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CVE-2021-28693

xen/arm: Boot modules are not scrubbed The bootloader will load boot modules (e.g. kernel,...

5.5 MediumFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
Low
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
None
Availability
None

Exploit likelihood

0.32%Down 0.1 points since Jul 1, 2021
90%50%10%1%

What each source reports

NVD Score used 5.5

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.

Record
CVE-2021-28693
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS 2.0
2.1 LowAV:L/AC:L/Au:N/C:P/I:N/A:N
Updated
2026-11-02
CVE List No score

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.

Record
CVE-2021-28693
Updated
2026-11-02
EUVDEUVD-2021-15350 No score

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.

Record
EUVD-2021-15350
Updated
2026-11-03
GitHub AdvisoriesGHSA-jpfw-vm34-2p3p No score

xen/arm: Boot modules are not scrubbed The bootloader will load boot modules (e.g. kernel,...

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.

Record
GHSA-jpfw-vm34-2p3p
Updated
2026-11-02
OSVALPINE-CVE-2021-28693 5.5

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.

Record
ALPINE-CVE-2021-28693
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02
OSV 5.5

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.

Record
CVE-2021-28693
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02
Show 8 moreShow less
OSVDEBIAN-CVE-2021-28693 5.5

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.

Record
DEBIAN-CVE-2021-28693
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Updated
2026-11-02
OSVUBUNTU-CVE-2021-28693 5.5

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.

Record
UBUNTU-CVE-2021-28693
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
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

Affected products

Affected packages

Affected packages
PackageAffectedFixed
xen
Alpine:v3.11
 4.12.0 up to 4.13.3-r1
4.13.3-r1
xen
Alpine:v3.12
 4.12.0 up to 4.13.3-r1
4.13.3-r1
xen
Alpine:v3.13
 4.12.0 up to 4.14.1-r3
4.14.1-r3
xen
Alpine:v3.14
 4.12.0 up to 4.15.0-r1
4.15.0-r1
xen
Alpine:v3.15
 4.12.0 up to 4.15.0-r1
4.15.0-r1
xen
Alpine:v3.16
 4.12.0 up to 4.15.0-r1
4.15.0-r1
xen
Alpine:v3.17
 4.12.0 up to 4.15.0-r1
4.15.0-r1
xen
Alpine:v3.18
 4.12.0 up to 4.15.0-r1
4.15.0-r1
xen
Alpine:v3.19
 4.12.0 up to 4.15.0-r1
4.15.0-r1
xen
Alpine:v3.20
 4.12.0 up to 4.15.0-r1
4.15.0-r1
Show 34 moreShow less
Affected packages
PackageAffectedFixed
xen
Alpine:v3.21
 4.12.0 up to 4.15.0-r1
4.15.0-r1
xen
Alpine:v3.22
 4.12.0 up to 4.15.0-r1
4.15.0-r1
xen
Alpine:v3.23
 4.12.0 up to 4.15.0-r1
4.15.0-r1
xen
Alpine:v3.24
 4.12.0 up to 4.15.0-r1
4.15.0-r1
xen
Debian:12
 before 4.14.2+25-gb6a8c4f72d-1
4.14.2+25-gb6a8c4f72d-1
xen
Debian:13
 before 4.14.2+25-gb6a8c4f72d-1
4.14.2+25-gb6a8c4f72d-1
xen
Debian:14
 before 4.14.2+25-gb6a8c4f72d-1
4.14.2+25-gb6a8c4f72d-1
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
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-2021-28693 is a medium vulnerability (CVSS 5.5) in Xen, published June 30, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.32%, the 25th percentile. Fixed in xen 4.13.3-r1.

References

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