CVE-2023-54306: net: tls: avoid hanging tasks on the tx_lock

Published Dec 30, 2025
·
Updated

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

net: tls: avoid hanging tasks on the txlock

syzbot sent a hung task report and Eric explains that adversarial receiver may keep RWIN at 0 for a long time, so we are not guaranteed to make forward progress. Thread which took txlock and went to sleep may not release txlock for hours. Use interruptible sleep where possible and reschedule the work if it can't take the lock.

Testing: existing selftest passes

Affected Software

147 affected componentsFixes available
linux/kernel
ubuntu/linux-hwe-edge*
ubuntu/linux-aws-5.0*
ubuntu/linux-aws-5.3*
ubuntu/linux-aws-5.4<5.4.0-1104.112~18.04.1
5.4.0-1104.112~18.04.1
ubuntu/linux-azure*
ubuntu/linux-azure-5.3*
ubuntu/linux-azure-5.4<5.4.0-1110.116~18.04.1
5.4.0-1110.116~18.04.1
ubuntu/linux-azure-edge*
ubuntu/linux-gcp*
ubuntu/linux-gcp-5.3*
ubuntu/linux-gcp-5.4<5.4.0-1107.116~18.04.1
5.4.0-1107.116~18.04.1
ubuntu/linux-gke-4.15*
ubuntu/linux-gke-5.4*
ubuntu/linux-gkeop-5.4*
ubuntu/linux-hwe*
ubuntu/linux-hwe-5.4<5.4.0-152.169~18.04.1
5.4.0-152.169~18.04.1
ubuntu/linux-hwe-edge*
ubuntu/linux-ibm-5.4<5.4.0-1051.56~18.04.1
5.4.0-1051.56~18.04.1
ubuntu/linux-oem*
ubuntu/linux-oracle-5.0*
ubuntu/linux-oracle-5.3*
ubuntu/linux-oracle-5.4<5.4.0-1103.112~18.04.1
5.4.0-1103.112~18.04.1
ubuntu/linux-raspi-5.4<5.4.0-1088.99~18.04.1
5.4.0-1088.99~18.04.1
ubuntu/linux<5.4.0-152.169
5.4.0-152.169
ubuntu/linux-aws<5.4.0-1104.112
5.4.0-1104.112
ubuntu/linux-aws-5.15<5.15.0-1041.46~20.04.1
5.15.0-1041.46~20.04.1
ubuntu/linux-azure<5.4.0-1110.116
5.4.0-1110.116
ubuntu/linux-azure-5.15<5.15.0-1045.52~20.04.1
5.15.0-1045.52~20.04.1
ubuntu/linux-bluefield<5.4.0-1065.71
5.4.0-1065.71
ubuntu/linux-gcp<5.4.0-1107.116
5.4.0-1107.116
ubuntu/linux-gcp-5.15<5.15.0-1039.47~20.04.1
5.15.0-1039.47~20.04.1
ubuntu/linux-hwe-5.15<5.15.0-79.86~20.04.2
5.15.0-79.86~20.04.2
ubuntu/linux-ibm<5.4.0-1051.56
5.4.0-1051.56
ubuntu/linux-ibm-5.15<5.15.0-1036.39~20.04.1
5.15.0-1036.39~20.04.1
ubuntu/linux-intel-iotg-5.15<5.15.0-1037.42~20.04.1
5.15.0-1037.42~20.04.1
ubuntu/linux-iot<5.4.0-1017.18
5.4.0-1017.18
ubuntu/linux-kvm<5.4.0-1093.99
5.4.0-1093.99
ubuntu/linux-lowlatency-hwe-5.15<5.15.0-79.88~20.04.1
5.15.0-79.88~20.04.1
ubuntu/linux-nvidia-tegra-5.15<5.15.0-1016.16~20.04.1
5.15.0-1016.16~20.04.1
ubuntu/linux-oracle<5.4.0-1103.112
5.4.0-1103.112
ubuntu/linux-oracle-5.15<5.15.0-1040.46~20.04.1
5.15.0-1040.46~20.04.1
ubuntu/linux-raspi<5.4.0-1088.99
5.4.0-1088.99
ubuntu/linux-riscv-5.15<5.15.0-1038.42~20.04.2
5.15.0-1038.42~20.04.2
ubuntu/linux-xilinx-zynqmp<5.4.0-1024.28
5.4.0-1024.28
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-gkeop*
ubuntu/linux-gkeop-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<5.4.0-1104.112+fips1
5.4.0-1104.112+fips1
ubuntu/linux-azure-fips<5.4.0-1110.116+fips1
5.4.0-1110.116+fips1
ubuntu/linux-fips<5.4.0-1079.88
5.4.0-1079.88
ubuntu/linux-gcp-fips<5.4.0-1107.116+fips1
5.4.0-1107.116+fips1
ubuntu/linux-aws-fips*
ubuntu/linux-azure-fips*
ubuntu/linux-fips*
ubuntu/linux-gcp-fips*
ubuntu/linux<5.15.0-79.86
5.15.0-79.86
ubuntu/linux-allwinner-5.19*
ubuntu/linux-aws<5.15.0-1042.47
5.15.0-1042.47
ubuntu/linux-aws-5.19*
ubuntu/linux-aws-6.2*
ubuntu/linux-aws-6.5*
ubuntu/linux-azure<5.15.0-1045.52
5.15.0-1045.52
ubuntu/linux-azure-5.19*
ubuntu/linux-azure-6.2*
ubuntu/linux-azure-6.5*
ubuntu/linux-azure-fde<5.15.0-1045.52.1
5.15.0-1045.52.1
ubuntu/linux-azure-fde-5.19*
ubuntu/linux-azure-fde-6.2*
ubuntu/linux-gcp<5.15.0-1039.47
5.15.0-1039.47
ubuntu/linux-gcp-5.19*
ubuntu/linux-gcp-6.2*
ubuntu/linux-gcp-6.5*
ubuntu/linux-gke<5.15.0-1039.44
5.15.0-1039.44
ubuntu/linux-gkeop<5.15.0-1025.30
5.15.0-1025.30
ubuntu/linux-hwe-5.19*
ubuntu/linux-hwe-6.2*
ubuntu/linux-hwe-6.5*
ubuntu/linux-ibm<5.15.0-1035.38
5.15.0-1035.38
ubuntu/linux-intel-iot-realtime*
ubuntu/linux-intel-iotg<5.15.0-1037.42
5.15.0-1037.42
ubuntu/linux-kvm<5.15.0-1039.44
5.15.0-1039.44
ubuntu/linux-lowlatency<5.15.0-79.88
5.15.0-79.88
ubuntu/linux-lowlatency-hwe-5.19*
ubuntu/linux-lowlatency-hwe-6.2*
ubuntu/linux-lowlatency-hwe-6.5*
ubuntu/linux-nvidia<5.15.0-1030.30
5.15.0-1030.30
ubuntu/linux-nvidia-6.2*
ubuntu/linux-nvidia-6.5*
ubuntu/linux-nvidia-tegra<5.15.0-1016.16
5.15.0-1016.16
ubuntu/linux-nvidia-tegra-igx<5.15.0-1002.2
5.15.0-1002.2
ubuntu/linux-oem-5.17*
ubuntu/linux-oem-6.0*
ubuntu/linux-oem-6.1*
ubuntu/linux-oem-6.5*
ubuntu/linux-oracle<5.15.0-1040.46
5.15.0-1040.46
ubuntu/linux-oracle-6.5*
ubuntu/linux-raspi<5.15.0-1035.38
5.15.0-1035.38
ubuntu/linux-realtime*
ubuntu/linux-riscv*
ubuntu/linux-riscv-5.19*
ubuntu/linux-riscv-6.5*
ubuntu/linux-starfive-5.19*
ubuntu/linux-starfive-6.2*
ubuntu/linux-starfive-6.5*
ubuntu/linux-xilinx-zynqmp<5.15.0-1025.29
5.15.0-1025.29
ubuntu/linux-bluefield<5.15.0-1022.24
5.15.0-1022.24
ubuntu/linux-intel-iot-realtime<5.15.0-1036.38
5.15.0-1036.38
ubuntu/linux-realtime<5.15.0-1043.48
5.15.0-1043.48
ubuntu/linux-fips*
ubuntu/linux-azure-6.11*
ubuntu/linux-gcp-6.11*
ubuntu/linux-hwe-6.11*
ubuntu/linux-lowlatency-hwe-6.11*
ubuntu/linux-nvidia-6.11*
ubuntu/linux-oem-6.11*
ubuntu/linux-oem-6.8*
ubuntu/linux-raspi-realtime*
ubuntu/linux-realtime*
ubuntu/linux-riscv*
ubuntu/linux-riscv-6.14*
ubuntu/linux-vmware*

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 5.4.0-1104.112~18.04.1
  2. Upgrade

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

    Fixed in 5.4.0-1110.116~18.04.1
  3. Upgrade

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

    Fixed in 5.4.0-1107.116~18.04.1
  4. Upgrade

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

    Fixed in 5.4.0-152.169~18.04.1
  5. Upgrade

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

    Fixed in 5.4.0-1051.56~18.04.1
  6. Upgrade

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

    Fixed in 5.4.0-1103.112~18.04.1
  7. Upgrade

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

    Fixed in 5.4.0-1088.99~18.04.1
  8. Upgrade

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

    Fixed in 5.4.0-152.169
  9. Upgrade

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

    Fixed in 5.4.0-1104.112
  10. Upgrade

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

    Fixed in 5.15.0-1041.46~20.04.1
  11. Upgrade

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

    Fixed in 5.4.0-1110.116
  12. Upgrade

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

    Fixed in 5.15.0-1045.52~20.04.1
  13. Upgrade

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

    Fixed in 5.4.0-1065.71
  14. Upgrade

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

    Fixed in 5.4.0-1107.116
  15. Upgrade

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

    Fixed in 5.15.0-1039.47~20.04.1
  16. Upgrade

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

    Fixed in 5.15.0-79.86~20.04.2
  17. Upgrade

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

    Fixed in 5.4.0-1051.56
  18. Upgrade

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

    Fixed in 5.15.0-1036.39~20.04.1
  19. Upgrade

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

    Fixed in 5.15.0-1037.42~20.04.1
  20. Upgrade

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

    Fixed in 5.4.0-1017.18
  21. Upgrade

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

    Fixed in 5.4.0-1093.99
  22. Upgrade

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

    Fixed in 5.15.0-79.88~20.04.1
  23. Upgrade

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

    Fixed in 5.15.0-1016.16~20.04.1
  24. Upgrade

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

    Fixed in 5.4.0-1103.112
  25. Upgrade

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

    Fixed in 5.15.0-1040.46~20.04.1
  26. Upgrade

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

    Fixed in 5.4.0-1088.99
  27. Upgrade

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

    Fixed in 5.15.0-1038.42~20.04.2
  28. Upgrade

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

    Fixed in 5.4.0-1024.28
  29. Upgrade

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

    Fixed in 5.4.0-1104.112+fips1
  30. Upgrade

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

    Fixed in 5.4.0-1110.116+fips1
  31. Upgrade

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

    Fixed in 5.4.0-1079.88
  32. Upgrade

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

    Fixed in 5.4.0-1107.116+fips1
  33. Upgrade

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

    Fixed in 5.15.0-79.86
  34. Upgrade

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

    Fixed in 5.15.0-1042.47
  35. Upgrade

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

    Fixed in 5.15.0-1045.52
  36. Upgrade

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

    Fixed in 5.15.0-1045.52.1
  37. Upgrade

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

    Fixed in 5.15.0-1039.47
  38. Upgrade

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

    Fixed in 5.15.0-1039.44
  39. Upgrade

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

    Fixed in 5.15.0-1025.30
  40. Upgrade

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

    Fixed in 5.15.0-1035.38
  41. Upgrade

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

    Fixed in 5.15.0-1037.42
  42. Upgrade

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

    Fixed in 5.15.0-1039.44
  43. Upgrade

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

    Fixed in 5.15.0-79.88
  44. Upgrade

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

    Fixed in 5.15.0-1030.30
  45. Upgrade

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

    Fixed in 5.15.0-1016.16
  46. Upgrade

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

    Fixed in 5.15.0-1002.2
  47. Upgrade

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

    Fixed in 5.15.0-1040.46
  48. Upgrade

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

    Fixed in 5.15.0-1035.38
  49. Upgrade

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

    Fixed in 5.15.0-1025.29
  50. Upgrade

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

    Fixed in 5.15.0-1022.24
  51. Upgrade

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

    Fixed in 5.15.0-1036.38
  52. Upgrade

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

    Fixed in 5.15.0-1043.48

Event History

Dec 30, 2025
CVE Published
via MITRE·12:23 PM
Data Sourced
via MITRE·12:23 PM
DescriptionSeverity
Data Sourced
via OSV·01:16 PM
DescriptionSeverityAffected Software
Data Sourced
via NVD·01:16 PM
DescriptionSeverity

Frequently Asked Questions

1

What is the severity of CVE-2023-54306?

CVE-2023-54306 has been classified with a sufficient severity level due to its potential to cause hung tasks in the Linux kernel.

2

How do I fix CVE-2023-54306?

To mitigate CVE-2023-54306, update your Linux kernel to the latest stable version where this vulnerability has been resolved.

3

What systems are affected by CVE-2023-54306?

CVE-2023-54306 primarily affects the Linux kernel and associated systems running versions containing the vulnerability.

4

What impact does CVE-2023-54306 have on system performance?

CVE-2023-54306 can lead to performance degradation by causing tasks to hang, preventing forward progress in network communications.

5

Is CVE-2023-54306 being actively exploited?

As of now, there is no public indication that CVE-2023-54306 is being actively exploited in the wild.

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