UBUNTU-CVE-2023-52574: Null Pointer Dereference

Q: Which systems are exposed to this issue?

Systems running the affected Ubuntu Linux kernel packages listed in the advisory are exposed when they use team devices and the relevant network device configuration. The affected package set includes standard, AWS, Azure, GCP, and FIPS kernel variants.

Q: What access does an attacker need to trigger the problem?

The supplied severity vector indicates local access with low privileges and no user interaction. The reproducer uses network-management operations including creating interfaces and attaching and detaching an nlmon device from a team device.

Q: What is the practical impact of successful exploitation?

The demonstrated outcome is a kernel NULL-pointer dereference in VLAN header handling during IPv6 multicast listener processing. The availability impact is rated high, consistent with a kernel crash or denial of service.

Q: How can administrators determine whether their environment is affected?

Review whether the host runs one of the listed Ubuntu kernel variants and uses team devices whose type or membership can be changed alongside VLAN and nlmon interfaces. Kernel logs containing a NULL-pointer dereference with vlan_dev_hard_header in the call trace are an indicator that the issue has been triggered.

Published Mar 2, 2024

Updated

In the Linux kernel, the following vulnerability has been resolved: team: fix null-ptr-deref when team device type is changed Get a null-ptr-deref bug as follows with reproducer [1]. BUG: kernel NULL pointer dereference, address: 0000000000000228 ... RIP: 0010:vlandevhardheader+0x35/0x140 [8021q] ... Call Trace: <TASK> ? die+0x24/0x70 ? pagefaultoops+0x82/0x150 ? excpagefault+0x69/0x150 ? asmexcpagefault+0x26/0x30 ? vlandevhardheader+0x35/0x140 [8021q] ? vlandevhardheader+0x8e/0x140 [8021q] neighconnectedoutput+0xb2/0x100 ip6finishoutput2+0x1cb/0x520 ? nfhookslow+0x43/0xc0 ? ip6mtu+0x46/0x80 ip6finishoutput+0x2a/0xb0 mldsendpack+0x18f/0x250 mldifcwork+0x39/0x160 processonework+0x1e6/0x3f0 workerthread+0x4d/0x2f0 ? pfxworkerthread+0x10/0x10 kthread+0xe5/0x120 ? pfxkthread+0x10/0x10 retfromfork+0x34/0x50 ? pfxkthread+0x10/0x10 retfromforkasm+0x1b/0x30 [1] $ teamd -t team0 -d -c '{"runner": {"name": "loadbalance"}}' $ ip link add name t-dummy type dummy $ ip link add link t-dummy name t-dummy.100 type vlan id 100 $ ip link add name t-nlmon type nlmon $ ip link set t-nlmon master team0 $ ip link set t-nlmon nomaster $ ip link set t-dummy up $ ip link set team0 up $ ip link set t-dummy.100 down $ ip link set t-dummy.100 master team0 When enslave a vlan device to team device and team device type is changed from non-ether to ether, headerops of team device is changed to vlanheaderops. That is incorrect and will trigger null-ptr-deref for vlan->realdev in vlandevhardheader() because team device is not a vlan device. Cache ethheaderops in teamsetup(), then assign cached headerops to headerops of team net device when its type is changed from non-ether to ether to fix the bug.

Affected Software

167 affected componentsFixes available

ubuntu/linux*

ubuntu/linux-aws<4.4.0-1149.155

4.4.0-1149.155

ubuntu/linux-azure<4.15.0-1194.209~14.04.1

4.15.0-1194.209~14.04.1

ubuntu/linux-lts-xenial<4.4.0-274.308~14.04.1

4.4.0-274.308~14.04.1

ubuntu/linux<4.4.0-274.308

4.4.0-274.308

ubuntu/linux-aws<4.4.0-1187.202

4.4.0-1187.202

ubuntu/linux-aws-hwe<4.15.0-1186.199~16.04.1

4.15.0-1186.199~16.04.1

ubuntu/linux-azure<4.15.0-1194.209~16.04.1

4.15.0-1194.209~16.04.1

ubuntu/linux-gcp<4.15.0-1179.196~16.04.1

4.15.0-1179.196~16.04.1

ubuntu/linux-hwe<4.15.0-243.255~16.04.1

4.15.0-243.255~16.04.1

ubuntu/linux-kvm<4.4.0-1150.161

4.4.0-1150.161

ubuntu/linux-oracle<4.15.0-1148.159~16.04.1

4.15.0-1148.159~16.04.1

ubuntu/linux-hwe-edge*

ubuntu/linux-fips<4.4.0-1119.126

4.4.0-1119.126

ubuntu/linux-fips*

ubuntu/linux<4.15.0-243.255

4.15.0-243.255

ubuntu/linux-aws<4.15.0-1186.199

4.15.0-1186.199

ubuntu/linux-aws-5.0*

ubuntu/linux-aws-5.3*

ubuntu/linux-aws-5.4<5.4.0-1118.128~18.04.1

5.4.0-1118.128~18.04.1

ubuntu/linux-azure*

ubuntu/linux-azure-4.15<4.15.0-1194.209

4.15.0-1194.209

ubuntu/linux-azure-5.3*

ubuntu/linux-azure-5.4<5.4.0-1123.130~18.04.1

5.4.0-1123.130~18.04.1

ubuntu/linux-azure-edge*

ubuntu/linux-gcp*

ubuntu/linux-gcp-4.15<4.15.0-1179.196

4.15.0-1179.196

ubuntu/linux-gcp-5.3*

ubuntu/linux-gcp-5.4<5.4.0-1122.131~18.04.1

5.4.0-1122.131~18.04.1

ubuntu/linux-gke-4.15*

ubuntu/linux-gke-5.4*

ubuntu/linux-gkeop-5.4*

ubuntu/linux-hwe*

ubuntu/linux-hwe-5.4<5.4.0-171.189~18.04.1

5.4.0-171.189~18.04.1

ubuntu/linux-hwe-edge*

ubuntu/linux-ibm-5.4<5.4.0-1065.70~18.04.1

5.4.0-1065.70~18.04.1

ubuntu/linux-kvm<4.15.0-1168.173

4.15.0-1168.173

ubuntu/linux-oem*

ubuntu/linux-oracle<4.15.0-1148.159

4.15.0-1148.159

ubuntu/linux-oracle-5.0*

ubuntu/linux-oracle-5.3*

ubuntu/linux-oracle-5.4<5.4.0-1117.126~18.04.1

5.4.0-1117.126~18.04.1

ubuntu/linux-raspi-5.4<5.4.0-1102.114~18.04.1

5.4.0-1102.114~18.04.1

ubuntu/linux-aws-fips<4.15.0-2124.130

4.15.0-2124.130

ubuntu/linux-azure-fips<4.15.0-2104.110

4.15.0-2104.110

ubuntu/linux-fips<4.15.0-1141.153

4.15.0-1141.153

ubuntu/linux-gcp-fips<4.15.0-2087.93

4.15.0-2087.93

ubuntu/linux-aws-fips*

ubuntu/linux-azure-fips*

ubuntu/linux-fips*

ubuntu/linux-gcp-fips*

ubuntu/linux<5.4.0-171.189

5.4.0-171.189

ubuntu/linux-aws<5.4.0-1118.128

5.4.0-1118.128

ubuntu/linux-aws-5.15<5.15.0-1053.58~20.04.1

5.15.0-1053.58~20.04.1

ubuntu/linux-azure<5.4.0-1123.130

5.4.0-1123.130

ubuntu/linux-azure-5.15<5.15.0-1056.64~20.04.1

5.15.0-1056.64~20.04.1

ubuntu/linux-bluefield<5.4.0-1078.84

5.4.0-1078.84

ubuntu/linux-gcp<5.4.0-1122.131

5.4.0-1122.131

ubuntu/linux-gcp-5.15<5.15.0-1051.59~20.04.1

5.15.0-1051.59~20.04.1

ubuntu/linux-gkeop<5.4.0-1085.89

5.4.0-1085.89

ubuntu/linux-gkeop-5.15<5.15.0-1036.42~20.04.1

5.15.0-1036.42~20.04.1

ubuntu/linux-hwe-5.15<5.15.0-94.104~20.04.1

5.15.0-94.104~20.04.1

ubuntu/linux-ibm<5.4.0-1065.70

5.4.0-1065.70

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-iot<5.4.0-1030.31

5.4.0-1030.31

ubuntu/linux-kvm<5.4.0-1106.113

5.4.0-1106.113

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<5.4.0-1117.126

5.4.0-1117.126

ubuntu/linux-oracle-5.15<5.15.0-1051.57~20.04.1

5.15.0-1051.57~20.04.1

ubuntu/linux-raspi<5.4.0-1102.114

5.4.0-1102.114

ubuntu/linux-riscv-5.15<5.15.0-1049.53~20.04.2

5.15.0-1049.53~20.04.2

ubuntu/linux-xilinx-zynqmp<5.4.0-1037.41

5.4.0-1037.41

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<5.4.0-1118.128+fips1

5.4.0-1118.128+fips1

ubuntu/linux-azure-fips<5.4.0-1123.130+fips1

5.4.0-1123.130+fips1

ubuntu/linux-fips<5.4.0-1092.102

5.4.0-1092.102

ubuntu/linux-gcp-fips<5.4.0-1122.131+fips1

5.4.0-1122.131+fips1

ubuntu/linux-aws-fips*

ubuntu/linux-azure-fips*

ubuntu/linux-fips*

ubuntu/linux-gcp-fips*

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-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<6.5.0-1014.14

6.5.0-1014.14

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-starfive-5.19*

ubuntu/linux-starfive-6.2*

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-raspi-realtime*

ubuntu/linux-vmware*

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.
Fixed in 4.4.0-1149.155
Upgrade
Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.
Fixed in 4.15.0-1194.209~14.04.1
Upgrade
Upgrade ubuntu/linux-lts-xenial to a version that resolves this vulnerability.
Fixed in 4.4.0-274.308~14.04.1
Upgrade
Upgrade ubuntu/linux to a version that resolves this vulnerability.
Fixed in 4.4.0-274.308
Upgrade
Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.
Fixed in 4.4.0-1187.202
Upgrade
Upgrade ubuntu/linux-aws-hwe to a version that resolves this vulnerability.
Fixed in 4.15.0-1186.199~16.04.1
Upgrade
Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.
Fixed in 4.15.0-1194.209~16.04.1
Upgrade
Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.
Fixed in 4.15.0-1179.196~16.04.1
Upgrade
Upgrade ubuntu/linux-hwe to a version that resolves this vulnerability.
Fixed in 4.15.0-243.255~16.04.1
Upgrade
Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.
Fixed in 4.4.0-1150.161
Upgrade
Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.
Fixed in 4.15.0-1148.159~16.04.1
Upgrade
Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.
Fixed in 4.4.0-1119.126
Upgrade
Upgrade ubuntu/linux to a version that resolves this vulnerability.
Fixed in 4.15.0-243.255
Upgrade
Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.
Fixed in 4.15.0-1186.199
Upgrade
Upgrade ubuntu/linux-aws-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1118.128~18.04.1
Upgrade
Upgrade ubuntu/linux-azure-4.15 to a version that resolves this vulnerability.
Fixed in 4.15.0-1194.209
Upgrade
Upgrade ubuntu/linux-azure-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1123.130~18.04.1
Upgrade
Upgrade ubuntu/linux-gcp-4.15 to a version that resolves this vulnerability.
Fixed in 4.15.0-1179.196
Upgrade
Upgrade ubuntu/linux-gcp-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1122.131~18.04.1
Upgrade
Upgrade ubuntu/linux-hwe-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-171.189~18.04.1
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Upgrade ubuntu/linux-ibm-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1065.70~18.04.1
Upgrade
Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.
Fixed in 4.15.0-1168.173
Upgrade
Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.
Fixed in 4.15.0-1148.159
Upgrade
Upgrade ubuntu/linux-oracle-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1117.126~18.04.1
Upgrade
Upgrade ubuntu/linux-raspi-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1102.114~18.04.1
Upgrade
Upgrade ubuntu/linux-aws-fips to a version that resolves this vulnerability.
Fixed in 4.15.0-2124.130
Upgrade
Upgrade ubuntu/linux-azure-fips to a version that resolves this vulnerability.
Fixed in 4.15.0-2104.110
Upgrade
Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.
Fixed in 4.15.0-1141.153
Upgrade
Upgrade ubuntu/linux-gcp-fips to a version that resolves this vulnerability.
Fixed in 4.15.0-2087.93
Upgrade
Upgrade ubuntu/linux to a version that resolves this vulnerability.
Fixed in 5.4.0-171.189
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Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.
Fixed in 5.4.0-1118.128
Upgrade
Upgrade ubuntu/linux-aws-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1053.58~20.04.1
Upgrade
Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.
Fixed in 5.4.0-1123.130
Upgrade
Upgrade ubuntu/linux-azure-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1056.64~20.04.1
Upgrade
Upgrade ubuntu/linux-bluefield to a version that resolves this vulnerability.
Fixed in 5.4.0-1078.84
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Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.
Fixed in 5.4.0-1122.131
Upgrade
Upgrade ubuntu/linux-gcp-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1051.59~20.04.1
Upgrade
Upgrade ubuntu/linux-gkeop to a version that resolves this vulnerability.
Fixed in 5.4.0-1085.89
Upgrade
Upgrade ubuntu/linux-gkeop-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1036.42~20.04.1
Upgrade
Upgrade ubuntu/linux-hwe-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-94.104~20.04.1
Upgrade
Upgrade ubuntu/linux-ibm to a version that resolves this vulnerability.
Fixed in 5.4.0-1065.70
Upgrade
Upgrade ubuntu/linux-ibm-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1046.49~20.04.1
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
Upgrade
Upgrade ubuntu/linux-iot to a version that resolves this vulnerability.
Fixed in 5.4.0-1030.31
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Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.
Fixed in 5.4.0-1106.113
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
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Upgrade ubuntu/linux-nvidia-tegra-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1022.22~20.04.1
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Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.
Fixed in 5.4.0-1117.126
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Upgrade ubuntu/linux-oracle-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1051.57~20.04.1
Upgrade
Upgrade ubuntu/linux-raspi to a version that resolves this vulnerability.
Fixed in 5.4.0-1102.114
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Upgrade ubuntu/linux-riscv-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1049.53~20.04.2
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Upgrade ubuntu/linux-xilinx-zynqmp to a version that resolves this vulnerability.
Fixed in 5.4.0-1037.41
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Upgrade ubuntu/linux-aws-fips to a version that resolves this vulnerability.
Fixed in 5.4.0-1118.128+fips1
Upgrade
Upgrade ubuntu/linux-azure-fips to a version that resolves this vulnerability.
Fixed in 5.4.0-1123.130+fips1
Upgrade
Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.
Fixed in 5.4.0-1092.102
Upgrade
Upgrade ubuntu/linux-gcp-fips to a version that resolves this vulnerability.
Fixed in 5.4.0-1122.131+fips1
Upgrade
Upgrade ubuntu/linux to a version that resolves this vulnerability.
Fixed in 5.15.0-94.104
Upgrade
Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.
Fixed in 5.15.0-1053.58
Upgrade
Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.
Fixed in 5.15.0-1056.64
Upgrade
Upgrade ubuntu/linux-azure-fde to a version that resolves this vulnerability.
Fixed in 5.15.0-1056.64.1
Upgrade
Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.
Fixed in 5.15.0-1051.59
Upgrade
Upgrade ubuntu/linux-gke to a version that resolves this vulnerability.
Fixed in 5.15.0-1050.55
Upgrade
Upgrade ubuntu/linux-gkeop to a version that resolves this vulnerability.
Fixed in 5.15.0-1036.42
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Upgrade ubuntu/linux-ibm to a version that resolves this vulnerability.
Fixed in 5.15.0-1046.49
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Upgrade ubuntu/linux-intel-iotg to a version that resolves this vulnerability.
Fixed in 5.15.0-1047.53
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Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.
Fixed in 5.15.0-1050.55
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Upgrade ubuntu/linux-lowlatency to a version that resolves this vulnerability.
Fixed in 5.15.0-94.104
Upgrade
Upgrade ubuntu/linux-nvidia to a version that resolves this vulnerability.
Fixed in 5.15.0-1044.44
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 5.15.0-1022.22
Upgrade
Upgrade ubuntu/linux-nvidia-tegra-igx to a version that resolves this vulnerability.
Fixed in 5.15.0-1009.9
Upgrade
Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.
Fixed in 5.15.0-1051.57
Upgrade
Upgrade ubuntu/linux-raspi to a version that resolves this vulnerability.
Fixed in 5.15.0-1046.49
Upgrade
Upgrade ubuntu/linux-xilinx-zynqmp to a version that resolves this vulnerability.
Fixed in 5.15.0-1027.31
Upgrade
Upgrade ubuntu/linux-bluefield to a version that resolves this vulnerability.
Fixed in 5.15.0-1035.37
Upgrade
Upgrade ubuntu/linux-intel-iot-realtime to a version that resolves this vulnerability.
Fixed in 5.15.0-1046.48
Upgrade
Upgrade ubuntu/linux-realtime to a version that resolves this vulnerability.
Fixed in 5.15.0-1054.60
Upgrade
Upgrade ubuntu/linux-aws-fips to a version that resolves this vulnerability.
Fixed in 5.15.0-1053.58+fips1
Upgrade
Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.
Fixed in 5.15.0-94.104+fips1
Upgrade
Upgrade ubuntu/linux-gcp-fips to a version that resolves this vulnerability.
Fixed in 5.15.0-1055.63+fips2

Event History

Mar 2, 2024

CVE Published

via OSV·10:15 PM

Data Sourced

via OSV·10:15 PM

DescriptionSeverityAffected Software

Frequently Asked Questions

Which systems are exposed to this issue?

Systems running the affected Ubuntu Linux kernel packages listed in the advisory are exposed when they use team devices and the relevant network device configuration. The affected package set includes standard, AWS, Azure, GCP, and FIPS kernel variants.

What access does an attacker need to trigger the problem?

The supplied severity vector indicates local access with low privileges and no user interaction. The reproducer uses network-management operations including creating interfaces and attaching and detaching an nlmon device from a team device.

What is the practical impact of successful exploitation?

The demonstrated outcome is a kernel NULL-pointer dereference in VLAN header handling during IPv6 multicast listener processing. The availability impact is rated high, consistent with a kernel crash or denial of service.

How can administrators determine whether their environment is affected?

Review whether the host runs one of the listed Ubuntu kernel variants and uses team devices whose type or membership can be changed alongside VLAN and nlmon interfaces. Kernel logs containing a NULL-pointer dereference with vlan_dev_hard_header in the call trace are an indicator that the issue has been triggered.

UBUNTU-CVE-2023-52574: Null Pointer Dereference

Affected Software

Remediation

Event History

Frequently Asked Questions

Which systems are exposed to this issue?

What access does an attacker need to trigger the problem?

What is the practical impact of successful exploitation?

How can administrators determine whether their environment is affected?

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Resources

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Frequently Asked Questions

Which systems are exposed to this issue?

What access does an attacker need to trigger the problem?

What is the practical impact of successful exploitation?

How can administrators determine whether their environment is affected?