UBUNTU-CVE-2023-52439: Use After Free

Q: What level of access does an attacker need?

Exploitation requires local access with low privileges. No user interaction is required.

Q: What condition triggers the flaw?

The issue depends on a race between opening a UIO device and unregistering that device. An open path can obtain a device reference after unregistration has begun, leading to use-after-free and a later double free.

Q: What is the potential impact of successful exploitation?

The severity data rates confidentiality, integrity, and availability impact as high. The issue is classified as a use-after-free.

Published Feb 20, 2024

Updated

In the Linux kernel, the following vulnerability has been resolved: uio: Fix use-after-free in uioopen core-1 core-2 ------------------------------------------------------- uiounregisterdevice uioopen idev = idrfind() deviceunregister(&idev->dev) putdevice(&idev->dev) uiodevicerelease getdevice(&idev->dev) kfree(idev) uiofreeminor(minor) uiorelease putdevice(&idev->dev) kfree(idev) ------------------------------------------------------- In the core-1 uiounregisterdevice(), the deviceunregister will kfree idev when the idev->dev kobject ref is 1. But after core-1 deviceunregister, putdevice and before doing kfree, the core-2 may getdevice. Then: 1. After core-1 kfree idev, the core-2 will do use-after-free for idev. 2. When core-2 do uiorelease and putdevice, the idev will be double freed. To address this issue, we can get idev atomic & inc idev reference with minorlock.

Affected Software

159 affected componentsFixes available

ubuntu/linux-azure<4.15.0-1177.192~14.04.1

4.15.0-1177.192~14.04.1

ubuntu/linux-aws-hwe<4.15.0-1168.181~16.04.1

4.15.0-1168.181~16.04.1

ubuntu/linux-azure<4.15.0-1177.192~16.04.1

4.15.0-1177.192~16.04.1

ubuntu/linux-gcp<4.15.0-1162.179~16.04.1

4.15.0-1162.179~16.04.1

ubuntu/linux-hwe<4.15.0-225.237~16.04.1

4.15.0-225.237~16.04.1

ubuntu/linux-oracle<4.15.0-1131.142~16.04.1

4.15.0-1131.142~16.04.1

ubuntu/linux-hwe-edge*

ubuntu/linux<4.15.0-225.237

4.15.0-225.237

ubuntu/linux-aws<4.15.0-1168.181

4.15.0-1168.181

ubuntu/linux-aws-5.0*

ubuntu/linux-aws-5.3*

ubuntu/linux-aws-5.4<5.4.0-1122.132~18.04.1

5.4.0-1122.132~18.04.1

ubuntu/linux-azure*

ubuntu/linux-azure-4.15<4.15.0-1177.192

4.15.0-1177.192

ubuntu/linux-azure-5.3*

ubuntu/linux-azure-5.4<5.4.0-1127.134~18.04.1

5.4.0-1127.134~18.04.1

ubuntu/linux-azure-edge*

ubuntu/linux-gcp*

ubuntu/linux-gcp-4.15<4.15.0-1162.179

4.15.0-1162.179

ubuntu/linux-gcp-5.3*

ubuntu/linux-gcp-5.4<5.4.0-1126.135~18.04.1

5.4.0-1126.135~18.04.1

ubuntu/linux-gke-4.15*

ubuntu/linux-gke-5.4*

ubuntu/linux-gkeop-5.4*

ubuntu/linux-hwe*

ubuntu/linux-hwe-5.4<5.4.0-175.195~18.04.1

5.4.0-175.195~18.04.1

ubuntu/linux-hwe-edge*

ubuntu/linux-ibm-5.4<5.4.0-1069.74~18.04.1

5.4.0-1069.74~18.04.1

ubuntu/linux-kvm<4.15.0-1152.157

4.15.0-1152.157

ubuntu/linux-oem*

ubuntu/linux-oracle<4.15.0-1131.142

4.15.0-1131.142

ubuntu/linux-oracle-5.0*

ubuntu/linux-oracle-5.3*

ubuntu/linux-oracle-5.4<5.4.0-1121.130~18.04.1

5.4.0-1121.130~18.04.1

ubuntu/linux-raspi-5.4<5.4.0-1106.118~18.04.1

5.4.0-1106.118~18.04.1

ubuntu/linux-aws-fips<4.15.0-2107.113

4.15.0-2107.113

ubuntu/linux-azure-fips<4.15.0-2086.92

4.15.0-2086.92

ubuntu/linux-fips<4.15.0-1123.134

4.15.0-1123.134

ubuntu/linux-gcp-fips<4.15.0-2070.75

4.15.0-2070.75

ubuntu/linux-fips*

ubuntu/linux<5.4.0-176.196

5.4.0-176.196

ubuntu/linux-aws<5.4.0-1122.132

5.4.0-1122.132

ubuntu/linux-aws-5.15<5.15.0-1057.63~20.04.1

5.15.0-1057.63~20.04.1

ubuntu/linux-azure<5.4.0-1127.134

5.4.0-1127.134

ubuntu/linux-azure-5.15<5.15.0-1060.69~20.04.1

5.15.0-1060.69~20.04.1

ubuntu/linux-bluefield<5.4.0-1082.89

5.4.0-1082.89

ubuntu/linux-gcp<5.4.0-1126.135

5.4.0-1126.135

ubuntu/linux-gcp-5.15<5.15.0-1055.63~20.04.1

5.15.0-1055.63~20.04.1

ubuntu/linux-gkeop<5.4.0-1089.93

5.4.0-1089.93

ubuntu/linux-gkeop-5.15<5.15.0-1040.46~20.04.1

5.15.0-1040.46~20.04.1

ubuntu/linux-hwe-5.15<5.15.0-102.112~20.04.1

5.15.0-102.112~20.04.1

ubuntu/linux-ibm<5.4.0-1069.74

5.4.0-1069.74

ubuntu/linux-ibm-5.15<5.15.0-1050.53~20.04.1

5.15.0-1050.53~20.04.1

ubuntu/linux-intel-iotg-5.15<5.15.0-1052.58~20.04.1

5.15.0-1052.58~20.04.1

ubuntu/linux-iot<5.4.0-1034.35

5.4.0-1034.35

ubuntu/linux-kvm<5.4.0-1110.117

5.4.0-1110.117

ubuntu/linux-lowlatency-hwe-5.15<5.15.0-102.112~20.04.1

5.15.0-102.112~20.04.1

ubuntu/linux-nvidia-tegra-5.15<5.15.0-1025.25~20.04.1

5.15.0-1025.25~20.04.1

ubuntu/linux-oracle<5.4.0-1121.130

5.4.0-1121.130

ubuntu/linux-oracle-5.15<5.15.0-1055.61~20.04.1

5.15.0-1055.61~20.04.1

ubuntu/linux-raspi<5.4.0-1106.118

5.4.0-1106.118

ubuntu/linux-riscv-5.15<5.15.0-1053.57~20.04.1

5.15.0-1053.57~20.04.1

ubuntu/linux-xilinx-zynqmp<5.4.0-1041.45

5.4.0-1041.45

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-aws-fips<5.4.0-1122.132+fips1

5.4.0-1122.132+fips1

ubuntu/linux-azure-fips<5.4.0-1127.134+fips1

5.4.0-1127.134+fips1

ubuntu/linux-fips<5.4.0-1096.106

5.4.0-1096.106

ubuntu/linux-gcp-fips<5.4.0-1126.135+fips1

5.4.0-1126.135+fips1

ubuntu/linux-aws-fips*

ubuntu/linux-azure-fips*

ubuntu/linux-fips*

ubuntu/linux-gcp-fips*

ubuntu/linux<5.15.0-102.112

5.15.0-102.112

ubuntu/linux-allwinner-5.19*

ubuntu/linux-aws<5.15.0-1057.63

5.15.0-1057.63

ubuntu/linux-aws-5.19*

ubuntu/linux-aws-6.2*

ubuntu/linux-aws-6.5*

ubuntu/linux-azure<5.15.0-1060.69

5.15.0-1060.69

ubuntu/linux-azure-5.19*

ubuntu/linux-azure-6.2*

ubuntu/linux-azure-6.5*

ubuntu/linux-azure-fde<5.15.0-1060.69.1

5.15.0-1060.69.1

ubuntu/linux-azure-fde-5.19*

ubuntu/linux-azure-fde-6.2*

ubuntu/linux-gcp<5.15.0-1055.63

5.15.0-1055.63

ubuntu/linux-gcp-5.19*

ubuntu/linux-gcp-6.2*

ubuntu/linux-gcp-6.5*

ubuntu/linux-gke<5.15.0-1054.59

5.15.0-1054.59

ubuntu/linux-gkeop<5.15.0-1040.46

5.15.0-1040.46

ubuntu/linux-hwe-5.19*

ubuntu/linux-hwe-6.2*

ubuntu/linux-hwe-6.5*

ubuntu/linux-ibm<5.15.0-1050.53

5.15.0-1050.53

ubuntu/linux-intel-iotg<5.15.0-1052.58

5.15.0-1052.58

ubuntu/linux-kvm<5.15.0-1054.59

5.15.0-1054.59

ubuntu/linux-lowlatency<5.15.0-102.112

5.15.0-102.112

ubuntu/linux-lowlatency-hwe-5.19*

ubuntu/linux-lowlatency-hwe-6.2*

ubuntu/linux-lowlatency-hwe-6.5*

ubuntu/linux-nvidia<5.15.0-1048.48

5.15.0-1048.48

ubuntu/linux-nvidia-6.2*

ubuntu/linux-nvidia-6.5<6.5.0-1014.14

6.5.0-1014.14

ubuntu/linux-nvidia-tegra<5.15.0-1025.25

5.15.0-1025.25

ubuntu/linux-nvidia-tegra-igx<5.15.0-1012.12

5.15.0-1012.12

ubuntu/linux-oem-5.17*

ubuntu/linux-oem-6.0*

ubuntu/linux-oem-6.1<6.1.0-1035.35

6.1.0-1035.35

ubuntu/linux-oem-6.5*

ubuntu/linux-oracle<5.15.0-1055.61

5.15.0-1055.61

ubuntu/linux-oracle-6.5*

ubuntu/linux-raspi<5.15.0-1050.53

5.15.0-1050.53

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<5.15.0-1030.34

5.15.0-1030.34

ubuntu/linux-bluefield<5.15.0-1040.42

5.15.0-1040.42

ubuntu/linux-intel-iot-realtime<5.15.0-1050.52

5.15.0-1050.52

ubuntu/linux-realtime<5.15.0-1058.66

5.15.0-1058.66

ubuntu/linux-aws-fips*

ubuntu/linux-azure-fips*

ubuntu/linux-fips*

ubuntu/linux-gcp-fips*

ubuntu/linux-aws-fips<5.15.0-1057.63+fips1

5.15.0-1057.63+fips1

ubuntu/linux-azure-fips<5.15.0-1060.69+fips1

5.15.0-1060.69+fips1

ubuntu/linux-fips<5.15.0-102.112+fips1

5.15.0-102.112+fips1

ubuntu/linux-gcp-fips<5.15.0-1055.63+fips2

5.15.0-1055.63+fips2

ubuntu/linux-raspi-realtime<6.8.0-2001.1

6.8.0-2001.1

ubuntu/linux-vmware*

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.
Fixed in 4.15.0-1177.192~14.04.1
Upgrade
Upgrade ubuntu/linux-aws-hwe to a version that resolves this vulnerability.
Fixed in 4.15.0-1168.181~16.04.1
Upgrade
Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.
Fixed in 4.15.0-1177.192~16.04.1
Upgrade
Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.
Fixed in 4.15.0-1162.179~16.04.1
Upgrade
Upgrade ubuntu/linux-hwe to a version that resolves this vulnerability.
Fixed in 4.15.0-225.237~16.04.1
Upgrade
Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.
Fixed in 4.15.0-1131.142~16.04.1
Upgrade
Upgrade ubuntu/linux to a version that resolves this vulnerability.
Fixed in 4.15.0-225.237
Upgrade
Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.
Fixed in 4.15.0-1168.181
Upgrade
Upgrade ubuntu/linux-aws-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1122.132~18.04.1
Upgrade
Upgrade ubuntu/linux-azure-4.15 to a version that resolves this vulnerability.
Fixed in 4.15.0-1177.192
Upgrade
Upgrade ubuntu/linux-azure-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1127.134~18.04.1
Upgrade
Upgrade ubuntu/linux-gcp-4.15 to a version that resolves this vulnerability.
Fixed in 4.15.0-1162.179
Upgrade
Upgrade ubuntu/linux-gcp-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1126.135~18.04.1
Upgrade
Upgrade ubuntu/linux-hwe-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-175.195~18.04.1
Upgrade
Upgrade ubuntu/linux-ibm-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1069.74~18.04.1
Upgrade
Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.
Fixed in 4.15.0-1152.157
Upgrade
Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.
Fixed in 4.15.0-1131.142
Upgrade
Upgrade ubuntu/linux-oracle-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1121.130~18.04.1
Upgrade
Upgrade ubuntu/linux-raspi-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1106.118~18.04.1
Upgrade
Upgrade ubuntu/linux-aws-fips to a version that resolves this vulnerability.
Fixed in 4.15.0-2107.113
Upgrade
Upgrade ubuntu/linux-azure-fips to a version that resolves this vulnerability.
Fixed in 4.15.0-2086.92
Upgrade
Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.
Fixed in 4.15.0-1123.134
Upgrade
Upgrade ubuntu/linux-gcp-fips to a version that resolves this vulnerability.
Fixed in 4.15.0-2070.75
Upgrade
Upgrade ubuntu/linux to a version that resolves this vulnerability.
Fixed in 5.4.0-176.196
Upgrade
Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.
Fixed in 5.4.0-1122.132
Upgrade
Upgrade ubuntu/linux-aws-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1057.63~20.04.1
Upgrade
Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.
Fixed in 5.4.0-1127.134
Upgrade
Upgrade ubuntu/linux-azure-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1060.69~20.04.1
Upgrade
Upgrade ubuntu/linux-bluefield to a version that resolves this vulnerability.
Fixed in 5.4.0-1082.89
Upgrade
Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.
Fixed in 5.4.0-1126.135
Upgrade
Upgrade ubuntu/linux-gcp-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1055.63~20.04.1
Upgrade
Upgrade ubuntu/linux-gkeop to a version that resolves this vulnerability.
Fixed in 5.4.0-1089.93
Upgrade
Upgrade ubuntu/linux-gkeop-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1040.46~20.04.1
Upgrade
Upgrade ubuntu/linux-hwe-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-102.112~20.04.1
Upgrade
Upgrade ubuntu/linux-ibm to a version that resolves this vulnerability.
Fixed in 5.4.0-1069.74
Upgrade
Upgrade ubuntu/linux-ibm-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1050.53~20.04.1
Upgrade
Upgrade ubuntu/linux-intel-iotg-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1052.58~20.04.1
Upgrade
Upgrade ubuntu/linux-iot to a version that resolves this vulnerability.
Fixed in 5.4.0-1034.35
Upgrade
Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.
Fixed in 5.4.0-1110.117
Upgrade
Upgrade ubuntu/linux-lowlatency-hwe-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-102.112~20.04.1
Upgrade
Upgrade ubuntu/linux-nvidia-tegra-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1025.25~20.04.1
Upgrade
Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.
Fixed in 5.4.0-1121.130
Upgrade
Upgrade ubuntu/linux-oracle-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1055.61~20.04.1
Upgrade
Upgrade ubuntu/linux-raspi to a version that resolves this vulnerability.
Fixed in 5.4.0-1106.118
Upgrade
Upgrade ubuntu/linux-riscv-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1053.57~20.04.1
Upgrade
Upgrade ubuntu/linux-xilinx-zynqmp to a version that resolves this vulnerability.
Fixed in 5.4.0-1041.45
Upgrade
Upgrade ubuntu/linux-aws-fips to a version that resolves this vulnerability.
Fixed in 5.4.0-1122.132+fips1
Upgrade
Upgrade ubuntu/linux-azure-fips to a version that resolves this vulnerability.
Fixed in 5.4.0-1127.134+fips1
Upgrade
Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.
Fixed in 5.4.0-1096.106
Upgrade
Upgrade ubuntu/linux-gcp-fips to a version that resolves this vulnerability.
Fixed in 5.4.0-1126.135+fips1
Upgrade
Upgrade ubuntu/linux to a version that resolves this vulnerability.
Fixed in 5.15.0-102.112
Upgrade
Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.
Fixed in 5.15.0-1057.63
Upgrade
Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.
Fixed in 5.15.0-1060.69
Upgrade
Upgrade ubuntu/linux-azure-fde to a version that resolves this vulnerability.
Fixed in 5.15.0-1060.69.1
Upgrade
Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.
Fixed in 5.15.0-1055.63
Upgrade
Upgrade ubuntu/linux-gke to a version that resolves this vulnerability.
Fixed in 5.15.0-1054.59
Upgrade
Upgrade ubuntu/linux-gkeop to a version that resolves this vulnerability.
Fixed in 5.15.0-1040.46
Upgrade
Upgrade ubuntu/linux-ibm to a version that resolves this vulnerability.
Fixed in 5.15.0-1050.53
Upgrade
Upgrade ubuntu/linux-intel-iotg to a version that resolves this vulnerability.
Fixed in 5.15.0-1052.58
Upgrade
Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.
Fixed in 5.15.0-1054.59
Upgrade
Upgrade ubuntu/linux-lowlatency to a version that resolves this vulnerability.
Fixed in 5.15.0-102.112
Upgrade
Upgrade ubuntu/linux-nvidia to a version that resolves this vulnerability.
Fixed in 5.15.0-1048.48
Upgrade
Upgrade ubuntu/linux-nvidia-6.5 to a version that resolves this vulnerability.
Fixed in 6.5.0-1014.14
Upgrade
Upgrade ubuntu/linux-nvidia-tegra to a version that resolves this vulnerability.
Fixed in 5.15.0-1025.25
Upgrade
Upgrade ubuntu/linux-nvidia-tegra-igx to a version that resolves this vulnerability.
Fixed in 5.15.0-1012.12
Upgrade
Upgrade ubuntu/linux-oem-6.1 to a version that resolves this vulnerability.
Fixed in 6.1.0-1035.35
Upgrade
Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.
Fixed in 5.15.0-1055.61
Upgrade
Upgrade ubuntu/linux-raspi to a version that resolves this vulnerability.
Fixed in 5.15.0-1050.53
Upgrade
Upgrade ubuntu/linux-xilinx-zynqmp to a version that resolves this vulnerability.
Fixed in 5.15.0-1030.34
Upgrade
Upgrade ubuntu/linux-bluefield to a version that resolves this vulnerability.
Fixed in 5.15.0-1040.42
Upgrade
Upgrade ubuntu/linux-intel-iot-realtime to a version that resolves this vulnerability.
Fixed in 5.15.0-1050.52
Upgrade
Upgrade ubuntu/linux-realtime to a version that resolves this vulnerability.
Fixed in 5.15.0-1058.66
Upgrade
Upgrade ubuntu/linux-aws-fips to a version that resolves this vulnerability.
Fixed in 5.15.0-1057.63+fips1
Upgrade
Upgrade ubuntu/linux-azure-fips to a version that resolves this vulnerability.
Fixed in 5.15.0-1060.69+fips1
Upgrade
Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.
Fixed in 5.15.0-102.112+fips1
Upgrade
Upgrade ubuntu/linux-gcp-fips to a version that resolves this vulnerability.
Fixed in 5.15.0-1055.63+fips2
Upgrade
Upgrade ubuntu/linux-raspi-realtime to a version that resolves this vulnerability.
Fixed in 6.8.0-2001.1

Event History

Feb 20, 2024

CVE Published

via OSV·09:15 PM

Data Sourced

via OSV·09:15 PM

DescriptionSeverityAffected Software

Frequently Asked Questions

What level of access does an attacker need?

Exploitation requires local access with low privileges. No user interaction is required.

What condition triggers the flaw?

The issue depends on a race between opening a UIO device and unregistering that device. An open path can obtain a device reference after unregistration has begun, leading to use-after-free and a later double free.

What is the potential impact of successful exploitation?

The severity data rates confidentiality, integrity, and availability impact as high. The issue is classified as a use-after-free.

UBUNTU-CVE-2023-52439: Use After Free

Affected Software

Remediation

Event History

Frequently Asked Questions

What level of access does an attacker need?

What condition triggers the flaw?

What is the potential impact of successful exploitation?

Company

Resources

Contact

Frequently Asked Questions

What level of access does an attacker need?

What condition triggers the flaw?

What is the potential impact of successful exploitation?