UBUNTU-CVE-2024-46800: Use After Free

Q: What access would an attacker need to trigger this issue?

The supplied trigger uses local network-administration commands to create interfaces, configure traffic-control qdiscs and filters, and modify classes. The severity vector also indicates local access and low privileges are required, with no user interaction.

Q: Which Ubuntu kernel packages are identified as affected?

The listed software includes ubuntu/linux, ubuntu/linux-aws, ubuntu/linux-azure, ubuntu/linux-gcp, and their listed FIPS variants: ubuntu/linux-fips, ubuntu/linux-aws-fips, ubuntu/linux-azure-fips, and ubuntu/linux-gcp-fips.

Q: How can an administrator determine whether the vulnerable path is reachable?

The issue is associated with a netem qdisc nested under DRR qdiscs, with a filter that redirects traffic to another interface. The provided reproduction triggers the fault by deleting and re-adding a DRR class while traffic is sent through that configuration; KASAN reports the use-after-free.

Q: What can be done if patching cannot happen immediately?

Avoid or restrict untrusted local users' ability to administer traffic-control configuration, particularly creation or modification of netem and DRR qdisc hierarchies and redirect filters. The provided trigger depends on constructing and changing that specific traffic-control setup.

Published Sep 18, 2024

Updated

In the Linux kernel, the following vulnerability has been resolved: sch/netem: fix use after free in netemdequeue If netemdequeue() enqueues packet to inner qdisc and that qdisc returns NETXMITSTOLEN. The packet is dropped but qdisctreereducebacklog() is not called to update the parent's q.qlen, leading to the similar use-after-free as Commit e04991a48dbaf382 ("netem: fix return value if duplicate enqueue fails") Commands to trigger KASAN UaF: ip link add type dummy ip link set lo up ip link set dummy0 up tc qdisc add dev lo parent root handle 1: drr tc filter add dev lo parent 1: basic classid 1:1 tc class add dev lo classid 1:1 drr tc qdisc add dev lo parent 1:1 handle 2: netem tc qdisc add dev lo parent 2: handle 3: drr tc filter add dev lo parent 3: basic classid 3:1 action mirred egress redirect dev dummy0 tc class add dev lo classid 3:1 drr ping -c1 -W0.01 localhost # Trigger bug tc class del dev lo classid 1:1 tc class add dev lo classid 1:1 drr ping -c1 -W0.01 localhost # UaF

Affected Software

196 affected componentsFixes available

ubuntu/linux-aws<4.4.0-1138.144

4.4.0-1138.144

ubuntu/linux-azure<4.15.0-1183.198~14.04.1

4.15.0-1183.198~14.04.1

ubuntu/linux-lts-xenial<4.4.0-261.295~14.04.1

4.4.0-261.295~14.04.1

ubuntu/linux*

ubuntu/linux<4.4.0-261.295

4.4.0-261.295

ubuntu/linux-aws<4.4.0-1176.191

4.4.0-1176.191

ubuntu/linux-aws-hwe<4.15.0-1175.188~16.04.1

4.15.0-1175.188~16.04.1

ubuntu/linux-azure<4.15.0-1183.198~16.04.1

4.15.0-1183.198~16.04.1

ubuntu/linux-gcp<4.15.0-1168.185~16.04.1

4.15.0-1168.185~16.04.1

ubuntu/linux-hwe<4.15.0-231.243~16.04.1

4.15.0-231.243~16.04.1

ubuntu/linux-kvm<4.4.0-1139.149

4.4.0-1139.149

ubuntu/linux-oracle<4.15.0-1137.148~16.04.1

4.15.0-1137.148~16.04.1

ubuntu/linux-hwe-edge*

ubuntu/linux-fips<4.4.0-1107.114

4.4.0-1107.114

ubuntu/linux-fips*

ubuntu/linux<4.15.0-231.243

4.15.0-231.243

ubuntu/linux-aws<4.15.0-1175.188

4.15.0-1175.188

ubuntu/linux-aws-5.0*

ubuntu/linux-aws-5.3*

ubuntu/linux-aws-5.4<5.4.0-1135.145~18.04.1

5.4.0-1135.145~18.04.1

ubuntu/linux-azure*

ubuntu/linux-azure-4.15<4.15.0-1183.198

4.15.0-1183.198

ubuntu/linux-azure-5.3*

ubuntu/linux-azure-5.4<5.4.0-1140.147~18.04.1

5.4.0-1140.147~18.04.1

ubuntu/linux-azure-edge*

ubuntu/linux-gcp*

ubuntu/linux-gcp-4.15<4.15.0-1168.185

4.15.0-1168.185

ubuntu/linux-gcp-5.3*

ubuntu/linux-gcp-5.4<5.4.0-1139.148~18.04.1

5.4.0-1139.148~18.04.1

ubuntu/linux-gke-4.15*

ubuntu/linux-gke-5.4*

ubuntu/linux-gkeop-5.4*

ubuntu/linux-hwe*

ubuntu/linux-hwe-5.4<5.4.0-200.220~18.04.1

5.4.0-200.220~18.04.1

ubuntu/linux-hwe-edge*

ubuntu/linux-ibm-5.4<5.4.0-1082.87~18.04.1

5.4.0-1082.87~18.04.1

ubuntu/linux-kvm<4.15.0-1158.163

4.15.0-1158.163

ubuntu/linux-oem*

ubuntu/linux-oracle<4.15.0-1137.148

4.15.0-1137.148

ubuntu/linux-oracle-5.0*

ubuntu/linux-oracle-5.3*

ubuntu/linux-oracle-5.4<5.4.0-1134.143~18.04.1

5.4.0-1134.143~18.04.1

ubuntu/linux-raspi-5.4<5.4.0-1119.131~18.04.1

5.4.0-1119.131~18.04.1

ubuntu/linux-aws-fips<4.15.0-2113.119

4.15.0-2113.119

ubuntu/linux-azure-fips<4.15.0-2092.98

4.15.0-2092.98

ubuntu/linux-fips<4.15.0-1129.140

4.15.0-1129.140

ubuntu/linux-gcp-fips<4.15.0-2076.81

4.15.0-2076.81

ubuntu/linux-aws-fips*

ubuntu/linux-azure-fips*

ubuntu/linux-fips*

ubuntu/linux-gcp-fips*

ubuntu/linux<5.4.0-200.220

5.4.0-200.220

ubuntu/linux-aws<5.4.0-1135.145

5.4.0-1135.145

ubuntu/linux-aws-5.15<5.15.0-1072.78~20.04.1

5.15.0-1072.78~20.04.1

ubuntu/linux-azure<5.4.0-1140.147

5.4.0-1140.147

ubuntu/linux-azure-5.15<5.15.0-1078.87~20.04.1

5.15.0-1078.87~20.04.1

ubuntu/linux-bluefield<5.4.0-1095.102

5.4.0-1095.102

ubuntu/linux-gcp<5.4.0-1139.148

5.4.0-1139.148

ubuntu/linux-gcp-5.15<5.15.0-1071.79~20.04.1

5.15.0-1071.79~20.04.1

ubuntu/linux-gkeop<5.4.0-1102.106

5.4.0-1102.106

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<5.4.0-1082.87

5.4.0-1082.87

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-iot<5.4.0-1044.45

5.4.0-1044.45

ubuntu/linux-kvm<5.4.0-1123.131

5.4.0-1123.131

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<5.4.0-1134.143

5.4.0-1134.143

ubuntu/linux-oracle-5.15<5.15.0-1070.76~20.04.1

5.15.0-1070.76~20.04.1

ubuntu/linux-raspi<5.4.0-1119.131

5.4.0-1119.131

ubuntu/linux-riscv-5.15<5.15.0-1068.72~20.04.1

5.15.0-1068.72~20.04.1

ubuntu/linux-xilinx-zynqmp<5.4.0-1054.58

5.4.0-1054.58

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<5.4.0-1135.145+fips1

5.4.0-1135.145+fips1

ubuntu/linux-azure-fips<5.4.0-1140.147+fips1

5.4.0-1140.147+fips1

ubuntu/linux-fips<5.4.0-1109.119

5.4.0-1109.119

ubuntu/linux-gcp-fips<5.4.0-1139.148+fips1

5.4.0-1139.148+fips1

ubuntu/linux-aws-fips*

ubuntu/linux-azure-fips*

ubuntu/linux-fips*

ubuntu/linux-gcp-fips*

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<6.8.0-1019.21~22.04.1

6.8.0-1019.21~22.04.1

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<6.8.0-1018.21~22.04.1

6.8.0-1018.21~22.04.1

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<6.8.0-1018.20~22.04.1

6.8.0-1018.20~22.04.1

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<6.8.0-49.49~22.04.1

6.8.0-49.49~22.04.1

ubuntu/linux-ibm<5.15.0-1065.68

5.15.0-1065.68

ubuntu/linux-ibm-6.8<6.8.0-1016.16~22.04.1

6.8.0-1016.16~22.04.1

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<6.8.0-49.49.1~22.04.1

6.8.0-49.49.1~22.04.1

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<6.8.0-1018.20~22.04.1

6.8.0-1018.20~22.04.1

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<6.8.0-1016.17~22.04.1

6.8.0-1016.17~22.04.1

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<6.8.0-49.49.1~22.04.1

6.8.0-49.49.1~22.04.1

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<6.8.1-1012.12~22.04.1

6.8.1-1012.12~22.04.1

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<6.8.0-49.49

6.8.0-49.49

ubuntu/linux-aws<6.8.0-1019.21

6.8.0-1019.21

ubuntu/linux-azure<6.8.0-1018.21

6.8.0-1018.21

ubuntu/linux-gcp<6.8.0-1018.20

6.8.0-1018.20

ubuntu/linux-gke<6.8.0-1014.18

6.8.0-1014.18

ubuntu/linux-gkeop<6.8.0-1002.4

6.8.0-1002.4

ubuntu/linux-ibm<6.8.0-1016.16

6.8.0-1016.16

ubuntu/linux-lowlatency<6.8.0-49.49.1

6.8.0-49.49.1

ubuntu/linux-nvidia<6.8.0-1018.20

6.8.0-1018.20

ubuntu/linux-nvidia-lowlatency<6.8.0-1018.20.1

6.8.0-1018.20.1

ubuntu/linux-oem-6.8<6.8.0-1017.17

6.8.0-1017.17

ubuntu/linux-oracle<6.8.0-1016.17

6.8.0-1016.17

ubuntu/linux-raspi<6.8.0-1015.17

6.8.0-1015.17

ubuntu/linux-riscv<6.8.0-49.49.1

6.8.0-49.49.1

ubuntu/linux-xilinx<6.8.0-1017.18

6.8.0-1017.18

ubuntu/linux-raspi-realtime<6.8.0-2014.15

6.8.0-2014.15

ubuntu/linux-realtime<6.8.1-1012.12

6.8.1-1012.12

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 to a version that resolves this vulnerability.
Fixed in 4.4.0-1138.144
Upgrade
Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.
Fixed in 4.15.0-1183.198~14.04.1
Upgrade
Upgrade ubuntu/linux-lts-xenial to a version that resolves this vulnerability.
Fixed in 4.4.0-261.295~14.04.1
Upgrade
Upgrade ubuntu/linux to a version that resolves this vulnerability.
Fixed in 4.4.0-261.295
Upgrade
Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.
Fixed in 4.4.0-1176.191
Upgrade
Upgrade ubuntu/linux-aws-hwe to a version that resolves this vulnerability.
Fixed in 4.15.0-1175.188~16.04.1
Upgrade
Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.
Fixed in 4.15.0-1183.198~16.04.1
Upgrade
Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.
Fixed in 4.15.0-1168.185~16.04.1
Upgrade
Upgrade ubuntu/linux-hwe to a version that resolves this vulnerability.
Fixed in 4.15.0-231.243~16.04.1
Upgrade
Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.
Fixed in 4.4.0-1139.149
Upgrade
Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.
Fixed in 4.15.0-1137.148~16.04.1
Upgrade
Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.
Fixed in 4.4.0-1107.114
Upgrade
Upgrade ubuntu/linux to a version that resolves this vulnerability.
Fixed in 4.15.0-231.243
Upgrade
Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.
Fixed in 4.15.0-1175.188
Upgrade
Upgrade ubuntu/linux-aws-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1135.145~18.04.1
Upgrade
Upgrade ubuntu/linux-azure-4.15 to a version that resolves this vulnerability.
Fixed in 4.15.0-1183.198
Upgrade
Upgrade ubuntu/linux-azure-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1140.147~18.04.1
Upgrade
Upgrade ubuntu/linux-gcp-4.15 to a version that resolves this vulnerability.
Fixed in 4.15.0-1168.185
Upgrade
Upgrade ubuntu/linux-gcp-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1139.148~18.04.1
Upgrade
Upgrade ubuntu/linux-hwe-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-200.220~18.04.1
Upgrade
Upgrade ubuntu/linux-ibm-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1082.87~18.04.1
Upgrade
Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.
Fixed in 4.15.0-1158.163
Upgrade
Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.
Fixed in 4.15.0-1137.148
Upgrade
Upgrade ubuntu/linux-oracle-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1134.143~18.04.1
Upgrade
Upgrade ubuntu/linux-raspi-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1119.131~18.04.1
Upgrade
Upgrade ubuntu/linux-aws-fips to a version that resolves this vulnerability.
Fixed in 4.15.0-2113.119
Upgrade
Upgrade ubuntu/linux-azure-fips to a version that resolves this vulnerability.
Fixed in 4.15.0-2092.98
Upgrade
Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.
Fixed in 4.15.0-1129.140
Upgrade
Upgrade ubuntu/linux-gcp-fips to a version that resolves this vulnerability.
Fixed in 4.15.0-2076.81
Upgrade
Upgrade ubuntu/linux to a version that resolves this vulnerability.
Fixed in 5.4.0-200.220
Upgrade
Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.
Fixed in 5.4.0-1135.145
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 to a version that resolves this vulnerability.
Fixed in 5.4.0-1140.147
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-bluefield to a version that resolves this vulnerability.
Fixed in 5.4.0-1095.102
Upgrade
Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.
Fixed in 5.4.0-1139.148
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 to a version that resolves this vulnerability.
Fixed in 5.4.0-1102.106
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 to a version that resolves this vulnerability.
Fixed in 5.4.0-1082.87
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-iot to a version that resolves this vulnerability.
Fixed in 5.4.0-1044.45
Upgrade
Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.
Fixed in 5.4.0-1123.131
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 to a version that resolves this vulnerability.
Fixed in 5.4.0-1134.143
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-raspi to a version that resolves this vulnerability.
Fixed in 5.4.0-1119.131
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-xilinx-zynqmp to a version that resolves this vulnerability.
Fixed in 5.4.0-1054.58
Upgrade
Upgrade ubuntu/linux-aws-fips to a version that resolves this vulnerability.
Fixed in 5.4.0-1135.145+fips1
Upgrade
Upgrade ubuntu/linux-azure-fips to a version that resolves this vulnerability.
Fixed in 5.4.0-1140.147+fips1
Upgrade
Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.
Fixed in 5.4.0-1109.119
Upgrade
Upgrade ubuntu/linux-gcp-fips to a version that resolves this vulnerability.
Fixed in 5.4.0-1139.148+fips1
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 6.8.0-1019.21~22.04.1
Upgrade
Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.
Fixed in 5.15.0-1075.84
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Fixed in 6.8.0-1018.21~22.04.1
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Fixed in 5.15.0-1076.85.1
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Fixed in 5.15.0-1071.79
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Fixed in 6.8.0-1018.20~22.04.1
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Fixed in 5.15.0-1069.75
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Fixed in 5.15.0-1055.62
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Fixed in 6.8.0-49.49~22.04.1
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Fixed in 5.15.0-1065.68
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Fixed in 6.8.0-1016.16~22.04.1
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Fixed in 5.15.0-1067.73
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Fixed in 5.15.0-1069.74
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Fixed in 5.15.0-125.135
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Fixed in 6.8.0-49.49.1~22.04.1
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Fixed in 5.15.0-1067.68
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Fixed in 6.8.0-1018.20~22.04.1
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Fixed in 5.15.0-1032.32
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Fixed in 5.15.0-1020.20
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Fixed in 5.15.0-1070.76
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Fixed in 6.8.0-1016.17~22.04.1
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Fixed in 5.15.0-1065.68
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Fixed in 6.8.0-49.49.1~22.04.1
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Fixed in 5.15.0-1038.42
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Fixed in 5.15.0-1056.58
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Fixed in 5.15.0-1066.68
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Fixed in 5.15.0-1073.81
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Fixed in 6.8.1-1012.12~22.04.1
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Fixed in 5.15.0-1072.78+fips1
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Fixed in 5.15.0-1075.84+fips1
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Fixed in 5.15.0-125.135+fips1
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Fixed in 5.15.0-1071.79+fips1
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Fixed in 6.8.0-49.49
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Fixed in 6.8.0-1019.21
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Fixed in 6.8.0-1018.21
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Fixed in 6.8.0-1018.20
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Fixed in 6.8.0-1014.18
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Fixed in 6.8.0-1002.4
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Fixed in 6.8.0-1016.16
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Fixed in 6.8.0-49.49.1
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Fixed in 6.8.0-1018.20
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Fixed in 6.8.0-1018.20.1
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Fixed in 6.8.0-1017.17
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Fixed in 6.8.0-1016.17
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Fixed in 6.8.0-1015.17
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Fixed in 6.8.0-49.49.1
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Fixed in 6.8.0-1017.18
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Fixed in 6.8.0-2014.15
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Fixed in 6.8.1-1012.12
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Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.
Fixed in 6.8.0-78.78+fips1

Event History

Sep 18, 2024

CVE Published

via OSV·08:15 AM

Data Sourced

via OSV·08:15 AM

DescriptionSeverityAffected Software

Frequently Asked Questions

What access would an attacker need to trigger this issue?

The supplied trigger uses local network-administration commands to create interfaces, configure traffic-control qdiscs and filters, and modify classes. The severity vector also indicates local access and low privileges are required, with no user interaction.

Which Ubuntu kernel packages are identified as affected?

The listed software includes ubuntu/linux, ubuntu/linux-aws, ubuntu/linux-azure, ubuntu/linux-gcp, and their listed FIPS variants: ubuntu/linux-fips, ubuntu/linux-aws-fips, ubuntu/linux-azure-fips, and ubuntu/linux-gcp-fips.

How can an administrator determine whether the vulnerable path is reachable?

The issue is associated with a netem qdisc nested under DRR qdiscs, with a filter that redirects traffic to another interface. The provided reproduction triggers the fault by deleting and re-adding a DRR class while traffic is sent through that configuration; KASAN reports the use-after-free.

What can be done if patching cannot happen immediately?

Avoid or restrict untrusted local users' ability to administer traffic-control configuration, particularly creation or modification of netem and DRR qdisc hierarchies and redirect filters. The provided trigger depends on constructing and changing that specific traffic-control setup.

UBUNTU-CVE-2024-46800: Use After Free

Affected Software

Remediation

Event History

Frequently Asked Questions

What access would an attacker need to trigger this issue?

Which Ubuntu kernel packages are identified as affected?

How can an administrator determine whether the vulnerable path is reachable?

What can be done if patching cannot happen immediately?

Company

Resources

Contact

Frequently Asked Questions

What access would an attacker need to trigger this issue?

Which Ubuntu kernel packages are identified as affected?

How can an administrator determine whether the vulnerable path is reachable?

What can be done if patching cannot happen immediately?