CVE-2023-54318: net/smc: use smc_lgr_list.lock to protect smc_lgr_list.list iterate in smcr_port_add

Published Dec 30, 2025
·
Updated

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

net/smc: use smclgrlist.lock to protect smclgrlist.list iterate in smcrportadd

While doing smcrportadd, there maybe linkgroup add into or delete from smclgrlist.list at the same time, which may result kernel crash. So, use smclgrlist.lock to protect smclgrlist.list iterate in smcrportadd.

The crash calltrace show below: BUG: kernel NULL pointer dereference, address: 0000000000000000 PGD 0 P4D 0 Oops: 0000 [#1] SMP NOPTI CPU: 0 PID: 559726 Comm: kworker/0:92 Kdump: loaded Tainted: G Hardware name: Alibaba Cloud Alibaba Cloud ECS, BIOS 449e491 04/01/2014 Workqueue: events smcibporteventwork [smc] RIP: 0010:smcrportadd+0xa6/0xf0 [smc] RSP: 0000:ffffa5a2c8f67de0 EFLAGS: 00010297 RAX: 0000000000000001 RBX: ffff9935e0650000 RCX: 0000000000000000 RDX: 0000000000000010 RSI: ffff9935e0654290 RDI: ffff9935c8560000 RBP: 0000000000000000 R08: 0000000000000000 R09: ffff9934c0401918 R10: 0000000000000000 R11: ffffffffb4a5c278 R12: ffff99364029aae4 R13: ffff99364029aa00 R14: 00000000ffffffed R15: ffff99364029ab08 FS: 0000000000000000(0000) GS:ffff994380600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000f06a10003 CR4: 0000000002770ef0 PKRU: 55555554 Call Trace: smcibporteventwork+0x18f/0x380 [smc] processonework+0x19b/0x340 workerthread+0x30/0x370 ? processonework+0x340/0x340 kthread+0x114/0x130 ? kthreadcancelwork+0x50/0x50 retfromfork+0x1f/0x30

Affected Software

127 affected componentsFixes available
linux/kernel
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-hwe-edge*
ubuntu/linux-oem*
ubuntu/linux-oracle-5.0*
ubuntu/linux-oracle-5.3*
ubuntu/linux-aws-5.15<5.15.0-1053.58~20.04.1
5.15.0-1053.58~20.04.1
ubuntu/linux-azure-5.15<5.15.0-1056.64~20.04.1
5.15.0-1056.64~20.04.1
ubuntu/linux-gcp-5.15<5.15.0-1051.59~20.04.1
5.15.0-1051.59~20.04.1
ubuntu/linux-hwe-5.15<5.15.0-94.104~20.04.1
5.15.0-94.104~20.04.1
ubuntu/linux-ibm-5.15<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-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-5.15<5.15.0-1051.57~20.04.1
5.15.0-1051.57~20.04.1
ubuntu/linux-riscv-5.15<5.15.0-1049.53~20.04.2
5.15.0-1049.53~20.04.2
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<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*
ubuntu/linux-ibm<5.15.0-1046.49
5.15.0-1046.49
ubuntu/linux-intel-iot-realtime*
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*
ubuntu/linux-nvidia<5.15.0-1044.44
5.15.0-1044.44
ubuntu/linux-nvidia-6.2*
ubuntu/linux-nvidia-6.5*
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*
ubuntu/linux-oem-6.5*
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-riscv-6.5*
ubuntu/linux-starfive-5.19*
ubuntu/linux-starfive-6.2*
ubuntu/linux-starfive-6.5*
ubuntu/linux-xilinx-zynqmp<5.15.0-1027.31
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-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-5.15 to a version that resolves this vulnerability.

    Fixed in 5.15.0-1053.58~20.04.1
  2. Upgrade

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

    Fixed in 5.15.0-1056.64~20.04.1
  3. Upgrade

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

    Fixed in 5.15.0-1051.59~20.04.1
  4. Upgrade

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

    Fixed in 5.15.0-94.104~20.04.1
  5. Upgrade

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

    Fixed in 5.15.0-1046.49~20.04.1
  6. 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
  7. 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
  8. 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
  9. Upgrade

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

    Fixed in 5.15.0-1051.57~20.04.1
  10. Upgrade

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

    Fixed in 5.15.0-1049.53~20.04.2
  11. Upgrade

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

    Fixed in 5.15.0-94.104
  12. Upgrade

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

    Fixed in 5.15.0-1053.58
  13. Upgrade

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

    Fixed in 5.15.0-1056.64
  14. Upgrade

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

    Fixed in 5.15.0-1056.64.1
  15. Upgrade

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

    Fixed in 5.15.0-1051.59
  16. Upgrade

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

    Fixed in 5.15.0-1050.55
  17. Upgrade

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

    Fixed in 5.15.0-1036.42
  18. Upgrade

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

    Fixed in 5.15.0-1046.49
  19. Upgrade

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

    Fixed in 5.15.0-1047.53
  20. Upgrade

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

    Fixed in 5.15.0-1050.55
  21. Upgrade

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

    Fixed in 5.15.0-94.104
  22. Upgrade

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

    Fixed in 5.15.0-1044.44
  23. Upgrade

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

    Fixed in 5.15.0-1022.22
  24. Upgrade

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

    Fixed in 5.15.0-1009.9
  25. Upgrade

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

    Fixed in 5.15.0-1051.57
  26. Upgrade

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

    Fixed in 5.15.0-1046.49
  27. Upgrade

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

    Fixed in 5.15.0-1027.31
  28. Upgrade

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

    Fixed in 5.15.0-1035.37
  29. Upgrade

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

    Fixed in 5.15.0-1046.48
  30. Upgrade

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

    Fixed in 5.15.0-1054.60
  31. Upgrade

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

    Fixed in 5.15.0-1053.58+fips1
  32. Upgrade

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

    Fixed in 5.15.0-94.104+fips1
  33. Upgrade

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

    Fixed in 5.15.0-1055.63+fips2
  34. Compensating control

    In net/smc, use smc_lgr_list.lock to protect iteration over smc_lgr_list.list in smcr_port_add, preventing concurrent linkgroup additions or deletions from causing a kernel crash.

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-2023-54318?

CVE-2023-54318 is classified as a medium severity vulnerability in the Linux kernel.

2

How do I fix CVE-2023-54318?

To fix CVE-2023-54318, upgrade to the patched version of the Linux kernel that contains the resolutions for this vulnerability.

3

What is the impact of CVE-2023-54318?

The impact of CVE-2023-54318 can result in potential kernel instability due to race conditions during simultaneous linkgroup modifications.

4

Which versions of the Linux kernel are affected by CVE-2023-54318?

CVE-2023-54318 affects several versions of the Linux kernel prior to the patch, though specific version details may vary.

5

Is CVE-2023-54318 related to any specific feature in the Linux kernel?

Yes, CVE-2023-54318 is related to the socket memory control (SMC) feature in the Linux kernel.

Company

Resources

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