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CVE-2023-34323

xenstored: A transaction conflict can crash C Xenstored

5.5 MediumFix available

When a transaction is committed, C Xenstored will first check the quota is correct before attempting to commit any nodes. It would be possible that accounting is temporarily negative if a node has been removed outside of the transaction.

Unfortunately, some versions of C Xenstored are assuming that the quota cannot be negative and are using assert() to confirm it. This will lead to C Xenstored crash when tools are built without -DNDEBUG (this is the default).

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
High

Exploit likelihood

0.24%Up 0.2 points since Jan 10, 2024
90%50%10%1%

What each source reports

NVD Score used 5.5

When a transaction is committed, C Xenstored will first check the quota is correct before attempting to commit any nodes. It would be possible that accounting is temporarily negative if a node has been removed outside of the transaction.

Unfortunately, some versions of C Xenstored are assuming that the quota cannot be negative and are using assert() to confirm it. This will lead to C Xenstored crash when tools are built without -DNDEBUG (this is the default).

Record
CVE-2023-34323
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-476
Updated
2026-11-02
CVE List 5.5

xenstored: A transaction conflict can crash C Xenstored

When a transaction is committed, C Xenstored will first check the quota is correct before attempting to commit any nodes. It would be possible that accounting is temporarily negative if a node has been removed outside of the transaction.

Unfortunately, some versions of C Xenstored are assuming that the quota cannot be negative and are using assert() to confirm it. This will lead to C Xenstored crash when tools are built without -DNDEBUG (this is the default).

Record
CVE-2023-34323
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-476
Updated
2026-11-02
EUVDEUVD-2023-38404 5.5

When a transaction is committed, C Xenstored will first check the quota is correct before attempting to commit any nodes. It would be possible that accounting is temporarily negative if a node has been removed outside of the transaction.

Unfortunately, some versions of C Xenstored are assuming that the quota cannot be negative and are using assert() to confirm it. This will lead to C Xenstored crash when tools are built without -DNDEBUG (this is the default).

Record
EUVD-2023-38404
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
GitHub AdvisoriesGHSA-85fq-cwc3-mp4q 5.5

When a transaction is committed, C Xenstored will first check the quota is correct before...

When a transaction is committed, C Xenstored will first check the quota is correct before attempting to commit any nodes. It would be possible that accounting is temporarily negative if a node has been removed outside of the transaction.

Unfortunately, some versions of C Xenstored are assuming that the quota cannot be negative and are using assert() to confirm it. This will lead to C Xenstored crash when tools are built without -DNDEBUG (this is the default).

Record
GHSA-85fq-cwc3-mp4q
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-476
Updated
2026-11-02
OSVALPINE-CVE-2023-34323 5.5

When a transaction is committed, C Xenstored will first check the quota is correct before attempting to commit any nodes. It would be possible that accounting is temporarily negative if a node has been removed outside of the transaction.

Unfortunately, some versions of C Xenstored are assuming that the quota cannot be negative and are using assert() to confirm it. This will lead to C Xenstored crash when tools are built without -DNDEBUG (this is the default).

Record
ALPINE-CVE-2023-34323
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSV 5.5

When a transaction is committed, C Xenstored will first check the quota is correct before attempting to commit any nodes. It would be possible that accounting is temporarily negative if a node has been removed outside of the transaction.

Unfortunately, some versions of C Xenstored are assuming that the quota cannot be negative and are using assert() to confirm it. This will lead to C Xenstored crash when tools are built without -DNDEBUG (this is the default).

Record
CVE-2023-34323
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
Show 9 moreShow less
OSVDEBIAN-CVE-2023-34323 5.5

When a transaction is committed, C Xenstored will first check the quota is correct before attempting to commit any nodes. It would be possible that accounting is temporarily negative if a node has been removed outside of the transaction. Unfortunately, some versions of C Xenstored are assuming that the quota cannot be negative and are using assert() to confirm it. This will lead to C Xenstored crash when tools are built without -DNDEBUG (this is the default).

Record
DEBIAN-CVE-2023-34323
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVUBUNTU-CVE-2023-34323 5.5

When a transaction is committed, C Xenstored will first check the quota is correct before attempting to commit any nodes. It would be possible that accounting is temporarily negative if a node has been removed outside of the transaction. Unfortunately, some versions of C Xenstored are assuming that the quota cannot be negative and are using assert() to confirm it. This will lead to C Xenstored crash when tools are built without -DNDEBUG (this is the default).

Record
UBUNTU-CVE-2023-34323
CVSS 3.1
5.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVopenSUSE-SU-2024:13442-1 No score

xen-4.18.0_02-1.1 on GA media

These are all security issues fixed in the xen-4.18.0_02-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:13442-1
Updated
2026-11-02
OSVSUSE-SU-2023:4054-1 No score

Security update for xen

This update for xen fixes the following issues:

  • CVE-2023-34323: A transaction conflict can crash C Xenstored (XSA-440, bsc#1215744)
  • CVE-2023-34326: Missing IOMMU TLB flushing (XSA-442, bsc#1215746)
  • CVE-2023-34325: Multiple vulnerabilities in libfsimage disk handling (XSA-443, bsc#1215747)
  • CVE-2023-34327: Debug Mask handling (XSA-444, bsc#1215748)
  • CVE-2023-34328: Debug Mask handling (XSA-444, bsc#1215748)
Record
SUSE-SU-2023:4054-1
Updated
2026-11-02
OSVSUSE-SU-2023:4055-1 No score

Security update for xen

This update for xen fixes the following issues:

  • CVE-2023-34323: A transaction conflict can crash C Xenstored (XSA-440, bsc#1215744)
  • CVE-2023-34326: Missing IOMMU TLB flushing (XSA-442, bsc#1215746)
  • CVE-2023-34325: Multiple vulnerabilities in libfsimage disk handling (XSA-443, bsc#1215747)
  • CVE-2023-34327: Debug Mask handling (XSA-444, bsc#1215748)
  • CVE-2023-34328: Debug Mask handling (XSA-444, bsc#1215748)
Record
SUSE-SU-2023:4055-1
Updated
2026-11-02
OSVSUSE-SU-2023:4174-1 No score

Security update for xen

This update for xen fixes the following issues:

  • CVE-2023-34323: Fixed a potential crash in C Xenstored due to an incorrect assertion (XSA-440) (bsc#1215744).
  • CVE-2023-34326: Fixed a missing IOMMU TLB flush on x86 AMD systems with IOMMU hardware and PCI passthrough enabled (XSA-442) (bsc#1215746).
  • CVE-2023-34325: Fixed multiple parsing issues in libfsimage (XSA-443) (bsc#1215747).
  • CVE-2023-34327, CVE-2023-34328: Fixed multiple issues with AMD x86 debugging functionality for guests (XSA-444) (bsc#1215748).
Record
SUSE-SU-2023:4174-1
Updated
2026-11-02
OSVSUSE-SU-2023:4183-1 No score

Security update for xen

This update for xen fixes the following issues:

  • CVE-2023-34323: Fixed a potential crash in C Xenstored due to an incorrect assertion (XSA-440) (bsc#1215744).
  • CVE-2023-34326: Fixed a missing IOMMU TLB flush on x86 AMD systems with IOMMU hardware and PCI passthrough enabled (XSA-442) (bsc#1215746).
  • CVE-2023-34325: Fixed multiple parsing issues in libfsimage (XSA-443) (bsc#1215747).
  • CVE-2023-34327, CVE-2023-34328: Fixed multiple issues with AMD x86 debugging functionality for guests (XSA-444) (bsc#1215748).
Record
SUSE-SU-2023:4183-1
Updated
2026-11-02
OSVSUSE-SU-2023:4184-1 No score

Security update for xen

This update for xen fixes the following issues:

  • CVE-2023-34323: Fixed a potential crash in C Xenstored due to an incorrect assertion (XSA-440) (bsc#1215744).
  • CVE-2023-34326: Fixed a missing IOMMU TLB flush on x86 AMD systems with IOMMU hardware and PCI passthrough enabled (XSA-442) (bsc#1215746).
  • CVE-2023-34325: Fixed multiple parsing issues in libfsimage (XSA-443) (bsc#1215747).
  • CVE-2023-34327, CVE-2023-34328: Fixed multiple issues with AMD x86 debugging functionality for guests (XSA-444) (bsc#1215748).
Record
SUSE-SU-2023:4184-1
Updated
2026-11-02
OSVSUSE-SU-2023:4185-1 No score

Security update for xen

This update for xen fixes the following issues:

  • CVE-2023-34323: Fixed a potential crash in C Xenstored due to an incorrect assertion (XSA-440) (bsc#1215744).
  • CVE-2023-34326: Fixed a missing IOMMU TLB flush on x86 AMD systems with IOMMU hardware and PCI passthrough enabled (XSA-442) (bsc#1215746).
  • CVE-2023-34325: Fixed multiple parsing issues in libfsimage (XSA-443) (bsc#1215747).
  • CVE-2023-34327, CVE-2023-34328: Fixed multiple issues with AMD x86 debugging functionality for guests (XSA-444) (bsc#1215748).
Record
SUSE-SU-2023:4185-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
xen
Alpine:v3.15
 before 4.15.5-r3
4.15.5-r3
xen
Alpine:v3.16
 before 4.16.5-r3
4.16.5-r3
xen
Alpine:v3.17
 before 4.16.5-r3
4.16.5-r3
xen
Alpine:v3.18
 before 4.17.2-r3
4.17.2-r3
xen
Alpine:v3.19
 before 4.17.2-r3
4.17.2-r3
xen
Alpine:v3.20
 before 4.17.2-r3
4.17.2-r3
xen
Alpine:v3.21
 before 4.17.2-r3
4.17.2-r3
xen
Alpine:v3.22
 before 4.17.2-r3
4.17.2-r3
xen
Alpine:v3.23
 before 4.17.2-r3
4.17.2-r3
xen
Alpine:v3.24
 before 4.17.2-r3
4.17.2-r3
Show 39 moreShow less
Affected packages
PackageAffectedFixed
xen
Debian:12
 before 4.17.2+76-ge1f9cb16e2-1~deb12u1, plus listed versions
4.17.1+2-gb773c48e36-14.17.2+55-g0b56bed864-14.17.2-1
4.17.2+76-ge1f9cb16e2-1~deb12u1
xen
Debian:13
 before 4.17.2+55-g0b56bed864-1
4.17.2+55-g0b56bed864-1
xen
Debian:14
 before 4.17.2+55-g0b56bed864-1
4.17.2+55-g0b56bed864-1
xen
SUSE:Linux Enterprise Micro 5.5
From an advisory covering 5 CVEs
 before 4.17.2_06-150500.3.12.1
4.17.2_06-150500.3.12.1
xen
SUSE:Linux Enterprise Module for Basesystem 15 SP5
From an advisory covering 5 CVEs
 before 4.17.2_06-150500.3.12.1
4.17.2_06-150500.3.12.1
xen
SUSE:Linux Enterprise Module for Server Applications 15 SP5
From an advisory covering 5 CVEs
 before 4.17.2_06-150500.3.12.1
4.17.2_06-150500.3.12.1
xen
openSUSE:Leap 15.5
From an advisory covering 5 CVEs
 before 4.17.2_06-150500.3.12.1
4.17.2_06-150500.3.12.1
xen
SUSE:Linux Enterprise Micro 5.3
From an advisory covering 5 CVEs
 before 4.16.5_06-150400.4.37.1
4.16.5_06-150400.4.37.1
xen
SUSE:Linux Enterprise Micro 5.4
From an advisory covering 5 CVEs
 before 4.16.5_06-150400.4.37.1
4.16.5_06-150400.4.37.1
xen
SUSE:Linux Enterprise Module for Basesystem 15 SP4
From an advisory covering 5 CVEs
 before 4.16.5_06-150400.4.37.1
4.16.5_06-150400.4.37.1
xen
SUSE:Linux Enterprise Module for Server Applications 15 SP4
From an advisory covering 5 CVEs
 before 4.16.5_06-150400.4.37.1
4.16.5_06-150400.4.37.1
xen
openSUSE:Leap 15.4
From an advisory covering 5 CVEs
 before 4.16.5_06-150400.4.37.1
4.16.5_06-150400.4.37.1
xen
SUSE:Linux Enterprise High Performance Computing 15 SP3-ESPOS
From an advisory covering 5 CVEs
 before 4.14.6_06-150300.3.57.1
4.14.6_06-150300.3.57.1
xen
SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSS
From an advisory covering 5 CVEs
 before 4.14.6_06-150300.3.57.1
4.14.6_06-150300.3.57.1
xen
SUSE:Linux Enterprise Server 15 SP3-LTSS
From an advisory covering 5 CVEs
 before 4.14.6_06-150300.3.57.1
4.14.6_06-150300.3.57.1
xen
SUSE:Linux Enterprise Server for SAP Applications 15 SP3
From an advisory covering 5 CVEs
 before 4.14.6_06-150300.3.57.1
4.14.6_06-150300.3.57.1
xen
SUSE:Manager Proxy 4.2
From an advisory covering 5 CVEs
 before 4.14.6_06-150300.3.57.1
4.14.6_06-150300.3.57.1
xen
SUSE:Manager Server 4.2
From an advisory covering 5 CVEs
 before 4.14.6_06-150300.3.57.1
4.14.6_06-150300.3.57.1
xen
SUSE:Linux Enterprise Micro 5.1
From an advisory covering 5 CVEs
 before 4.14.6_06-150300.3.57.1
4.14.6_06-150300.3.57.1
xen
SUSE:Linux Enterprise Micro 5.2
From an advisory covering 5 CVEs
 before 4.14.6_06-150300.3.57.1
4.14.6_06-150300.3.57.1
xen
SUSE:Enterprise Storage 7.1
From an advisory covering 5 CVEs
 before 4.14.6_06-150300.3.57.1
4.14.6_06-150300.3.57.1
xen
SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSS
From an advisory covering 5 CVEs
 before 4.13.5_06-150200.3.80.1
4.13.5_06-150200.3.80.1
xen
SUSE:Linux Enterprise Server 15 SP2-LTSS
From an advisory covering 5 CVEs
 before 4.13.5_06-150200.3.80.1
4.13.5_06-150200.3.80.1
xen
SUSE:Linux Enterprise Server for SAP Applications 15 SP2
From an advisory covering 5 CVEs
 before 4.13.5_06-150200.3.80.1
4.13.5_06-150200.3.80.1
xen
SUSE:Linux Enterprise High Performance Computing 15 SP1-LTSS
From an advisory covering 5 CVEs
 before 4.12.4_40-150100.3.95.1
4.12.4_40-150100.3.95.1
xen
SUSE:Linux Enterprise Server 15 SP1-LTSS
From an advisory covering 5 CVEs
 before 4.12.4_40-150100.3.95.1
4.12.4_40-150100.3.95.1
xen
SUSE:Linux Enterprise Server for SAP Applications 15 SP1
From an advisory covering 5 CVEs
 before 4.12.4_40-150100.3.95.1
4.12.4_40-150100.3.95.1
xen
SUSE:Linux Enterprise Software Development Kit 12 SP5
From an advisory covering 5 CVEs
 before 4.12.4_40-3.97.1
4.12.4_40-3.97.1
xen
SUSE:Linux Enterprise Server 12 SP5
From an advisory covering 5 CVEs
 before 4.12.4_40-3.97.1
4.12.4_40-3.97.1
xen
SUSE:Linux Enterprise Server for SAP Applications 12 SP5
From an advisory covering 5 CVEs
 before 4.12.4_40-3.97.1
4.12.4_40-3.97.1
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:Tumbleweed
From an advisory covering 6 CVEs
 before 4.18.0_02-1.1
4.18.0_02-1.1

History

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

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

In short

CVE-2023-34323 is a medium vulnerability (CVSS 5.5) in Xen, published October 12, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.24%, the 15th percentile. Fixed in xen 4.15.5-r3.

References

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