CVE-2023-34324: Possible deadlock in Linux kernel event handling

Published Oct 10, 2023
·
Updated

Closing of an event channel in the Linux kernel can result in a deadlock. This happens when the close is being performed in parallel to an unrelated Xen console action and the handling of a Xen console interrupt in an unprivileged guest.

The closing of an event channel is e.g. triggered by removal of a paravirtual device on the other side. As this action will cause console messages to be issued on the other side quite often, the chance of triggering the deadlock is not neglectable.

Note that 32-bit Arm-guests are not affected, as the 32-bit Linux kernel on Arm doesn't use queued-RW-locks, which are required to trigger the issue (on Arm32 a waiting writer doesn't block further readers to get the lock).

Affected Software

160 affected componentsFixes available
Linux Linux kernel<5.10
XEN Xen
ubuntu/linux-aws*
ubuntu/linux-azure*
ubuntu/linux-lts-xenial*
ubuntu/linux*
ubuntu/linux-aws*
ubuntu/linux-aws-hwe*
ubuntu/linux-azure*
ubuntu/linux-gcp*
ubuntu/linux-hwe*
ubuntu/linux-hwe-edge*
ubuntu/linux-kvm*
ubuntu/linux-oracle*
ubuntu/linux-fips*
ubuntu/linux*
ubuntu/linux-aws*
ubuntu/linux-aws-5.0*
ubuntu/linux-aws-5.3*
ubuntu/linux-aws-5.4<5.4.0-1118.128~18.04.1
5.4.0-1118.128~18.04.1
ubuntu/linux-azure*
ubuntu/linux-azure-4.15*
ubuntu/linux-azure-5.3*
ubuntu/linux-azure-5.4<5.4.0-1123.130~18.04.1
5.4.0-1123.130~18.04.1
ubuntu/linux-azure-edge*
ubuntu/linux-gcp*
ubuntu/linux-gcp-4.15*
ubuntu/linux-gcp-5.3*
ubuntu/linux-gcp-5.4<5.4.0-1122.131~18.04.1
5.4.0-1122.131~18.04.1
ubuntu/linux-gke-4.15*
ubuntu/linux-gke-5.4*
ubuntu/linux-gkeop-5.4*
ubuntu/linux-hwe*
ubuntu/linux-hwe-5.4<5.4.0-171.189~18.04.1
5.4.0-171.189~18.04.1
ubuntu/linux-ibm-5.4<5.4.0-1065.70~18.04.1
5.4.0-1065.70~18.04.1
ubuntu/linux-kvm*
ubuntu/linux-oem*
ubuntu/linux-oracle*
ubuntu/linux-oracle-5.0*
ubuntu/linux-oracle-5.3*
ubuntu/linux-oracle-5.4<5.4.0-1117.126~18.04.1
5.4.0-1117.126~18.04.1
ubuntu/linux-raspi-5.4<5.4.0-1102.114~18.04.1
5.4.0-1102.114~18.04.1
ubuntu/linux-aws-fips*
ubuntu/linux-azure-fips*
ubuntu/linux-fips*
ubuntu/linux-gcp-fips*
ubuntu/linux<5.4.0-171.189
5.4.0-171.189
ubuntu/linux-aws<5.4.0-1118.128
5.4.0-1118.128
ubuntu/linux-aws-5.15<5.15.0-1053.58~20.04.1
5.15.0-1053.58~20.04.1
ubuntu/linux-azure<5.4.0-1123.130
5.4.0-1123.130
ubuntu/linux-azure-5.15<5.15.0-1056.64~20.04.1
5.15.0-1056.64~20.04.1
ubuntu/linux-bluefield<5.4.0-1078.84
5.4.0-1078.84
ubuntu/linux-gcp<5.4.0-1122.131
5.4.0-1122.131
ubuntu/linux-gcp-5.15<5.15.0-1051.59~20.04.1
5.15.0-1051.59~20.04.1
ubuntu/linux-gkeop<5.4.0-1085.89
5.4.0-1085.89
ubuntu/linux-gkeop-5.15<5.15.0-1036.42~20.04.1
5.15.0-1036.42~20.04.1
ubuntu/linux-hwe-5.15<5.15.0-94.104~20.04.1
5.15.0-94.104~20.04.1
ubuntu/linux-ibm<5.4.0-1065.70
5.4.0-1065.70
ubuntu/linux-ibm-5.15<5.15.0-1046.49~20.04.1
5.15.0-1046.49~20.04.1
ubuntu/linux-intel-iotg-5.15<5.15.0-1048.54~20.04.1
5.15.0-1048.54~20.04.1
ubuntu/linux-iot<5.4.0-1030.31
5.4.0-1030.31
ubuntu/linux-kvm<5.4.0-1106.113
5.4.0-1106.113
ubuntu/linux-lowlatency-hwe-5.15<5.15.0-94.104~20.04.1
5.15.0-94.104~20.04.1
ubuntu/linux-nvidia-tegra-5.15<5.15.0-1022.22~20.04.1
5.15.0-1022.22~20.04.1
ubuntu/linux-oracle<5.4.0-1117.126
5.4.0-1117.126
ubuntu/linux-oracle-5.15<5.15.0-1051.57~20.04.1
5.15.0-1051.57~20.04.1
ubuntu/linux-raspi<5.4.0-1102.114
5.4.0-1102.114
ubuntu/linux-riscv-5.15<5.15.0-1049.53~20.04.2
5.15.0-1049.53~20.04.2
ubuntu/linux-xilinx-zynqmp<5.4.0-1037.41
5.4.0-1037.41
ubuntu/linux-aws-5.11*
ubuntu/linux-aws-5.13*
ubuntu/linux-aws-5.8*
ubuntu/linux-azure-5.11*
ubuntu/linux-azure-5.13*
ubuntu/linux-azure-5.8*
ubuntu/linux-azure-fde*
ubuntu/linux-gcp-5.11*
ubuntu/linux-gcp-5.13*
ubuntu/linux-gcp-5.8*
ubuntu/linux-gke*
ubuntu/linux-gke-5.15*
ubuntu/linux-hwe-5.11*
ubuntu/linux-hwe-5.13*
ubuntu/linux-hwe-5.8*
ubuntu/linux-intel-5.13*
ubuntu/linux-oem-5.10*
ubuntu/linux-oem-5.13*
ubuntu/linux-oem-5.6*
ubuntu/linux-oracle-5.11*
ubuntu/linux-oracle-5.13*
ubuntu/linux-oracle-5.8*
ubuntu/linux-raspi2*
ubuntu/linux-riscv*
ubuntu/linux-riscv-5.11*
ubuntu/linux-riscv-5.8*
ubuntu/linux-aws-fips<5.4.0-1118.128+fips1
5.4.0-1118.128+fips1
ubuntu/linux-azure-fips<5.4.0-1123.130+fips1
5.4.0-1123.130+fips1
ubuntu/linux-fips<5.4.0-1092.102
5.4.0-1092.102
ubuntu/linux-gcp-fips<5.4.0-1122.131+fips1
5.4.0-1122.131+fips1
ubuntu/linux-fips*
ubuntu/linux<5.15.0-94.104
5.15.0-94.104
ubuntu/linux-allwinner-5.19*
ubuntu/linux-aws<5.15.0-1053.58
5.15.0-1053.58
ubuntu/linux-aws-5.19*
ubuntu/linux-aws-6.2*
ubuntu/linux-aws-6.5*
ubuntu/linux-azure<5.15.0-1056.64
5.15.0-1056.64
ubuntu/linux-azure-5.19*
ubuntu/linux-azure-6.2*
ubuntu/linux-azure-6.5*
ubuntu/linux-azure-fde<5.15.0-1056.64.1
5.15.0-1056.64.1
ubuntu/linux-azure-fde-5.19*
ubuntu/linux-azure-fde-6.2*
ubuntu/linux-gcp<5.15.0-1051.59
5.15.0-1051.59
ubuntu/linux-gcp-5.19*
ubuntu/linux-gcp-6.2*
ubuntu/linux-gcp-6.5*
ubuntu/linux-gke<5.15.0-1050.55
5.15.0-1050.55
ubuntu/linux-gkeop<5.15.0-1036.42
5.15.0-1036.42
ubuntu/linux-hwe-5.19*
ubuntu/linux-hwe-6.2*
ubuntu/linux-hwe-6.5<6.5.0-17.17~22.04.1
6.5.0-17.17~22.04.1
ubuntu/linux-ibm<5.15.0-1046.49
5.15.0-1046.49
ubuntu/linux-intel-iotg<5.15.0-1047.53
5.15.0-1047.53
ubuntu/linux-kvm<5.15.0-1050.55
5.15.0-1050.55
ubuntu/linux-lowlatency<5.15.0-94.104
5.15.0-94.104
ubuntu/linux-lowlatency-hwe-5.19*
ubuntu/linux-lowlatency-hwe-6.2*
ubuntu/linux-lowlatency-hwe-6.5<6.5.0-17.17.1.1.1~22.04.1
6.5.0-17.17.1.1.1~22.04.1
ubuntu/linux-nvidia<5.15.0-1044.44
5.15.0-1044.44
ubuntu/linux-nvidia-6.2*
ubuntu/linux-nvidia-6.5<6.5.0-1014.14
6.5.0-1014.14
ubuntu/linux-nvidia-tegra<5.15.0-1022.22
5.15.0-1022.22
ubuntu/linux-nvidia-tegra-igx<5.15.0-1009.9
5.15.0-1009.9
ubuntu/linux-oem-5.17*
ubuntu/linux-oem-6.0*
ubuntu/linux-oem-6.1<6.1.0-1025.25
6.1.0-1025.25
ubuntu/linux-oem-6.5<6.5.0-1014.15
6.5.0-1014.15
ubuntu/linux-oracle<5.15.0-1051.57
5.15.0-1051.57
ubuntu/linux-oracle-6.5*
ubuntu/linux-raspi<5.15.0-1046.49
5.15.0-1046.49
ubuntu/linux-realtime*
ubuntu/linux-riscv*
ubuntu/linux-riscv-5.19*
ubuntu/linux-starfive-5.19*
ubuntu/linux-starfive-6.2*
ubuntu/linux-xilinx-zynqmp<5.15.0-1027.31
5.15.0-1027.31
ubuntu/linux-bluefield<5.15.0-1035.37
5.15.0-1035.37
ubuntu/linux-intel-iot-realtime<5.15.0-1046.48
5.15.0-1046.48
ubuntu/linux-realtime<5.15.0-1054.60
5.15.0-1054.60
ubuntu/linux-aws-fips*
ubuntu/linux-azure-fips*
ubuntu/linux-fips*
ubuntu/linux-gcp-fips*
ubuntu/linux-aws-fips<5.15.0-1053.58+fips1
5.15.0-1053.58+fips1
ubuntu/linux-fips<5.15.0-94.104+fips1
5.15.0-94.104+fips1
ubuntu/linux-gcp-fips<5.15.0-1055.63+fips2
5.15.0-1055.63+fips2
ubuntu/linux-raspi-realtime*
ubuntu/linux-vmware*
debian/linux
6.1.176-16.1.190-16.12.107-16.12.116-17.2.15-17.3.4-1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade ubuntu/linux-aws-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1118.128~18.04.1
  2. Upgrade

    Upgrade ubuntu/linux-azure-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1123.130~18.04.1
  3. Upgrade

    Upgrade ubuntu/linux-gcp-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1122.131~18.04.1
  4. Upgrade

    Upgrade ubuntu/linux-hwe-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-171.189~18.04.1
  5. Upgrade

    Upgrade ubuntu/linux-ibm-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1065.70~18.04.1
  6. Upgrade

    Upgrade ubuntu/linux-oracle-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1117.126~18.04.1
  7. Upgrade

    Upgrade ubuntu/linux-raspi-5.4 to a version that resolves this vulnerability.

    Fixed in 5.4.0-1102.114~18.04.1
  8. Upgrade

    Upgrade ubuntu/linux to a version that resolves this vulnerability.

    Fixed in 5.4.0-171.189
  9. Upgrade

    Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.

    Fixed in 5.4.0-1118.128
  10. Upgrade

    Upgrade ubuntu/linux-aws-5.15 to a version that resolves this vulnerability.

    Fixed in 5.15.0-1053.58~20.04.1
  11. Upgrade

    Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.

    Fixed in 5.4.0-1123.130
  12. Upgrade

    Upgrade ubuntu/linux-azure-5.15 to a version that resolves this vulnerability.

    Fixed in 5.15.0-1056.64~20.04.1
  13. Upgrade

    Upgrade ubuntu/linux-bluefield to a version that resolves this vulnerability.

    Fixed in 5.4.0-1078.84
  14. Upgrade

    Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.

    Fixed in 5.4.0-1122.131
  15. Upgrade

    Upgrade ubuntu/linux-gcp-5.15 to a version that resolves this vulnerability.

    Fixed in 5.15.0-1051.59~20.04.1
  16. Upgrade

    Upgrade ubuntu/linux-gkeop to a version that resolves this vulnerability.

    Fixed in 5.4.0-1085.89
  17. Upgrade

    Upgrade ubuntu/linux-gkeop-5.15 to a version that resolves this vulnerability.

    Fixed in 5.15.0-1036.42~20.04.1
  18. Upgrade

    Upgrade ubuntu/linux-hwe-5.15 to a version that resolves this vulnerability.

    Fixed in 5.15.0-94.104~20.04.1
  19. Upgrade

    Upgrade ubuntu/linux-ibm to a version that resolves this vulnerability.

    Fixed in 5.4.0-1065.70
  20. Upgrade

    Upgrade ubuntu/linux-ibm-5.15 to a version that resolves this vulnerability.

    Fixed in 5.15.0-1046.49~20.04.1
  21. Upgrade

    Upgrade ubuntu/linux-intel-iotg-5.15 to a version that resolves this vulnerability.

    Fixed in 5.15.0-1048.54~20.04.1
  22. Upgrade

    Upgrade ubuntu/linux-iot to a version that resolves this vulnerability.

    Fixed in 5.4.0-1030.31
  23. Upgrade

    Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.

    Fixed in 5.4.0-1106.113
  24. Upgrade

    Upgrade ubuntu/linux-lowlatency-hwe-5.15 to a version that resolves this vulnerability.

    Fixed in 5.15.0-94.104~20.04.1
  25. Upgrade

    Upgrade ubuntu/linux-nvidia-tegra-5.15 to a version that resolves this vulnerability.

    Fixed in 5.15.0-1022.22~20.04.1
  26. Upgrade

    Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.

    Fixed in 5.4.0-1117.126
  27. Upgrade

    Upgrade ubuntu/linux-oracle-5.15 to a version that resolves this vulnerability.

    Fixed in 5.15.0-1051.57~20.04.1
  28. Upgrade

    Upgrade ubuntu/linux-raspi to a version that resolves this vulnerability.

    Fixed in 5.4.0-1102.114
  29. Upgrade

    Upgrade ubuntu/linux-riscv-5.15 to a version that resolves this vulnerability.

    Fixed in 5.15.0-1049.53~20.04.2
  30. Upgrade

    Upgrade ubuntu/linux-xilinx-zynqmp to a version that resolves this vulnerability.

    Fixed in 5.4.0-1037.41
  31. Upgrade

    Upgrade ubuntu/linux-aws-fips to a version that resolves this vulnerability.

    Fixed in 5.4.0-1118.128+fips1
  32. Upgrade

    Upgrade ubuntu/linux-azure-fips to a version that resolves this vulnerability.

    Fixed in 5.4.0-1123.130+fips1
  33. Upgrade

    Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.

    Fixed in 5.4.0-1092.102
  34. Upgrade

    Upgrade ubuntu/linux-gcp-fips to a version that resolves this vulnerability.

    Fixed in 5.4.0-1122.131+fips1
  35. Upgrade

    Upgrade ubuntu/linux to a version that resolves this vulnerability.

    Fixed in 5.15.0-94.104
  36. Upgrade

    Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.

    Fixed in 5.15.0-1053.58
  37. Upgrade

    Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.

    Fixed in 5.15.0-1056.64
  38. Upgrade

    Upgrade ubuntu/linux-azure-fde to a version that resolves this vulnerability.

    Fixed in 5.15.0-1056.64.1
  39. Upgrade

    Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.

    Fixed in 5.15.0-1051.59
  40. Upgrade

    Upgrade ubuntu/linux-gke to a version that resolves this vulnerability.

    Fixed in 5.15.0-1050.55
  41. Upgrade

    Upgrade ubuntu/linux-gkeop to a version that resolves this vulnerability.

    Fixed in 5.15.0-1036.42
  42. Upgrade

    Upgrade ubuntu/linux-hwe-6.5 to a version that resolves this vulnerability.

    Fixed in 6.5.0-17.17~22.04.1
  43. Upgrade

    Upgrade ubuntu/linux-ibm to a version that resolves this vulnerability.

    Fixed in 5.15.0-1046.49
  44. Upgrade

    Upgrade ubuntu/linux-intel-iotg to a version that resolves this vulnerability.

    Fixed in 5.15.0-1047.53
  45. Upgrade

    Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.

    Fixed in 5.15.0-1050.55
  46. Upgrade

    Upgrade ubuntu/linux-lowlatency to a version that resolves this vulnerability.

    Fixed in 5.15.0-94.104
  47. Upgrade

    Upgrade ubuntu/linux-lowlatency-hwe-6.5 to a version that resolves this vulnerability.

    Fixed in 6.5.0-17.17.1.1.1~22.04.1
  48. Upgrade

    Upgrade ubuntu/linux-nvidia to a version that resolves this vulnerability.

    Fixed in 5.15.0-1044.44
  49. Upgrade

    Upgrade ubuntu/linux-nvidia-6.5 to a version that resolves this vulnerability.

    Fixed in 6.5.0-1014.14
  50. Upgrade

    Upgrade ubuntu/linux-nvidia-tegra to a version that resolves this vulnerability.

    Fixed in 5.15.0-1022.22
  51. Upgrade

    Upgrade ubuntu/linux-nvidia-tegra-igx to a version that resolves this vulnerability.

    Fixed in 5.15.0-1009.9
  52. Upgrade

    Upgrade ubuntu/linux-oem-6.1 to a version that resolves this vulnerability.

    Fixed in 6.1.0-1025.25
  53. Upgrade

    Upgrade ubuntu/linux-oem-6.5 to a version that resolves this vulnerability.

    Fixed in 6.5.0-1014.15
  54. Upgrade

    Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.

    Fixed in 5.15.0-1051.57
  55. Upgrade

    Upgrade ubuntu/linux-raspi to a version that resolves this vulnerability.

    Fixed in 5.15.0-1046.49
  56. Upgrade

    Upgrade ubuntu/linux-xilinx-zynqmp to a version that resolves this vulnerability.

    Fixed in 5.15.0-1027.31
  57. Upgrade

    Upgrade ubuntu/linux-bluefield to a version that resolves this vulnerability.

    Fixed in 5.15.0-1035.37
  58. Upgrade

    Upgrade ubuntu/linux-intel-iot-realtime to a version that resolves this vulnerability.

    Fixed in 5.15.0-1046.48
  59. Upgrade

    Upgrade ubuntu/linux-realtime to a version that resolves this vulnerability.

    Fixed in 5.15.0-1054.60
  60. Upgrade

    Upgrade ubuntu/linux-aws-fips to a version that resolves this vulnerability.

    Fixed in 5.15.0-1053.58+fips1
  61. Upgrade

    Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.

    Fixed in 5.15.0-94.104+fips1
  62. Upgrade

    Upgrade ubuntu/linux-gcp-fips to a version that resolves this vulnerability.

    Fixed in 5.15.0-1055.63+fips2
  63. Upgrade

    Upgrade debian/linux to a version that resolves this vulnerability.

    Fixed in 6.1.176-1Fixed in 6.1.190-1Fixed in 6.12.107-1Fixed in 6.12.116-1Fixed in 7.2.15-1Fixed in 7.3.4-1

Event History

Oct 11, 2023
CVE Published
via OSV·12:00 AM
Data Sourced
via OSV·12:00 AM
DescriptionSeverityAffected Software
Jan 5, 2024
CVE Published
via MITRE·04:30 PM
Data Sourced
via MITRE·04:30 PM
Description
Data Sourced
via NVD·05:15 PM
RemedyDescriptionSeverityWeaknessAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

1

What is the severity of CVE-2023-34324?

CVE-2023-34324 is classified as a medium severity vulnerability due to potential deadlock scenarios in the Linux kernel.

2

How do I fix CVE-2023-34324?

To mitigate CVE-2023-34324, upgrade to a fixed version of the Linux kernel listed, such as 5.10.223-1 or 6.12.12-1.

3

Which systems are affected by CVE-2023-34324?

CVE-2023-34324 affects the Linux kernel versions up to 5.10 and the Xen hypervisor.

4

Is CVE-2023-34324 exploitable remotely?

CVE-2023-34324 does not appear to be directly exploitable remotely as it involves deadlock situations in an unprivileged guest context.

5

What causes the deadlock in CVE-2023-34324?

The deadlock in CVE-2023-34324 occurs when closing an event channel in parallel with an unrelated Xen console action.

Company

Resources

Contact

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