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CVE-2022-33747

Arm: unbounded memory consumption for 2nd-level page tables Certain actions require e.g. removing...

3.8 LowFix available

Arm: unbounded memory consumption for 2nd-level page tables Certain actions require e.g. removing pages from a guest's P2M (Physical-to-Machine) mapping. When large pages are in use to map guest pages in the 2nd-stage page tables, such a removal operation may incur a memory allocation (to replace a large mapping with individual smaller ones). These memory allocations are taken from the global memory pool. A malicious guest might be able to cause the global memory pool to be exhausted by manipulating its own P2M mappings.

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
None
Integrity
None
Availability
Low

Exploit likelihood

0.29%Down 0.6 points since Oct 12, 2022
90%50%10%1%

What each source reports

NVD Score used 3.8

Arm: unbounded memory consumption for 2nd-level page tables Certain actions require e.g. removing pages from a guest's P2M (Physical-to-Machine) mapping. When large pages are in use to map guest pages in the 2nd-stage page tables, such a removal operation may incur a memory allocation (to replace a large mapping with individual smaller ones). These memory allocations are taken from the global memory pool. A malicious guest might be able to cause the global memory pool to be exhausted by manipulating its own P2M mappings.

Record
CVE-2022-33747
CVSS 3.1
3.8 LowCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L
Weakness
CWE-404
Updated
2026-11-02
CVE List No score

Arm: unbounded memory consumption for 2nd-level page tables Certain actions require e.g. removing pages from a guest's P2M (Physical-to-Machine) mapping. When large pages are in use to map guest pages in the 2nd-stage page tables, such a removal operation may incur a memory allocation (to replace a large mapping with individual smaller ones). These memory allocations are taken from the global memory pool. A malicious guest might be able to cause the global memory pool to be exhausted by manipulating its own P2M mappings.

Record
CVE-2022-33747
Updated
2026-11-02
EUVDEUVD-2022-36786 No score

Arm: unbounded memory consumption for 2nd-level page tables Certain actions require e.g. removing pages from a guest's P2M (Physical-to-Machine) mapping. When large pages are in use to map guest pages in the 2nd-stage page tables, such a removal operation may incur a memory allocation (to replace a large mapping with individual smaller ones). These memory allocations are taken from the global memory pool. A malicious guest might be able to cause the global memory pool to be exhausted by manipulating its own P2M mappings.

Record
EUVD-2022-36786
Updated
2026-11-03
GitHub AdvisoriesGHSA-wp5g-757j-v342 3.8

Arm: unbounded memory consumption for 2nd-level page tables Certain actions require e.g. removing...

Arm: unbounded memory consumption for 2nd-level page tables Certain actions require e.g. removing pages from a guest's P2M (Physical-to-Machine) mapping. When large pages are in use to map guest pages in the 2nd-stage page tables, such a removal operation may incur a memory allocation (to replace a large mapping with individual smaller ones). These memory allocations are taken from the global memory pool. A malicious guest might be able to cause the global memory pool to be exhausted by manipulating its own P2M mappings.

Record
GHSA-wp5g-757j-v342
CVSS 3.1
3.8 LowCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L
Weakness
CWE-400, CWE-404
Updated
2026-11-02
OSVALPINE-CVE-2022-33747 3.8

Arm: unbounded memory consumption for 2nd-level page tables Certain actions require e.g. removing pages from a guest's P2M (Physical-to-Machine) mapping. When large pages are in use to map guest pages in the 2nd-stage page tables, such a removal operation may incur a memory allocation (to replace a large mapping with individual smaller ones). These memory allocations are taken from the global memory pool. A malicious guest might be able to cause the global memory pool to be exhausted by manipulating its own P2M mappings.

Record
ALPINE-CVE-2022-33747
CVSS 3.1
3.8 LowCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L
Updated
2026-11-03
OSV 3.8

Arm: unbounded memory consumption for 2nd-level page tables Certain actions require e.g. removing pages from a guest's P2M (Physical-to-Machine) mapping. When large pages are in use to map guest pages in the 2nd-stage page tables, such a removal operation may incur a memory allocation (to replace a large mapping with individual smaller ones). These memory allocations are taken from the global memory pool. A malicious guest might be able to cause the global memory pool to be exhausted by manipulating its own P2M mappings.

Record
CVE-2022-33747
CVSS 3.1
3.8 LowCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L
Updated
2026-11-02
Show 4 moreShow less
OSVUBUNTU-CVE-2022-33747 3.8

Arm: unbounded memory consumption for 2nd-level page tables Certain actions require e.g. removing pages from a guest's P2M (Physical-to-Machine) mapping. When large pages are in use to map guest pages in the 2nd-stage page tables, such a removal operation may incur a memory allocation (to replace a large mapping with individual smaller ones). These memory allocations are taken from the global memory pool. A malicious guest might be able to cause the global memory pool to be exhausted by manipulating its own P2M mappings.

Record
UBUNTU-CVE-2022-33747
CVSS 3.1
3.8 LowCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L
Updated
2026-11-02
OSVDEBIAN-CVE-2022-33747 No score

Arm: unbounded memory consumption for 2nd-level page tables Certain actions require e.g. removing pages from a guest's P2M (Physical-to-Machine) mapping. When large pages are in use to map guest pages in the 2nd-stage page tables, such a removal operation may incur a memory allocation (to replace a large mapping with individual smaller ones). These memory allocations are taken from the global memory pool. A malicious guest might be able to cause the global memory pool to be exhausted by manipulating its own P2M mappings.

Record
DEBIAN-CVE-2022-33747
Updated
2026-11-03
OSVSUSE-SU-2022:3947-1 No score

Security update for xen

This update for xen fixes the following issues:

  • CVE-2022-33746: Fixed DoS due to excessively long P2M pool freeing (bsc#1203806)
  • CVE-2022-33748: Fixed DoS due to race in locking (bsc#1203807)
  • CVE-2022-42311, CVE-2022-42312, CVE-2022-42313, CVE-2022-42314, CVE-2022-42315, CVE-2022-42316, CVE-2022-42317, CVE-2022-42318: xen: Xenstore: Guests can let xenstored run out of memory (bsc#1204482)
  • CVE-2022-42309: xen: Xenstore: Guests can crash xenstored (bsc#1204485)
  • CVE-2022-42310: xen: Xenstore: Guests can create orphaned Xenstore nodes (bsc#1204487)
  • CVE-2022-42319: xen: Xenstore: Guests can cause Xenstore to not free temporary memory (bsc#1204488)
  • CVE-2022-42320: xen: Xenstore: Guests can get access to Xenstore nodes of deleted domains (bsc#1204489)
  • CVE-2022-42321: xen: Xenstore: Guests can crash xenstored via exhausting the stack (bsc#1204490)
  • CVE-2022-42322,CVE-2022-42323: xen: Xenstore: cooperating guests can create arbitrary numbers of nodes (bsc#1204494)
  • CVE-2022-42325,CVE-2022-42326: xen: Xenstore: Guests can create arbitrary number of nodes via transactions (bsc#1204496)
  • xen: Frontends vulnerable to backends (bsc#1193923)
Record
SUSE-SU-2022:3947-1
Updated
2026-11-02
OSVSUSE-SU-2022:4007-1 No score

Security update for xen

This update for xen fixes the following issues:

  • CVE-2022-33746: Fixed DoS due to excessively long P2M pool freeing (bsc#1203806).
  • CVE-2022-33748: Fixed DoS due to race in locking (bsc#1203807).
  • CVE-2022-42311, CVE-2022-42312, CVE-2022-42313, CVE-2022-42314, CVE-2022-42315, CVE-2022-42316, CVE-2022-42317, CVE-2022-42318: xen: Xenstore: Guests can let xenstored run out of memory (bsc#1204482)
  • CVE-2022-42309: xen: Xenstore: Guests can crash xenstored (bsc#1204485)
  • CVE-2022-42310: xen: Xenstore: Guests can create orphaned Xenstore nodes (bsc#1204487)
  • CVE-2022-42319: xen: Xenstore: Guests can cause Xenstore to not free temporary memory (bsc#1204488)
  • CVE-2022-42320: xen: Xenstore: Guests can get access to Xenstore nodes of deleted domains (bsc#1204489)
  • CVE-2022-42321: xen: Xenstore: Guests can crash xenstored via exhausting the stack (bsc#1204490)
  • CVE-2022-42322,CVE-2022-42323: xen: Xenstore: cooperating guests can create arbitrary numbers of nodes (bsc#1204494)
  • CVE-2022-42325,CVE-2022-42326: xen: Xenstore: Guests can create arbitrary number of nodes via transactions (bsc#1204496)
  • xen: Frontends vulnerable to backends (bsc#1193923).
Record
SUSE-SU-2022:4007-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
xen
Alpine:v3.14
 before 4.15.4-r0
4.15.4-r0
xen
Alpine:v3.15
 before 4.15.4-r0
4.15.4-r0
xen
Alpine:v3.16
 before 4.16.3-r0
4.16.3-r0
xen
Alpine:v3.17
 before 4.16.3-r0
4.16.3-r0
xen
Alpine:v3.18
 before 4.17.0-r0
4.17.0-r0
xen
Alpine:v3.19
 before 4.17.0-r0
4.17.0-r0
xen
Alpine:v3.20
 before 4.17.0-r0
4.17.0-r0
xen
Alpine:v3.21
 before 4.17.0-r0
4.17.0-r0
xen
Alpine:v3.22
 before 4.17.0-r0
4.17.0-r0
xen
Alpine:v3.23
 before 4.17.0-r0
4.17.0-r0
Show 23 moreShow less
Affected packages
PackageAffectedFixed
xen
Alpine:v3.24
 before 4.17.0-r0
4.17.0-r0
xen
Debian:12
 before 4.16.2+90-g0d39a6d1ae-1
4.16.2+90-g0d39a6d1ae-1
xen
Debian:13
 before 4.16.2+90-g0d39a6d1ae-1
4.16.2+90-g0d39a6d1ae-1
xen
Debian:14
 before 4.16.2+90-g0d39a6d1ae-1
4.16.2+90-g0d39a6d1ae-1
xen
Debian:11
From an advisory covering 22 CVEs
 before 4.14.5+86-g1c354767d5-1, plus listed versions
4.14.2+25-gb6a8c4f72d-24.14.3+32-g9de3671772-14.14.3+32-g9de3671772-1~deb11u14.14.3-14.14.3-1~deb11u14.14.4+74-gd7b22226b5-14.14.5+24-g87d90d511c-1
4.14.5+86-g1c354767d5-1
xen
SUSE:Linux Enterprise Module for Basesystem 15 SP3
From an advisory covering 20 CVEs
 before 4.14.5_08-150300.3.40.1
4.14.5_08-150300.3.40.1
xen
SUSE:Linux Enterprise Module for Server Applications 15 SP3
From an advisory covering 20 CVEs
 before 4.14.5_08-150300.3.40.1
4.14.5_08-150300.3.40.1
xen
SUSE:Linux Enterprise Micro 5.1
From an advisory covering 20 CVEs
 before 4.14.5_08-150300.3.40.1
4.14.5_08-150300.3.40.1
xen
SUSE:Linux Enterprise Micro 5.2
From an advisory covering 20 CVEs
 before 4.14.5_08-150300.3.40.1
4.14.5_08-150300.3.40.1
xen
openSUSE:Leap Micro 5.2
From an advisory covering 20 CVEs
 before 4.14.5_08-150300.3.40.1
4.14.5_08-150300.3.40.1
xen
openSUSE:Leap 15.3
From an advisory covering 20 CVEs
 before 4.14.5_08-150300.3.40.1
4.14.5_08-150300.3.40.1
xen
SUSE:Linux Enterprise Micro 5.3
From an advisory covering 21 CVEs
 before 4.16.2_08-150400.4.16.1
4.16.2_08-150400.4.16.1
xen
SUSE:Linux Enterprise Module for Basesystem 15 SP4
From an advisory covering 21 CVEs
 before 4.16.2_08-150400.4.16.1
4.16.2_08-150400.4.16.1
xen
SUSE:Linux Enterprise Module for Server Applications 15 SP4
From an advisory covering 21 CVEs
 before 4.16.2_08-150400.4.16.1
4.16.2_08-150400.4.16.1
xen
openSUSE:Leap 15.4
From an advisory covering 21 CVEs
 before 4.16.2_08-150400.4.16.1
4.16.2_08-150400.4.16.1
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

History

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

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

In short

CVE-2022-33747 is a low vulnerability (CVSS 3.8) in Debian Linux, published October 11, 2022. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.29%, the 21st percentile. Fixed in xen 4.15.4-r0.

References

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