection / handling (bsc#1186429)

  • CVE-2021-28694,CVE-2021-28695,CVE-2021-28696: IOMMU page mapping issues on x86 (XSA-378)(bsc#1189373).

  • CVE-2021-0089: xen: Speculative Code Store Bypass (bsc#1186433)

  • CVE-2021-28697: grant table v2 status pages may remain accessible after de-allocation (XSA-379)(bsc#1189376).

  • CVE-2021-3592: slirp: invalid pointer initialization may lead to information disclosure (bootp)(bsc#1187369).

  • Prevent superpage allocation in the LAPIC and ACPI_INFO range (bsc#1189882).

Record
SUSE-SU-2021:2957-1
Updated
2026-11-02
OSVSUSE-SU-2021:3322-1 No score

Security update for xen

This update for xen fixes the following issues:

  • CVE-2021-28701: Fixed race condition in XENMAPSPACE_grant_table handling (XSA-384) (bsc#1189632).

  • CVE-2021-28694,CVE-2021-28695,CVE-2021-28696: Fixed IOMMU page mapping issues on x86 (XSA-378)(bsc#1189373).

  • CVE-2021-28697: Fixed grant table v2 status pages that may remain accessible after de-allocation (XSA-379)(bsc#1189376).

  • CVE-2021-28698: Fixed long running loops in grant table handling (XSA-380)(bsc#1189378).

  • CVE-2021-20255: Fixed eepro100 stack overflow via infinite recursion (bsc#1182654).

  • CVE-2021-3592: Fixed invalid pointer initialization may lead to information disclosure (bootp) (bsc#1187369).

  • CVE-2021-3594: Fixed invalid pointer initialization may lead to information disclosure (udp) (bsc#1187378).

  • CVE-2021-3595: Fixed invalid pointer initialization may lead to information disclosure (tftp) (bsc#1187376).

  • CVE-2021-28692: Fixed inappropriate x86 IOMMU timeout detection / handling (XSA-373)(bsc#1186429).

  • CVE-2021-0089: Fixed Speculative Code Store Bypass (XSA-375)(bsc#1186433).

  • CVE-2021-28690: Fixed x86 TSX Async Abort protections not restored after S3 (XSA-377)(bsc#1186434).

  • Prevent superpage allocation in the LAPIC and ACPI_INFO range (bsc#1189882).

Record
SUSE-SU-2021:3322-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
xen
Alpine:v3.11
 before 4.13.3-r2
4.13.3-r2
xen
Alpine:v3.12
 before 4.13.3-r2
4.13.3-r2
xen
Alpine:v3.13
 before 4.14.2-r0
4.14.2-r0
xen
Alpine:v3.14
 before 4.15.0-r2
4.15.0-r2
xen
Alpine:v3.15
 before 4.15.0-r2
4.15.0-r2
xen
Alpine:v3.16
 before 4.15.0-r2
4.15.0-r2
xen
Alpine:v3.17
 before 4.15.0-r2
4.15.0-r2
xen
Alpine:v3.18
 before 4.15.0-r2
4.15.0-r2
xen
Alpine:v3.19
 before 4.15.0-r2
4.15.0-r2
xen
Alpine:v3.20
 before 4.15.0-r2
4.15.0-r2
Show 49 moreShow less
Affected packages
PackageAffectedFixed
xen
Alpine:v3.21
 before 4.15.0-r2
4.15.0-r2
xen
Alpine:v3.22
 before 4.15.0-r2
4.15.0-r2
xen
Alpine:v3.23
 before 4.15.0-r2
4.15.0-r2
xen
Alpine:v3.24
 before 4.15.0-r2
4.15.0-r2
xen
Debian:12
 before 4.14.3-1
4.14.3-1
xen
Debian:13
 before 4.14.3-1
4.14.3-1
xen
Debian:14
 before 4.14.3-1
4.14.3-1
xen
Debian:11
From an advisory covering 8 CVEs
 before 4.14.3-1~deb11u1, plus listed versions
4.14.2+25-gb6a8c4f72d-2
4.14.3-1~deb11u1
xen
SUSE:Linux Enterprise Module for Basesystem 15 SP2
From an advisory covering 11 CVEs
 before 4.13.3_02-3.34.1
4.13.3_02-3.34.1
xen
SUSE:Linux Enterprise Module for Server Applications 15 SP2
From an advisory covering 11 CVEs
 before 4.13.3_02-3.34.1
4.13.3_02-3.34.1
xen
SUSE:Linux Enterprise Micro 5.0
From an advisory covering 11 CVEs
 before 4.13.3_02-3.34.1
4.13.3_02-3.34.1
xen
SUSE:Linux Enterprise Module for Basesystem 15 SP3
From an advisory covering 11 CVEs
 before 4.14.2_04-3.9.1
4.14.2_04-3.9.1
xen
SUSE:Linux Enterprise Module for Server Applications 15 SP3
From an advisory covering 11 CVEs
 before 4.14.2_04-3.9.1
4.14.2_04-3.9.1
xen
SUSE:Linux Enterprise Software Development Kit 12 SP5
From an advisory covering 15 CVEs
 before 4.12.4_12-3.49.1
4.12.4_12-3.49.1
xen
SUSE:Linux Enterprise Server 12 SP5
From an advisory covering 15 CVEs
 before 4.12.4_12-3.49.1
4.12.4_12-3.49.1
xen
SUSE:Linux Enterprise Server for SAP Applications 12 SP5
From an advisory covering 15 CVEs
 before 4.12.4_12-3.49.1
4.12.4_12-3.49.1
xen
SUSE:Linux Enterprise High Performance Computing 15 SP1-ESPOS
From an advisory covering 11 CVEs
 before 4.12.4_12-3.52.1
4.12.4_12-3.52.1
xen
SUSE:Linux Enterprise High Performance Computing 15 SP1-LTSS
From an advisory covering 11 CVEs
 before 4.12.4_12-3.52.1
4.12.4_12-3.52.1
xen
SUSE:Linux Enterprise Server 15 SP1-BCL
From an advisory covering 11 CVEs
 before 4.12.4_12-3.52.1
4.12.4_12-3.52.1
xen
SUSE:Linux Enterprise Server 15 SP1-LTSS
From an advisory covering 11 CVEs
 before 4.12.4_12-3.52.1
4.12.4_12-3.52.1
xen
SUSE:Linux Enterprise Server for SAP Applications 15 SP1
From an advisory covering 11 CVEs
 before 4.12.4_12-3.52.1
4.12.4_12-3.52.1
xen
SUSE:Manager Proxy 4.0
From an advisory covering 11 CVEs
 before 4.12.4_12-3.52.1
4.12.4_12-3.52.1
xen
SUSE:Manager Retail Branch Server 4.0
From an advisory covering 11 CVEs
 before 4.12.4_12-3.52.1
4.12.4_12-3.52.1
xen
SUSE:Manager Server 4.0
From an advisory covering 11 CVEs
 before 4.12.4_12-3.52.1
4.12.4_12-3.52.1
xen
SUSE:Enterprise Storage 6
From an advisory covering 11 CVEs
 before 4.12.4_12-3.52.1
4.12.4_12-3.52.1
xen
SUSE:Linux Enterprise High Performance Computing 15-ESPOS
From an advisory covering 9 CVEs
 before 4.10.4_26-3.61.1
4.10.4_26-3.61.1
xen
SUSE:Linux Enterprise High Performance Computing 15-LTSS
From an advisory covering 9 CVEs
 before 4.10.4_26-3.61.1
4.10.4_26-3.61.1
xen
SUSE:Linux Enterprise Server for SAP Applications 15
From an advisory covering 9 CVEs
 before 4.10.4_26-3.61.1
4.10.4_26-3.61.1
xen
SUSE:OpenStack Cloud 9
From an advisory covering 14 CVEs
 before 4.11.4_20-2.60.1
4.11.4_20-2.60.1
xen
SUSE:OpenStack Cloud Crowbar 9
From an advisory covering 14 CVEs
 before 4.11.4_20-2.60.1
4.11.4_20-2.60.1
xen
SUSE:Linux Enterprise Server for SAP Applications 12 SP4
From an advisory covering 14 CVEs
 before 4.11.4_20-2.60.1
4.11.4_20-2.60.1
xen
SUSE:Linux Enterprise Server 12 SP4-LTSS
From an advisory covering 14 CVEs
 before 4.11.4_20-2.60.1
4.11.4_20-2.60.1
xen
SUSE:HPE Helion OpenStack 8
From an advisory covering 13 CVEs
 before 4.9.4_20-3.91.1
4.9.4_20-3.91.1
xen
SUSE:OpenStack Cloud 8
From an advisory covering 13 CVEs
 before 4.9.4_20-3.91.1
4.9.4_20-3.91.1
xen
SUSE:OpenStack Cloud Crowbar 8
From an advisory covering 13 CVEs
 before 4.9.4_20-3.91.1
4.9.4_20-3.91.1
xen
SUSE:Linux Enterprise Server for SAP Applications 12 SP3
From an advisory covering 13 CVEs
 before 4.9.4_20-3.91.1
4.9.4_20-3.91.1
xen
SUSE:Linux Enterprise Server 12 SP3-LTSS
From an advisory covering 13 CVEs
 before 4.9.4_20-3.91.1
4.9.4_20-3.91.1
xen
SUSE:Linux Enterprise Server 12 SP3-BCL
From an advisory covering 13 CVEs
 before 4.9.4_20-3.91.1
4.9.4_20-3.91.1
xen
SUSE:Linux Enterprise Server 12 SP2-BCL
From an advisory covering 13 CVEs
 before 4.7.6_16-43.79.5
4.7.6_16-43.79.5
xen
Ubuntu:16.04:LTS
 All versions, plus listed versions
4.5.1-0ubuntu14.5.1-0ubuntu24.6.0-1ubuntu14.6.0-1ubuntu24.6.0-1ubuntu4
Show 7 moreShow less
4.6.0-1ubuntu4.14.6.0-1ubuntu4.24.6.0-1ubuntu4.34.6.5-0ubuntu14.6.5-0ubuntu1.14.6.5-0ubuntu1.24.6.5-0ubuntu1.4
 None known
xen
Ubuntu:18.04:LTS
 All versions, plus listed versions
4.9.0-0ubuntu34.9.0-0ubuntu44.9.2-0ubuntu1
 None known
xen
Ubuntu:20.04:LTS
 All versions, plus listed versions
4.9.2-0ubuntu24.9.2-0ubuntu64.9.2-0ubuntu74.11.3+24-g14b62ab3e5-1ubuntu14.11.3+24-g14b62ab3e5-1ubuntu24.11.3+24-g14b62ab3e5-1ubuntu2.24.11.3+24-g14b62ab3e5-1ubuntu2.3
 None known
xen
Ubuntu:22.04:LTS
 All versions, plus listed versions
4.11.4+24-gddaaccbbab-1ubuntu24.16.0-1~ubuntu24.16.0-1~ubuntu2.1
 None known
xen
Ubuntu:24.04:LTS
 All versions, plus listed versions
4.17.2-14.17.2+55-g0b56bed864-14.17.2+76-ge1f9cb16e2-14.17.2+76-ge1f9cb16e2-1ubuntu14.17.3+10-g091466ba55-14.17.3+10-g091466ba55-1.1ubuntu24.17.3+10-g091466ba55-1.1ubuntu3
 None known
xen
Ubuntu:25.10
 All versions, plus listed versions
4.20.0-1ubuntu14.20.0+68-g35cb38b222-1
 None known
xen
Ubuntu:26.10
 All versions, plus listed versions
4.20.2+7-g1badcf5035-2build24.20.2+37-g61ff35323e-1ubuntu14.20.3+127-gc42374a105-1
 None known
xen
Ubuntu:26.04:LTS
 All versions, plus listed versions
4.20.0+68-g35cb38b222-14.20.2+7-g1badcf5035-24.20.2+7-g1badcf5035-2build2
 None known
xen
openSUSE:Leap 15.2
From an advisory covering 11 CVEs
 before 4.13.3_02-lp152.2.27.1
4.13.3_02-lp152.2.27.1
xen
openSUSE:Leap 15.3
From an advisory covering 11 CVEs
 before 4.14.2_04-3.9.1
4.14.2_04-3.9.1

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2021-28694 is a medium vulnerability (CVSS 6.8) in Xen, published August 27, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.38%, the 32nd percentile. Fixed in xen 4.13.3-r2.

References

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