UBUNTU-CVE-2024-46791: Medium severity ubuntu/linux-hwe-edge vulnerability

Q: Which systems are exposed to this issue?

Systems using the affected Ubuntu kernel packages are exposed when they use the MCP251x CAN controller driver. The listed packages are linux-azure, linux-gcp, linux-gke, linux-gkeop, linux-riscv, linux-realtime, linux-fips, and linux-hwe-edge.

Q: What conditions are required to trigger the deadlock?

The issue requires a race during mcp251x_open(): an interrupt must already have occurred while the driver holds the mcp_lock mutex and is waking the device. The interrupt handler then waits for the same mutex while the opening path waits for the handler to finish.

Q: What is the practical impact if the issue is triggered?

The affected driver can deadlock, preventing completion of the device wake/open operation. The reported CVSS vector indicates local access, low attack complexity, high privileges, no user interaction, and impact to availability.

Published Sep 18, 2024

Updated

In the Linux kernel, the following vulnerability has been resolved: can: mcp251x: fix deadlock if an interrupt occurs during mcp251xopen The mcp251xhwwake() function is called with the mpclock mutex held and disables the interrupt handler so that no interrupts can be processed while waking the device. If an interrupt has already occurred then waiting for the interrupt handler to complete will deadlock because it will be trying to acquire the same mutex. CPU0 CPU1 ---- ---- mcp251xopen() mutexlock(&priv->mcplock) requestthreadedirq() <interrupt> mcp251xcanist() mutexlock(&priv->mcplock) mcp251xhwwake() disableirq() <-- deadlock Use disableirqnosync() instead because the interrupt handler does everything while holding the mutex so it doesn't matter if it's still running.

Affected Software

142 affected componentsFixes 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-5.15<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-gkeop*

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

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade ubuntu/linux-aws-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1072.78~20.04.1
Upgrade
Upgrade ubuntu/linux-azure-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1078.87~20.04.1
Upgrade
Upgrade ubuntu/linux-gcp-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1071.79~20.04.1
Upgrade
Upgrade ubuntu/linux-gkeop-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1055.62~20.04.1
Upgrade
Upgrade ubuntu/linux-hwe-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-125.135~20.04.1
Upgrade
Upgrade ubuntu/linux-ibm-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1065.68~20.04.1
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
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
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
Upgrade
Upgrade ubuntu/linux-oracle-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1070.76~20.04.1
Upgrade
Upgrade ubuntu/linux-riscv-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1068.72~20.04.1
Upgrade
Upgrade ubuntu/linux to a version that resolves this vulnerability.
Fixed in 5.15.0-125.135
Upgrade
Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.
Fixed in 5.15.0-1072.78
Upgrade
Upgrade ubuntu/linux-aws-6.8 to a version that resolves this vulnerability.
Fixed in 6.8.0-1020.22~22.04.1
Upgrade
Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.
Fixed in 5.15.0-1075.84
Upgrade
Upgrade ubuntu/linux-azure-6.8 to a version that resolves this vulnerability.
Fixed in 6.8.0-1020.23~22.04.1
Upgrade
Upgrade ubuntu/linux-azure-fde to a version that resolves this vulnerability.
Fixed in 5.15.0-1076.85.1
Upgrade
Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.
Fixed in 5.15.0-1071.79
Upgrade
Upgrade ubuntu/linux-gcp-6.8 to a version that resolves this vulnerability.
Fixed in 6.8.0-1019.21~22.04.1
Upgrade
Upgrade ubuntu/linux-gke to a version that resolves this vulnerability.
Fixed in 5.15.0-1069.75
Upgrade
Upgrade ubuntu/linux-gkeop to a version that resolves this vulnerability.
Fixed in 5.15.0-1055.62
Upgrade
Upgrade ubuntu/linux-hwe-6.8 to a version that resolves this vulnerability.
Fixed in 6.8.0-50.51~22.04.1
Upgrade
Upgrade ubuntu/linux-ibm to a version that resolves this vulnerability.
Fixed in 5.15.0-1065.68
Upgrade
Upgrade ubuntu/linux-ibm-6.8 to a version that resolves this vulnerability.
Fixed in 6.8.0-1017.17~22.04.1
Upgrade
Upgrade ubuntu/linux-intel-iotg to a version that resolves this vulnerability.
Fixed in 5.15.0-1067.73
Upgrade
Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.
Fixed in 5.15.0-1069.74
Upgrade
Upgrade ubuntu/linux-lowlatency to a version that resolves this vulnerability.
Fixed in 5.15.0-125.135
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
Upgrade
Upgrade ubuntu/linux-nvidia to a version that resolves this vulnerability.
Fixed in 5.15.0-1067.68
Upgrade
Upgrade ubuntu/linux-nvidia-6.8 to a version that resolves this vulnerability.
Fixed in 6.8.0-1019.21~22.04.1
Upgrade
Upgrade ubuntu/linux-nvidia-tegra to a version that resolves this vulnerability.
Fixed in 5.15.0-1032.32
Upgrade
Upgrade ubuntu/linux-nvidia-tegra-igx to a version that resolves this vulnerability.
Fixed in 5.15.0-1020.20
Upgrade
Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.
Fixed in 5.15.0-1070.76
Upgrade
Upgrade ubuntu/linux-oracle-6.8 to a version that resolves this vulnerability.
Fixed in 6.8.0-1017.18~22.04.1
Upgrade
Upgrade ubuntu/linux-raspi to a version that resolves this vulnerability.
Fixed in 5.15.0-1065.68
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
Upgrade
Upgrade ubuntu/linux-xilinx-zynqmp to a version that resolves this vulnerability.
Fixed in 5.15.0-1038.42
Upgrade
Upgrade ubuntu/linux-bluefield to a version that resolves this vulnerability.
Fixed in 5.15.0-1056.58
Upgrade
Upgrade ubuntu/linux-intel-iot-realtime to a version that resolves this vulnerability.
Fixed in 5.15.0-1066.68
Upgrade
Upgrade ubuntu/linux-realtime to a version that resolves this vulnerability.
Fixed in 5.15.0-1073.81
Upgrade
Upgrade ubuntu/linux-realtime-6.8 to a version that resolves this vulnerability.
Fixed in 6.8.1-1013.14~22.04.1
Upgrade
Upgrade ubuntu/linux-aws-fips to a version that resolves this vulnerability.
Fixed in 5.15.0-1072.78+fips1
Upgrade
Upgrade ubuntu/linux-azure-fips to a version that resolves this vulnerability.
Fixed in 5.15.0-1075.84+fips1
Upgrade
Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.
Fixed in 5.15.0-125.135+fips1
Upgrade
Upgrade ubuntu/linux-gcp-fips to a version that resolves this vulnerability.
Fixed in 5.15.0-1071.79+fips1
Upgrade
Upgrade ubuntu/linux to a version that resolves this vulnerability.
Fixed in 6.8.0-50.51
Upgrade
Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.
Fixed in 6.8.0-1020.22
Upgrade
Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.
Fixed in 6.8.0-1020.23
Upgrade
Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.
Fixed in 6.8.0-1019.21
Upgrade
Upgrade ubuntu/linux-gke to a version that resolves this vulnerability.
Fixed in 6.8.0-1015.19
Upgrade
Upgrade ubuntu/linux-gkeop to a version that resolves this vulnerability.
Fixed in 6.8.0-1002.4
Upgrade
Upgrade ubuntu/linux-ibm to a version that resolves this vulnerability.
Fixed in 6.8.0-1017.17
Upgrade
Upgrade ubuntu/linux-lowlatency to a version that resolves this vulnerability.
Fixed in 6.8.0-50.51.1
Upgrade
Upgrade ubuntu/linux-nvidia to a version that resolves this vulnerability.
Fixed in 6.8.0-1019.21
Upgrade
Upgrade ubuntu/linux-nvidia-lowlatency to a version that resolves this vulnerability.
Fixed in 6.8.0-1019.21.1
Upgrade
Upgrade ubuntu/linux-oem-6.8 to a version that resolves this vulnerability.
Fixed in 6.8.0-1018.18
Upgrade
Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.
Fixed in 6.8.0-1017.18
Upgrade
Upgrade ubuntu/linux-raspi to a version that resolves this vulnerability.
Fixed in 6.8.0-1016.18
Upgrade
Upgrade ubuntu/linux-riscv to a version that resolves this vulnerability.
Fixed in 6.8.0-50.51.1
Upgrade
Upgrade ubuntu/linux-xilinx to a version that resolves this vulnerability.
Fixed in 6.8.0-1017.18
Upgrade
Upgrade ubuntu/linux-raspi-realtime to a version that resolves this vulnerability.
Fixed in 6.8.0-2015.16
Upgrade
Upgrade ubuntu/linux-realtime to a version that resolves this vulnerability.
Fixed in 6.8.1-1013.14
Upgrade
Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.
Fixed in 6.8.0-78.78+fips1
Configuration
Replace disable_irq() with disable_irq_nosync() in mcp251x_hw_wake() because the function holds the mcp_lock mutex and waiting for the interrupt handler can deadlock.
Linux kernel mcp251x CAN driver Interrupt disabling in mcp251x_hw_wake() = disable_irq_nosync()

Event History

Sep 18, 2024

CVE Published

via OSV·08:15 AM

Data Sourced

via OSV·08:15 AM

DescriptionSeverityAffected Software

Frequently Asked Questions

Which systems are exposed to this issue?

Systems using the affected Ubuntu kernel packages are exposed when they use the MCP251x CAN controller driver. The listed packages are linux-azure, linux-gcp, linux-gke, linux-gkeop, linux-riscv, linux-realtime, linux-fips, and linux-hwe-edge.

What conditions are required to trigger the deadlock?

The issue requires a race during mcp251x_open(): an interrupt must already have occurred while the driver holds the mcp_lock mutex and is waking the device. The interrupt handler then waits for the same mutex while the opening path waits for the handler to finish.

What is the practical impact if the issue is triggered?

The affected driver can deadlock, preventing completion of the device wake/open operation. The reported CVSS vector indicates local access, low attack complexity, high privileges, no user interaction, and impact to availability.

UBUNTU-CVE-2024-46791: Medium severity ubuntu/linux-hwe-edge vulnerability

Affected Software

Remediation

Event History

Frequently Asked Questions

Which systems are exposed to this issue?

What conditions are required to trigger the deadlock?

What is the practical impact if the issue is triggered?

Company

Resources

Contact

Frequently Asked Questions

Which systems are exposed to this issue?

What conditions are required to trigger the deadlock?

What is the practical impact if the issue is triggered?