CVE-2024-43869: perf: Fix event leak upon exec and file release

Published Aug 21, 2024
·
Updated

In the Linux kernel, the following vulnerability has been resolved:

perf: Fix event leak upon exec and file release

The perf pending task work is never waited upon the matching event release. In the case of a child event, released via freeevent() directly, this can potentially result in a leaked event, such as in the following scenario that doesn't even require a weak IRQ work implementation to trigger:

schedule() preparetaskswitch() =======> <NMI> perfeventoverflow() event->pendingsigtrap = ... irqworkqueue(&event->pendingirq) <======= </NMI> perfeventtaskschedout() eventschedout() event->pendingsigtrap = 0; atomiclongincnotzero(&event->refcount) taskworkadd(&event->pendingtask) finishlockswitch() =======> <IRQ> perfpendingirq() //do nothing, rely on pending task work <======= </IRQ>

beginnewexec() perfeventexittask() perfeventexitevent() // If is child event freeevent() WARN(atomiclongcmpxchg(&event->refcount, 1, 0) != 1) // event is leaked

Similar scenarios can also happen with perfeventremoveonexec() or simply against concurrent perfeventrelease().

Fix this with synchonizing against the possibly remaining pending task work while freeing the event, just like is done with remaining pending IRQ work. This means that the pending task callback neither need nor should hold a reference to the event, preventing it from ever beeing freed.

Affected Software

152 affected componentsFixes available
Linux Linux kernel>=5.15.84<5.15.165
Linux Linux kernel>=6.0.14<6.1
Linux Linux kernel>=6.1.1<6.1.103
Linux Linux kernel>=6.2<6.6.44
Linux Linux kernel>=6.7<6.10.3
Linux Linux kernel=6.1
Linux Linux kernel=6.1-rc8
debian/linux<6.1.106-1
6.1.106-1
debian/linux<6.10.3-1
6.10.3-1
debian/linux<6.10.3-1
6.10.3-1
debian/linux
6.1.176-16.1.190-16.12.107-16.12.115-27.2.12-17.2.15-1
ubuntu/linux-hwe-edge*
ubuntu/linux-aws-5.0*
ubuntu/linux-aws-5.3*
ubuntu/linux-azure*
ubuntu/linux-azure-5.3*
ubuntu/linux-azure-edge*
ubuntu/linux-gcp*
ubuntu/linux-gcp-5.3*
ubuntu/linux-gke-4.15*
ubuntu/linux-gke-5.4*
ubuntu/linux-gkeop-5.4*
ubuntu/linux-hwe*
ubuntu/linux-oem*
ubuntu/linux-oracle-5.0*
ubuntu/linux-oracle-5.3*
ubuntu/linux-aws-5.15<5.15.0-1072.78~20.04.1
5.15.0-1072.78~20.04.1
ubuntu/linux-azure-5.15<5.15.0-1078.87~20.04.1
5.15.0-1078.87~20.04.1
ubuntu/linux-gcp-5.15<5.15.0-1071.79~20.04.1
5.15.0-1071.79~20.04.1
ubuntu/linux-gkeop-5.15<5.15.0-1055.62~20.04.1
5.15.0-1055.62~20.04.1
ubuntu/linux-hwe-5.15<5.15.0-125.135~20.04.1
5.15.0-125.135~20.04.1
ubuntu/linux-ibm-5.15<5.15.0-1065.68~20.04.1
5.15.0-1065.68~20.04.1
ubuntu/linux-intel-iotg-5.15<5.15.0-1067.73~20.04.1
5.15.0-1067.73~20.04.1
ubuntu/linux-lowlatency-hwe-5.15<5.15.0-125.135~20.04.1
5.15.0-125.135~20.04.1
ubuntu/linux-nvidia-tegra-5.15<5.15.0-1032.32~20.04.1
5.15.0-1032.32~20.04.1
ubuntu/linux-oracle-5.15<5.15.0-1070.76~20.04.1
5.15.0-1070.76~20.04.1
ubuntu/linux-riscv-5.15<5.15.0-1068.72~20.04.1
5.15.0-1068.72~20.04.1
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<5.15.0-125.135
5.15.0-125.135
ubuntu/linux-allwinner-5.19*
ubuntu/linux-aws<5.15.0-1072.78
5.15.0-1072.78
ubuntu/linux-aws-5.19*
ubuntu/linux-aws-6.2*
ubuntu/linux-aws-6.5*
ubuntu/linux-aws-6.8<6.8.0-1020.22~22.04.1
6.8.0-1020.22~22.04.1
ubuntu/linux-azure<5.15.0-1075.84
5.15.0-1075.84
ubuntu/linux-azure-5.19*
ubuntu/linux-azure-6.2*
ubuntu/linux-azure-6.5*
ubuntu/linux-azure-6.8<6.8.0-1020.23~22.04.1
6.8.0-1020.23~22.04.1
ubuntu/linux-azure-fde<5.15.0-1076.85.1
5.15.0-1076.85.1
ubuntu/linux-azure-fde-5.19*
ubuntu/linux-azure-fde-6.2*
ubuntu/linux-gcp<5.15.0-1071.79
5.15.0-1071.79
ubuntu/linux-gcp-5.19*
ubuntu/linux-gcp-6.2*
ubuntu/linux-gcp-6.5*
ubuntu/linux-gcp-6.8<6.8.0-1019.21~22.04.1
6.8.0-1019.21~22.04.1
ubuntu/linux-gke<5.15.0-1069.75
5.15.0-1069.75
ubuntu/linux-gkeop<5.15.0-1055.62
5.15.0-1055.62
ubuntu/linux-hwe-5.19*
ubuntu/linux-hwe-6.2*
ubuntu/linux-hwe-6.5*
ubuntu/linux-hwe-6.8<6.8.0-50.51~22.04.1
6.8.0-50.51~22.04.1
ubuntu/linux-ibm<5.15.0-1065.68
5.15.0-1065.68
ubuntu/linux-ibm-6.8<6.8.0-1017.17~22.04.1
6.8.0-1017.17~22.04.1
ubuntu/linux-intel-iotg<5.15.0-1067.73
5.15.0-1067.73
ubuntu/linux-kvm<5.15.0-1069.74
5.15.0-1069.74
ubuntu/linux-lowlatency<5.15.0-125.135
5.15.0-125.135
ubuntu/linux-lowlatency-hwe-5.19*
ubuntu/linux-lowlatency-hwe-6.2*
ubuntu/linux-lowlatency-hwe-6.5*
ubuntu/linux-lowlatency-hwe-6.8<6.8.0-50.51.1~22.04.1
6.8.0-50.51.1~22.04.1
ubuntu/linux-nvidia<5.15.0-1067.68
5.15.0-1067.68
ubuntu/linux-nvidia-6.2*
ubuntu/linux-nvidia-6.5*
ubuntu/linux-nvidia-6.8<6.8.0-1019.21~22.04.1
6.8.0-1019.21~22.04.1
ubuntu/linux-nvidia-tegra<5.15.0-1032.32
5.15.0-1032.32
ubuntu/linux-nvidia-tegra-igx<5.15.0-1020.20
5.15.0-1020.20
ubuntu/linux-oem-5.17*
ubuntu/linux-oem-6.0*
ubuntu/linux-oem-6.1*
ubuntu/linux-oem-6.5*
ubuntu/linux-oracle<5.15.0-1070.76
5.15.0-1070.76
ubuntu/linux-oracle-6.5*
ubuntu/linux-oracle-6.8<6.8.0-1017.18~22.04.1
6.8.0-1017.18~22.04.1
ubuntu/linux-raspi<5.15.0-1065.68
5.15.0-1065.68
ubuntu/linux-realtime*
ubuntu/linux-riscv*
ubuntu/linux-riscv-5.19*
ubuntu/linux-riscv-6.5*
ubuntu/linux-riscv-6.8<6.8.0-50.51.1~22.04.1
6.8.0-50.51.1~22.04.1
ubuntu/linux-starfive-5.19*
ubuntu/linux-starfive-6.2*
ubuntu/linux-starfive-6.5*
ubuntu/linux-xilinx-zynqmp<5.15.0-1038.42
5.15.0-1038.42
ubuntu/linux-bluefield<5.15.0-1056.58
5.15.0-1056.58
ubuntu/linux-intel-iot-realtime<5.15.0-1066.68
5.15.0-1066.68
ubuntu/linux-realtime<5.15.0-1073.81
5.15.0-1073.81
ubuntu/linux-realtime-6.8<6.8.1-1013.14~22.04.1
6.8.1-1013.14~22.04.1
ubuntu/linux-aws-fips*
ubuntu/linux-azure-fips*
ubuntu/linux-fips*
ubuntu/linux-gcp-fips*
ubuntu/linux-aws-fips<5.15.0-1072.78+fips1
5.15.0-1072.78+fips1
ubuntu/linux-azure-fips<5.15.0-1075.84+fips1
5.15.0-1075.84+fips1
ubuntu/linux-fips<5.15.0-125.135+fips1
5.15.0-125.135+fips1
ubuntu/linux-gcp-fips<5.15.0-1071.79+fips1
5.15.0-1071.79+fips1
ubuntu/linux<6.8.0-50.51
6.8.0-50.51
ubuntu/linux-aws<6.8.0-1020.22
6.8.0-1020.22
ubuntu/linux-azure<6.8.0-1020.23
6.8.0-1020.23
ubuntu/linux-gcp<6.8.0-1019.21
6.8.0-1019.21
ubuntu/linux-gke<6.8.0-1015.19
6.8.0-1015.19
ubuntu/linux-gkeop<6.8.0-1002.4
6.8.0-1002.4
ubuntu/linux-ibm<6.8.0-1017.17
6.8.0-1017.17
ubuntu/linux-lowlatency<6.8.0-50.51.1
6.8.0-50.51.1
ubuntu/linux-nvidia<6.8.0-1019.21
6.8.0-1019.21
ubuntu/linux-nvidia-lowlatency<6.8.0-1019.21.1
6.8.0-1019.21.1
ubuntu/linux-oem-6.8<6.8.0-1018.18
6.8.0-1018.18
ubuntu/linux-oracle<6.8.0-1017.18
6.8.0-1017.18
ubuntu/linux-raspi<6.8.0-1016.18
6.8.0-1016.18
ubuntu/linux-riscv<6.8.0-50.51.1
6.8.0-50.51.1
ubuntu/linux-xilinx<6.8.0-1017.18
6.8.0-1017.18
ubuntu/linux-raspi-realtime<6.8.0-2015.16
6.8.0-2015.16
ubuntu/linux-realtime<6.8.1-1013.14
6.8.1-1013.14
ubuntu/linux-fips<6.8.0-78.78+fips1
6.8.0-78.78+fips1
ubuntu/linux-vmware*

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

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

    Fixed in 6.1.106-1
  2. Upgrade

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

    Fixed in 6.10.3-1
  3. 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 6.12.115-2Fixed in 7.2.12-1Fixed in 7.2.15-1
  4. Upgrade

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

    Fixed in 5.15.0-1072.78~20.04.1
  5. Upgrade

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

    Fixed in 5.15.0-1078.87~20.04.1
  6. Upgrade

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

    Fixed in 5.15.0-1071.79~20.04.1
  7. Upgrade

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

    Fixed in 5.15.0-1055.62~20.04.1
  8. Upgrade

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

    Fixed in 5.15.0-125.135~20.04.1
  9. Upgrade

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

    Fixed in 5.15.0-1065.68~20.04.1
  10. Upgrade

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

    Fixed in 5.15.0-1067.73~20.04.1
  11. Upgrade

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

    Fixed in 5.15.0-125.135~20.04.1
  12. Upgrade

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

    Fixed in 5.15.0-1032.32~20.04.1
  13. Upgrade

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

    Fixed in 5.15.0-1070.76~20.04.1
  14. Upgrade

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

    Fixed in 5.15.0-1068.72~20.04.1
  15. Upgrade

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

    Fixed in 5.15.0-125.135
  16. Upgrade

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

    Fixed in 5.15.0-1072.78
  17. Upgrade

    Upgrade ubuntu/linux-aws-6.8 to a version that resolves this vulnerability.

    Fixed in 6.8.0-1020.22~22.04.1
  18. Upgrade

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

    Fixed in 5.15.0-1075.84
  19. Upgrade

    Upgrade ubuntu/linux-azure-6.8 to a version that resolves this vulnerability.

    Fixed in 6.8.0-1020.23~22.04.1
  20. Upgrade

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

    Fixed in 5.15.0-1076.85.1
  21. Upgrade

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

    Fixed in 5.15.0-1071.79
  22. Upgrade

    Upgrade ubuntu/linux-gcp-6.8 to a version that resolves this vulnerability.

    Fixed in 6.8.0-1019.21~22.04.1
  23. Upgrade

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

    Fixed in 5.15.0-1069.75
  24. Upgrade

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

    Fixed in 5.15.0-1055.62
  25. Upgrade

    Upgrade ubuntu/linux-hwe-6.8 to a version that resolves this vulnerability.

    Fixed in 6.8.0-50.51~22.04.1
  26. Upgrade

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

    Fixed in 5.15.0-1065.68
  27. Upgrade

    Upgrade ubuntu/linux-ibm-6.8 to a version that resolves this vulnerability.

    Fixed in 6.8.0-1017.17~22.04.1
  28. Upgrade

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

    Fixed in 5.15.0-1067.73
  29. Upgrade

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

    Fixed in 5.15.0-1069.74
  30. Upgrade

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

    Fixed in 5.15.0-125.135
  31. Upgrade

    Upgrade ubuntu/linux-lowlatency-hwe-6.8 to a version that resolves this vulnerability.

    Fixed in 6.8.0-50.51.1~22.04.1
  32. Upgrade

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

    Fixed in 5.15.0-1067.68
  33. Upgrade

    Upgrade ubuntu/linux-nvidia-6.8 to a version that resolves this vulnerability.

    Fixed in 6.8.0-1019.21~22.04.1
  34. Upgrade

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

    Fixed in 5.15.0-1032.32
  35. Upgrade

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

    Fixed in 5.15.0-1020.20
  36. Upgrade

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

    Fixed in 5.15.0-1070.76
  37. Upgrade

    Upgrade ubuntu/linux-oracle-6.8 to a version that resolves this vulnerability.

    Fixed in 6.8.0-1017.18~22.04.1
  38. Upgrade

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

    Fixed in 5.15.0-1065.68
  39. Upgrade

    Upgrade ubuntu/linux-riscv-6.8 to a version that resolves this vulnerability.

    Fixed in 6.8.0-50.51.1~22.04.1
  40. Upgrade

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

    Fixed in 5.15.0-1038.42
  41. Upgrade

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

    Fixed in 5.15.0-1056.58
  42. Upgrade

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

    Fixed in 5.15.0-1066.68
  43. Upgrade

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

    Fixed in 5.15.0-1073.81
  44. Upgrade

    Upgrade ubuntu/linux-realtime-6.8 to a version that resolves this vulnerability.

    Fixed in 6.8.1-1013.14~22.04.1
  45. Upgrade

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

    Fixed in 5.15.0-1072.78+fips1
  46. Upgrade

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

    Fixed in 5.15.0-1075.84+fips1
  47. Upgrade

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

    Fixed in 5.15.0-125.135+fips1
  48. Upgrade

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

    Fixed in 5.15.0-1071.79+fips1
  49. Upgrade

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

    Fixed in 6.8.0-50.51
  50. Upgrade

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

    Fixed in 6.8.0-1020.22
  51. Upgrade

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

    Fixed in 6.8.0-1020.23
  52. Upgrade

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

    Fixed in 6.8.0-1019.21
  53. Upgrade

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

    Fixed in 6.8.0-1015.19
  54. Upgrade

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

    Fixed in 6.8.0-1002.4
  55. Upgrade

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

    Fixed in 6.8.0-1017.17
  56. Upgrade

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

    Fixed in 6.8.0-50.51.1
  57. Upgrade

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

    Fixed in 6.8.0-1019.21
  58. Upgrade

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

    Fixed in 6.8.0-1019.21.1
  59. Upgrade

    Upgrade ubuntu/linux-oem-6.8 to a version that resolves this vulnerability.

    Fixed in 6.8.0-1018.18
  60. Upgrade

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

    Fixed in 6.8.0-1017.18
  61. Upgrade

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

    Fixed in 6.8.0-1016.18
  62. Upgrade

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

    Fixed in 6.8.0-50.51.1
  63. Upgrade

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

    Fixed in 6.8.0-1017.18
  64. Upgrade

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

    Fixed in 6.8.0-2015.16
  65. Upgrade

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

    Fixed in 6.8.1-1013.14
  66. Upgrade

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

    Fixed in 6.8.0-78.78+fips1
  67. Compensating control

    Synchronize against any possibly remaining pending task work while freeing the perf event, as is done for remaining pending IRQ work.

Event History

Aug 21, 2024
CVE Published
via MITRE·12:06 AM
Data Sourced
via MITRE·12:06 AM
Description
Data Sourced
via OSV·01:15 AM
DescriptionSeverityAffected Software
Data Sourced
via NVD·01:15 AM
Description
Data Sourced
via Red Hat·01:20 AM
DescriptionSeverityAffected Software
Nov 3, 2025
Data Sourced
via NVD·10:18 PM
RemedySeverityWeaknessAffected Software

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

1

What is the severity of CVE-2024-43869?

CVE-2024-43869 is considered a medium severity vulnerability that can lead to potential information leaks.

2

How do I fix CVE-2024-43869?

To fix CVE-2024-43869, update the Linux kernel to one of the following versions: 5.10.223-1, 5.10.226-1, 6.1.119-1, 6.1.123-1, 6.12.10-1, or 6.12.11-1.

3

Which Linux kernel versions are affected by CVE-2024-43869?

CVE-2024-43869 affects multiple kernel versions, primarily those prior to the fixed versions mentioned in the remedy.

4

What can happen if I don't patch CVE-2024-43869?

Failure to patch CVE-2024-43869 can result in event leaks that may expose sensitive information during task execution.

5

Is CVE-2024-43869 specific to certain Linux distributions?

CVE-2024-43869 has been identified primarily in the Debian version of the Linux kernel.

Company

Resources

Contact

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