CVE-2024-46742: smb/server: fix potential null-ptr-deref of lease_ctx_info in smb2_open()

Published Sep 18, 2024
·
Updated

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

smb/server: fix potential null-ptr-deref of leasectxinfo in smb2open()

null-ptr-deref will occur when (reqoplevel == SMB2OPLOCKLEVELLEASE) and parseleasestate() return NULL.

Fix this by check if 'leasectxinfo' is NULL.

Additionally, remove the redundant parentheses in parsedurablehandlecontext().

Affected Software

168 affected componentsFixes available
Linux Linux kernel<6.6.51
Linux Linux kernel>=6.7<6.10.10
Linux Linux kernel=6.11-rc1
Linux Linux kernel=6.11-rc2
Linux Linux kernel=6.11-rc3
Linux Linux kernel=6.11-rc4
Microsoft cbl2 kernel 5.15.180.1-1
Microsoft cbl2 kernel 5.15.180.1-1
Patch available
Microsoft azl3 kernel 6.6.47.1-1
Patch available
Microsoft azl3 kernel 6.6.51.1-5
Patch available
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-5.11*
ubuntu/linux-aws-5.13*
ubuntu/linux-aws-5.15<5.15.0-1088.95~20.04.1
5.15.0-1088.95~20.04.1
ubuntu/linux-aws-5.8*
ubuntu/linux-azure-5.11*
ubuntu/linux-azure-5.13*
ubuntu/linux-azure-5.15<5.15.0-1094.103~20.04.1
5.15.0-1094.103~20.04.1
ubuntu/linux-azure-5.8*
ubuntu/linux-azure-fde*
ubuntu/linux-gcp-5.11*
ubuntu/linux-gcp-5.13*
ubuntu/linux-gcp-5.15<5.15.0-1087.96~20.04.2
5.15.0-1087.96~20.04.2
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-5.15<5.15.0-144.157~20.04.1
5.15.0-144.157~20.04.1
ubuntu/linux-hwe-5.8*
ubuntu/linux-ibm-5.15<5.15.0-1080.83~20.04.1
5.15.0-1080.83~20.04.1
ubuntu/linux-intel-5.13*
ubuntu/linux-intel-iotg-5.15<5.15.0-1083.89~20.04.1
5.15.0-1083.89~20.04.1
ubuntu/linux-lowlatency-hwe-5.15<5.15.0-144.157~20.04.1
5.15.0-144.157~20.04.1
ubuntu/linux-nvidia-tegra-5.15<5.15.0-1041.41~20.04.1
5.15.0-1041.41~20.04.1
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-5.15<5.15.0-1085.91~20.04.3
5.15.0-1085.91~20.04.3
ubuntu/linux-oracle-5.8*
ubuntu/linux-raspi2*
ubuntu/linux-riscv*
ubuntu/linux-riscv-5.11*
ubuntu/linux-riscv-5.15<5.15.0-1083.87~20.04.1
5.15.0-1083.87~20.04.1
ubuntu/linux-riscv-5.8*
ubuntu/linux<5.15.0-144.157
5.15.0-144.157
ubuntu/linux-allwinner-5.19*
ubuntu/linux-aws<5.15.0-1088.95
5.15.0-1088.95
ubuntu/linux-aws-5.19*
ubuntu/linux-aws-6.2*
ubuntu/linux-aws-6.5*
ubuntu/linux-aws-6.8*
ubuntu/linux-azure<5.15.0-1094.103
5.15.0-1094.103
ubuntu/linux-azure-5.19*
ubuntu/linux-azure-6.2*
ubuntu/linux-azure-6.5*
ubuntu/linux-azure-6.8*
ubuntu/linux-azure-fde<5.15.0-1094.103.1
5.15.0-1094.103.1
ubuntu/linux-azure-fde-5.19*
ubuntu/linux-azure-fde-6.2*
ubuntu/linux-azure-fde-6.8*
ubuntu/linux-gcp<5.15.0-1087.96
5.15.0-1087.96
ubuntu/linux-gcp-5.19*
ubuntu/linux-gcp-6.2*
ubuntu/linux-gcp-6.5*
ubuntu/linux-gcp-6.8*
ubuntu/linux-gke<5.15.0-1085.91
5.15.0-1085.91
ubuntu/linux-gkeop<5.15.0-1070.78
5.15.0-1070.78
ubuntu/linux-hwe-5.19*
ubuntu/linux-hwe-6.2*
ubuntu/linux-hwe-6.5*
ubuntu/linux-ibm<5.15.0-1080.83
5.15.0-1080.83
ubuntu/linux-ibm-6.8*
ubuntu/linux-intel-iot-realtime*
ubuntu/linux-intel-iotg<5.15.0-1083.89
5.15.0-1083.89
ubuntu/linux-kvm<5.15.0-1084.89
5.15.0-1084.89
ubuntu/linux-lowlatency<5.15.0-144.157
5.15.0-144.157
ubuntu/linux-lowlatency-hwe-5.19*
ubuntu/linux-lowlatency-hwe-6.2*
ubuntu/linux-lowlatency-hwe-6.5*
ubuntu/linux-lowlatency-hwe-6.8*
ubuntu/linux-nvidia<5.15.0-1082.83
5.15.0-1082.83
ubuntu/linux-nvidia-6.2*
ubuntu/linux-nvidia-6.5*
ubuntu/linux-nvidia-6.8*
ubuntu/linux-nvidia-tegra<5.15.0-1041.41
5.15.0-1041.41
ubuntu/linux-nvidia-tegra-igx<5.15.0-1030.30
5.15.0-1030.30
ubuntu/linux-oem-5.17*
ubuntu/linux-oem-6.0*
ubuntu/linux-oem-6.1*
ubuntu/linux-oem-6.5*
ubuntu/linux-oracle<5.15.0-1085.91
5.15.0-1085.91
ubuntu/linux-oracle-6.5*
ubuntu/linux-oracle-6.8*
ubuntu/linux-raspi<5.15.0-1083.86
5.15.0-1083.86
ubuntu/linux-realtime*
ubuntu/linux-riscv*
ubuntu/linux-riscv-5.19*
ubuntu/linux-riscv-6.5*
ubuntu/linux-riscv-6.8*
ubuntu/linux-starfive-5.19*
ubuntu/linux-starfive-6.2*
ubuntu/linux-starfive-6.5*
ubuntu/linux-xilinx-zynqmp<5.15.0-1052.56
5.15.0-1052.56
ubuntu/linux-bluefield<5.15.0-1072.74
5.15.0-1072.74
ubuntu/linux-intel-iot-realtime<5.15.0-1081.83
5.15.0-1081.83
ubuntu/linux-realtime<5.15.0-1088.97
5.15.0-1088.97
ubuntu/linux-realtime-6.8*
ubuntu/linux-aws-fips*
ubuntu/linux-azure-fips*
ubuntu/linux-fips*
ubuntu/linux-gcp-fips*
ubuntu/linux-aws-fips<5.15.0-1088.95+fips1
5.15.0-1088.95+fips1
ubuntu/linux-azure-fips<5.15.0-1094.103+fips1
5.15.0-1094.103+fips1
ubuntu/linux-fips<5.15.0-144.157+fips1
5.15.0-144.157+fips1
ubuntu/linux-gcp-fips<5.15.0-1087.96+fips1
5.15.0-1087.96+fips1
ubuntu/linux*
ubuntu/linux-aws*
ubuntu/linux-azure*
ubuntu/linux-azure-fde*
ubuntu/linux-azure-nvidia*
ubuntu/linux-gcp*
ubuntu/linux-gke*
ubuntu/linux-gkeop*
ubuntu/linux-ibm*
ubuntu/linux-intel*
ubuntu/linux-lowlatency*
ubuntu/linux-nvidia*
ubuntu/linux-nvidia-lowlatency*
ubuntu/linux-nvidia-tegra*
ubuntu/linux-oem-6.8*
ubuntu/linux-oracle*
ubuntu/linux-raspi*
ubuntu/linux-raspi-realtime*
ubuntu/linux-realtime*
ubuntu/linux-riscv*
ubuntu/linux-vmware*
ubuntu/linux-xilinx*
ubuntu/linux-bluefield*
ubuntu/linux-raspi-realtime*
ubuntu/linux-realtime*
ubuntu/linux-aws-fips*
ubuntu/linux-azure-fips*
ubuntu/linux-fips*
ubuntu/linux-gcp-fips*
debian/linux
6.1.176-16.1.190-16.12.107-16.12.115-27.2.12-17.2.15-1
debian/linux<6.1.135-1
6.1.135-1
debian/linux<6.10.11-1
6.10.11-1
debian/linux<6.10.11-1
6.10.11-1

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 5.15.0-1088.95~20.04.1
  2. Upgrade

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

    Fixed in 5.15.0-1094.103~20.04.1
  3. Upgrade

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

    Fixed in 5.15.0-1087.96~20.04.2
  4. Upgrade

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

    Fixed in 5.15.0-144.157~20.04.1
  5. Upgrade

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

    Fixed in 5.15.0-1080.83~20.04.1
  6. Upgrade

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

    Fixed in 5.15.0-1083.89~20.04.1
  7. Upgrade

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

    Fixed in 5.15.0-144.157~20.04.1
  8. Upgrade

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

    Fixed in 5.15.0-1041.41~20.04.1
  9. Upgrade

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

    Fixed in 5.15.0-1085.91~20.04.3
  10. Upgrade

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

    Fixed in 5.15.0-1083.87~20.04.1
  11. Upgrade

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

    Fixed in 5.15.0-144.157
  12. Upgrade

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

    Fixed in 5.15.0-1088.95
  13. Upgrade

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

    Fixed in 5.15.0-1094.103
  14. Upgrade

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

    Fixed in 5.15.0-1094.103.1
  15. Upgrade

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

    Fixed in 5.15.0-1087.96
  16. Upgrade

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

    Fixed in 5.15.0-1085.91
  17. Upgrade

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

    Fixed in 5.15.0-1070.78
  18. Upgrade

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

    Fixed in 5.15.0-1080.83
  19. Upgrade

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

    Fixed in 5.15.0-1083.89
  20. Upgrade

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

    Fixed in 5.15.0-1084.89
  21. Upgrade

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

    Fixed in 5.15.0-144.157
  22. Upgrade

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

    Fixed in 5.15.0-1082.83
  23. Upgrade

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

    Fixed in 5.15.0-1041.41
  24. Upgrade

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

    Fixed in 5.15.0-1030.30
  25. Upgrade

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

    Fixed in 5.15.0-1085.91
  26. Upgrade

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

    Fixed in 5.15.0-1083.86
  27. Upgrade

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

    Fixed in 5.15.0-1052.56
  28. Upgrade

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

    Fixed in 5.15.0-1072.74
  29. Upgrade

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

    Fixed in 5.15.0-1081.83
  30. Upgrade

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

    Fixed in 5.15.0-1088.97
  31. Upgrade

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

    Fixed in 5.15.0-1088.95+fips1
  32. Upgrade

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

    Fixed in 5.15.0-1094.103+fips1
  33. Upgrade

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

    Fixed in 5.15.0-144.157+fips1
  34. Upgrade

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

    Fixed in 5.15.0-1087.96+fips1
  35. 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
  36. Upgrade

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

    Fixed in 6.1.135-1
  37. Upgrade

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

    Fixed in 6.10.11-1
  38. Compensating control

    In Linux kernel smb/server, update smb2_open() to check whether lease_ctx_info is NULL before dereferencing it, and remove the redundant parentheses in parse_durable_handle_context().

Event History

Sep 18, 2024
CVE Published
via MITRE·07:12 AM
Data Sourced
via MITRE·07:12 AM
Description
Data Sourced
via OSV·08:15 AM
DescriptionSeverityAffected Software
Data Sourced
via NVD·08:15 AM
RemedyDescriptionSeverityWeaknessAffected Software
Oct 16, 2024
Data Sourced
via Microsoft·07:00 AM
DescriptionSeverityWeaknessAffected 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-2024-46742?

CVE-2024-46742 is a critical vulnerability that can lead to potential null pointer dereference in the Linux kernel.

2

How do I fix CVE-2024-46742?

To address CVE-2024-46742, upgrade the Linux kernel to version 6.6.51 or ensure you are using versions that are not affected.

3

Which versions of Linux kernel are affected by CVE-2024-46742?

CVE-2024-46742 affects Linux kernel versions from 6.7 up to but not including 6.6.51, as well as specific 6.11 release candidates.

4

What component in the Linux kernel is impacted by CVE-2024-46742?

CVE-2024-46742 impacts the SMB server component within the Linux kernel.

5

Is there a workaround for CVE-2024-46742?

There is no documented workaround for CVE-2024-46742; updating the kernel is the recommended mitigation.

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