UBUNTU-CVE-2024-58093: Use After Free

Q: Which systems are most likely to encounter this issue?

Systems using an affected Ubuntu kernel and PCIe switches whose upstream port exposes multiple functions are the relevant environment. The failure is especially frequent during PCIe hot-unplug operations, where pciehp removes devices in reverse order.

Q: What condition triggers the use-after-free?

The issue occurs when functions other than function 0 are removed first on a PCIe switch with a multi-function-device upstream port. That can free an ASPM parent link while it is still referenced by remaining downstream ports, leading to general protection faults.

Q: Is physical access required to exploit or trigger the issue?

The supplied severity vector lists local attack vector and low privileges, with no user interaction required. The description specifically identifies device-function removal and hot-unplug as triggering conditions.

Published Apr 16, 2025

Updated

In the Linux kernel, the following vulnerability has been resolved: PCI/ASPM: Fix link state exit during switch upstream function removal Before 456d8aa37d0f ("PCI/ASPM: Disable ASPM on MFD function removal to avoid use-after-free"), we would free the ASPM link only after the last function on the bus pertaining to the given link was removed. That was too late. If function 0 is removed before sibling function, link->downstream would point to free'd memory after. After above change, we freed the ASPM parent link state upon any function removal on the bus pertaining to a given link. That is too early. If the link is to a PCIe switch with MFD on the upstream port, then removing functions other than 0 first would free a link which still remains parentlink to the remaining downstream ports. The resulting GPFs are especially frequent during hot-unplug, because pciehp removes devices on the link bus in reverse order. On that switch, function 0 is the virtual P2P bridge to the internal bus. Free exactly when function 0 is removed -- before the parent link is obsolete, but after all subordinate links are gone. [kwilczynski: commit log]

Affected Software

177 affected componentsFixes available

ubuntu/linux-hwe-edge*

ubuntu/linux-aws-5.0*

ubuntu/linux-aws-5.3*

ubuntu/linux-aws-5.4<5.4.0-1147.157~18.04.1

5.4.0-1147.157~18.04.1

ubuntu/linux-azure*

ubuntu/linux-azure-5.3*

ubuntu/linux-azure-5.4<5.4.0-1152.159~18.04.1

5.4.0-1152.159~18.04.1

ubuntu/linux-azure-edge*

ubuntu/linux-gcp*

ubuntu/linux-gcp-5.3*

ubuntu/linux-gcp-5.4<5.4.0-1150.159~18.04.1

5.4.0-1150.159~18.04.1

ubuntu/linux-gke-4.15*

ubuntu/linux-gke-5.4*

ubuntu/linux-gkeop-5.4*

ubuntu/linux-hwe*

ubuntu/linux-hwe-5.4<5.4.0-218.238~18.04.1

5.4.0-218.238~18.04.1

ubuntu/linux-hwe-edge*

ubuntu/linux-ibm-5.4<5.4.0-1093.98~18.04.1

5.4.0-1093.98~18.04.1

ubuntu/linux-oem*

ubuntu/linux-oracle-5.0*

ubuntu/linux-oracle-5.3*

ubuntu/linux-oracle-5.4<5.4.0-1145.155~18.04.1

5.4.0-1145.155~18.04.1

ubuntu/linux-raspi-5.4<5.4.0-1130.143~18.04.1

5.4.0-1130.143~18.04.1

ubuntu/linux<5.4.0-218.238

5.4.0-218.238

ubuntu/linux-aws<5.4.0-1147.157

5.4.0-1147.157

ubuntu/linux-aws-5.11*

ubuntu/linux-aws-5.13*

ubuntu/linux-aws-5.15<5.15.0-1086.93~20.04.1

5.15.0-1086.93~20.04.1

ubuntu/linux-aws-5.8*

ubuntu/linux-azure<5.4.0-1152.159

5.4.0-1152.159

ubuntu/linux-azure-5.11*

ubuntu/linux-azure-5.13*

ubuntu/linux-azure-5.15<5.15.0-1091.100~20.04.1

5.15.0-1091.100~20.04.1

ubuntu/linux-azure-5.8*

ubuntu/linux-azure-fde*

ubuntu/linux-bluefield<5.4.0-1106.113

5.4.0-1106.113

ubuntu/linux-gcp<5.4.0-1150.159

5.4.0-1150.159

ubuntu/linux-gcp-5.11*

ubuntu/linux-gcp-5.13*

ubuntu/linux-gcp-5.15<5.15.0-1085.94~20.04.1

5.15.0-1085.94~20.04.1

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<5.15.0-142.152~20.04.1

5.15.0-142.152~20.04.1

ubuntu/linux-hwe-5.8*

ubuntu/linux-ibm<5.4.0-1093.98

5.4.0-1093.98

ubuntu/linux-ibm-5.15<5.15.0-1078.81~20.04.1

5.15.0-1078.81~20.04.1

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-iot<5.4.0-1051.54

5.4.0-1051.54

ubuntu/linux-kvm<5.4.0-1134.143

5.4.0-1134.143

ubuntu/linux-lowlatency-hwe-5.15<5.15.0-142.152~20.04.1

5.15.0-142.152~20.04.1

ubuntu/linux-nvidia-tegra-5.15<5.15.0-1039.39~20.04.1

5.15.0-1039.39~20.04.1

ubuntu/linux-oem-5.10*

ubuntu/linux-oem-5.13*

ubuntu/linux-oem-5.6*

ubuntu/linux-oracle<5.4.0-1145.155

5.4.0-1145.155

ubuntu/linux-oracle-5.11*

ubuntu/linux-oracle-5.13*

ubuntu/linux-oracle-5.15<5.15.0-1083.89~20.04.1

5.15.0-1083.89~20.04.1

ubuntu/linux-oracle-5.8*

ubuntu/linux-raspi<5.4.0-1130.143

5.4.0-1130.143

ubuntu/linux-raspi2*

ubuntu/linux-riscv*

ubuntu/linux-riscv-5.11*

ubuntu/linux-riscv-5.15<5.15.0-1081.85~20.04.1

5.15.0-1081.85~20.04.1

ubuntu/linux-riscv-5.8*

ubuntu/linux-xilinx-zynqmp<5.4.0-1065.69

5.4.0-1065.69

ubuntu/linux-aws-fips<5.4.0-1147.157+fips1

5.4.0-1147.157+fips1

ubuntu/linux-azure-fips<5.4.0-1153.160+fips1

5.4.0-1153.160+fips1

ubuntu/linux-fips<5.4.0-1121.131

5.4.0-1121.131

ubuntu/linux-gcp-fips<5.4.0-1150.159+fips1

5.4.0-1150.159+fips1

ubuntu/linux<5.15.0-142.152

5.15.0-142.152

ubuntu/linux-allwinner-5.19*

ubuntu/linux-aws<5.15.0-1086.93

5.15.0-1086.93

ubuntu/linux-aws-5.19*

ubuntu/linux-aws-6.2*

ubuntu/linux-aws-6.5*

ubuntu/linux-aws-6.8<6.8.0-1035.37~22.04.1

6.8.0-1035.37~22.04.1

ubuntu/linux-azure<5.15.0-1091.100

5.15.0-1091.100

ubuntu/linux-azure-5.19*

ubuntu/linux-azure-6.2*

ubuntu/linux-azure-6.5*

ubuntu/linux-azure-6.8<6.8.0-1034.39~22.04.1

6.8.0-1034.39~22.04.1

ubuntu/linux-azure-fde<5.15.0-1091.100.1

5.15.0-1091.100.1

ubuntu/linux-azure-fde-5.19*

ubuntu/linux-azure-fde-6.2*

ubuntu/linux-gcp<5.15.0-1085.94

5.15.0-1085.94

ubuntu/linux-gcp-5.19*

ubuntu/linux-gcp-6.2*

ubuntu/linux-gcp-6.5*

ubuntu/linux-gcp-6.8<6.8.0-1036.38~22.04.1

6.8.0-1036.38~22.04.1

ubuntu/linux-gke<5.15.0-1083.89

5.15.0-1083.89

ubuntu/linux-gkeop<5.15.0-1068.76

5.15.0-1068.76

ubuntu/linux-hwe-5.19*

ubuntu/linux-hwe-6.2*

ubuntu/linux-hwe-6.5*

ubuntu/linux-hwe-6.8<6.8.0-78.78~22.04.1

6.8.0-78.78~22.04.1

ubuntu/linux-ibm<5.15.0-1078.81

5.15.0-1078.81

ubuntu/linux-ibm-6.8<6.8.0-1033.33~22.04.1

6.8.0-1033.33~22.04.1

ubuntu/linux-intel-iot-realtime*

ubuntu/linux-intel-iotg<5.15.0-1081.87

5.15.0-1081.87

ubuntu/linux-kvm<5.15.0-1082.87

5.15.0-1082.87

ubuntu/linux-lowlatency<5.15.0-142.152

5.15.0-142.152

ubuntu/linux-lowlatency-hwe-5.19*

ubuntu/linux-lowlatency-hwe-6.2*

ubuntu/linux-lowlatency-hwe-6.5*

ubuntu/linux-lowlatency-hwe-6.8<6.8.0-78.78.1~22.04.1

6.8.0-78.78.1~22.04.1

ubuntu/linux-nvidia<5.15.0-1080.81

5.15.0-1080.81

ubuntu/linux-nvidia-6.2*

ubuntu/linux-nvidia-6.5*

ubuntu/linux-nvidia-6.8<6.8.0-1035.38~22.04.1

6.8.0-1035.38~22.04.1

ubuntu/linux-nvidia-tegra<5.15.0-1039.39

5.15.0-1039.39

ubuntu/linux-nvidia-tegra-igx<5.15.0-1028.28

5.15.0-1028.28

ubuntu/linux-oem-5.17*

ubuntu/linux-oem-6.0*

ubuntu/linux-oem-6.1*

ubuntu/linux-oem-6.5*

ubuntu/linux-oracle<5.15.0-1083.89

5.15.0-1083.89

ubuntu/linux-oracle-6.5*

ubuntu/linux-oracle-6.8<6.8.0-1032.33~22.04.1

6.8.0-1032.33~22.04.1

ubuntu/linux-raspi<5.15.0-1080.83

5.15.0-1080.83

ubuntu/linux-realtime*

ubuntu/linux-riscv*

ubuntu/linux-riscv-5.19*

ubuntu/linux-riscv-6.5*

ubuntu/linux-riscv-6.8<6.8.0-78.78~22.04.1

6.8.0-78.78~22.04.1

ubuntu/linux-starfive-5.19*

ubuntu/linux-starfive-6.2*

ubuntu/linux-starfive-6.5*

ubuntu/linux-xilinx-zynqmp<5.15.0-1050.54

5.15.0-1050.54

ubuntu/linux-bluefield<5.15.0-1069.71

5.15.0-1069.71

ubuntu/linux-intel-iot-realtime<5.15.0-1079.81

5.15.0-1079.81

ubuntu/linux-realtime<5.15.0-1086.95

5.15.0-1086.95

ubuntu/linux-realtime-6.8<6.8.1-1030.31~22.04.1

6.8.1-1030.31~22.04.1

ubuntu/linux-aws-fips*

ubuntu/linux-azure-fips*

ubuntu/linux-gcp-fips*

ubuntu/linux-aws-fips<5.15.0-1086.93+fips1

5.15.0-1086.93+fips1

ubuntu/linux-azure-fips<5.15.0-1091.100+fips1

5.15.0-1091.100+fips1

ubuntu/linux-fips<5.15.0-142.152+fips1

5.15.0-142.152+fips1

ubuntu/linux-gcp-fips<5.15.0-1085.94+fips1

5.15.0-1085.94+fips1

ubuntu/linux<6.8.0-78.78

6.8.0-78.78

ubuntu/linux-aws<6.8.0-1035.37

6.8.0-1035.37

ubuntu/linux-azure<6.8.0-1034.39

6.8.0-1034.39

ubuntu/linux-azure-6.11<6.11.0-1018.18~24.04.1

6.11.0-1018.18~24.04.1

ubuntu/linux-azure-nvidia<6.8.0-1022.23

6.8.0-1022.23

ubuntu/linux-gcp<6.8.0-1036.38

6.8.0-1036.38

ubuntu/linux-gcp-6.11<6.11.0-1016.16~24.04.1

6.11.0-1016.16~24.04.1

ubuntu/linux-gke<6.8.0-1032.36

6.8.0-1032.36

ubuntu/linux-gkeop<6.8.0-1019.21

6.8.0-1019.21

ubuntu/linux-hwe-6.11<6.11.0-28.28~24.04.1

6.11.0-28.28~24.04.1

ubuntu/linux-ibm<6.8.0-1033.33

6.8.0-1033.33

ubuntu/linux-intel*

ubuntu/linux-lowlatency<6.8.0-78.78.1

6.8.0-78.78.1

ubuntu/linux-lowlatency-hwe-6.11<6.11.0-1015.16~24.04.2

6.11.0-1015.16~24.04.2

ubuntu/linux-nvidia<6.8.0-1035.38

6.8.0-1035.38

ubuntu/linux-nvidia-6.11<6.11.0-1011.11

6.11.0-1011.11

ubuntu/linux-nvidia-lowlatency<6.8.0-1035.38.1

6.8.0-1035.38.1

ubuntu/linux-nvidia-tegra<6.8.0-1009.9

6.8.0-1009.9

ubuntu/linux-oem-6.11<6.11.0-1024.24

6.11.0-1024.24

ubuntu/linux-oem-6.8*

ubuntu/linux-oracle<6.8.0-1032.33

6.8.0-1032.33

ubuntu/linux-raspi<6.8.0-1035.39

6.8.0-1035.39

ubuntu/linux-raspi-realtime*

ubuntu/linux-realtime*

ubuntu/linux-riscv*

ubuntu/linux-xilinx<6.8.0-1017.18

6.8.0-1017.18

ubuntu/linux-raspi-realtime<6.8.0-2028.29

6.8.0-2028.29

ubuntu/linux-realtime<6.8.1-1030.31

6.8.1-1030.31

ubuntu/linux-fips<6.8.0-78.78+fips1

6.8.0-78.78+fips1

ubuntu/linux-azure-fde*

ubuntu/linux-vmware*

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade ubuntu/linux-aws-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1147.157~18.04.1
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Fixed in 5.4.0-1152.159~18.04.1
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Fixed in 5.4.0-1150.159~18.04.1
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Fixed in 5.4.0-218.238~18.04.1
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Fixed in 5.4.0-1093.98~18.04.1
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Fixed in 5.4.0-1145.155~18.04.1
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Fixed in 5.4.0-1130.143~18.04.1
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Fixed in 5.4.0-218.238
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Fixed in 5.4.0-1147.157
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Fixed in 5.15.0-1086.93~20.04.1
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Fixed in 5.4.0-1152.159
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Fixed in 5.15.0-1091.100~20.04.1
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Fixed in 5.4.0-1106.113
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Fixed in 5.4.0-1150.159
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Fixed in 5.15.0-1085.94~20.04.1
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Fixed in 5.15.0-142.152~20.04.1
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Fixed in 5.4.0-1093.98
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Fixed in 5.15.0-1078.81~20.04.1
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Fixed in 5.15.0-1083.89~20.04.1
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Fixed in 5.4.0-1051.54
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Fixed in 5.4.0-1134.143
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Fixed in 5.15.0-142.152~20.04.1
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Fixed in 5.15.0-1039.39~20.04.1
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Fixed in 5.4.0-1145.155
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Fixed in 5.15.0-1083.89~20.04.1
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Fixed in 5.4.0-1130.143
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Fixed in 5.15.0-1081.85~20.04.1
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Fixed in 5.4.0-1065.69
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Fixed in 5.4.0-1147.157+fips1
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Fixed in 5.4.0-1153.160+fips1
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Fixed in 5.4.0-1121.131
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Fixed in 5.4.0-1150.159+fips1
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Fixed in 5.15.0-142.152
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Fixed in 5.15.0-1086.93
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Fixed in 6.8.0-1035.37~22.04.1
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Fixed in 5.15.0-1091.100
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Fixed in 6.8.0-1034.39~22.04.1
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Fixed in 5.15.0-1091.100.1
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Fixed in 5.15.0-1085.94
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Fixed in 6.8.0-1036.38~22.04.1
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Fixed in 5.15.0-1083.89
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Fixed in 5.15.0-1068.76
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Fixed in 6.8.0-78.78~22.04.1
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Fixed in 5.15.0-1078.81
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Fixed in 6.8.0-1033.33~22.04.1
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Fixed in 5.15.0-1081.87
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Fixed in 5.15.0-1082.87
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Fixed in 5.15.0-142.152
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Fixed in 6.8.0-78.78.1~22.04.1
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Fixed in 5.15.0-1080.81
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Fixed in 6.8.0-1035.38~22.04.1
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Fixed in 5.15.0-1039.39
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Fixed in 5.15.0-1028.28
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Fixed in 5.15.0-1083.89
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Fixed in 6.8.0-1032.33~22.04.1
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Fixed in 5.15.0-1080.83
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Fixed in 6.8.0-78.78~22.04.1
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Fixed in 5.15.0-1050.54
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Fixed in 5.15.0-1069.71
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Fixed in 5.15.0-1079.81
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Upgrade ubuntu/linux-realtime to a version that resolves this vulnerability.
Fixed in 5.15.0-1086.95
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Fixed in 6.8.1-1030.31~22.04.1
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Fixed in 5.15.0-1086.93+fips1
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Fixed in 5.15.0-1091.100+fips1
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Fixed in 5.15.0-142.152+fips1
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Fixed in 5.15.0-1085.94+fips1
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Upgrade ubuntu/linux to a version that resolves this vulnerability.
Fixed in 6.8.0-78.78
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Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.
Fixed in 6.8.0-1035.37
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Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.
Fixed in 6.8.0-1034.39
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Upgrade ubuntu/linux-azure-6.11 to a version that resolves this vulnerability.
Fixed in 6.11.0-1018.18~24.04.1
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Fixed in 6.8.0-1022.23
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Fixed in 6.8.0-1036.38
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Fixed in 6.11.0-1016.16~24.04.1
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Fixed in 6.8.0-1032.36
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Fixed in 6.8.0-1019.21
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Fixed in 6.11.0-28.28~24.04.1
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Fixed in 6.8.0-1033.33
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Upgrade ubuntu/linux-lowlatency to a version that resolves this vulnerability.
Fixed in 6.8.0-78.78.1
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Upgrade ubuntu/linux-lowlatency-hwe-6.11 to a version that resolves this vulnerability.
Fixed in 6.11.0-1015.16~24.04.2
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Upgrade ubuntu/linux-nvidia to a version that resolves this vulnerability.
Fixed in 6.8.0-1035.38
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Upgrade ubuntu/linux-nvidia-6.11 to a version that resolves this vulnerability.
Fixed in 6.11.0-1011.11
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Upgrade ubuntu/linux-nvidia-lowlatency to a version that resolves this vulnerability.
Fixed in 6.8.0-1035.38.1
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Upgrade ubuntu/linux-nvidia-tegra to a version that resolves this vulnerability.
Fixed in 6.8.0-1009.9
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Upgrade ubuntu/linux-oem-6.11 to a version that resolves this vulnerability.
Fixed in 6.11.0-1024.24
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Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.
Fixed in 6.8.0-1032.33
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Upgrade ubuntu/linux-raspi to a version that resolves this vulnerability.
Fixed in 6.8.0-1035.39
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Upgrade ubuntu/linux-xilinx to a version that resolves this vulnerability.
Fixed in 6.8.0-1017.18
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Upgrade ubuntu/linux-raspi-realtime to a version that resolves this vulnerability.
Fixed in 6.8.0-2028.29
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Upgrade ubuntu/linux-realtime to a version that resolves this vulnerability.
Fixed in 6.8.1-1030.31
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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

Apr 16, 2025

CVE Published

via OSV·03:15 PM

Data Sourced

via OSV·03:15 PM

DescriptionSeverityAffected Software

Frequently Asked Questions

Which systems are most likely to encounter this issue?

Systems using an affected Ubuntu kernel and PCIe switches whose upstream port exposes multiple functions are the relevant environment. The failure is especially frequent during PCIe hot-unplug operations, where pciehp removes devices in reverse order.

What condition triggers the use-after-free?

The issue occurs when functions other than function 0 are removed first on a PCIe switch with a multi-function-device upstream port. That can free an ASPM parent link while it is still referenced by remaining downstream ports, leading to general protection faults.

Is physical access required to exploit or trigger the issue?

The supplied severity vector lists local attack vector and low privileges, with no user interaction required. The description specifically identifies device-function removal and hot-unplug as triggering conditions.

UBUNTU-CVE-2024-58093: Use After Free

Affected Software

Remediation

Event History

Frequently Asked Questions

Which systems are most likely to encounter this issue?

What condition triggers the use-after-free?

Is physical access required to exploit or trigger the issue?

Company

Resources

Contact

Frequently Asked Questions

Which systems are most likely to encounter this issue?

What condition triggers the use-after-free?

Is physical access required to exploit or trigger the issue?