CVE-2026-43198: tcp: fix potential race in tcp_v6_syn_recv_sock()

Q: What access does an attacker need to exploit this issue?

The severity vector indicates that exploitation is possible over the network, with low attack complexity, no privileges required, and no user interaction required.

Q: What security impact could successful exploitation have?

The assigned critical severity vector indicates high impact to confidentiality, integrity, and availability.

Q: Which systems are in scope?

The affected software listed is the Linux kernel, including Debian's linux package. The flaw involves TCP IPv6 child-socket handling after a socket becomes visible in the TCP established-hash table.

Published May 6, 2026

Updated

In the Linux kernel, the following vulnerability has been resolved:

Other sources

tcp: fix potential race in tcpv6synrecvsock()

— Microsoft

Affected Software

256 affected componentsFixes available

Linux Linux kernel

Linux Linux kernel>=2.6.12.1<6.18.16

Linux Linux kernel>=6.19<6.19.6

Linux Linux kernel=2.6.12

Linux Linux kernel=2.6.12-rc2

Linux Linux kernel=2.6.12-rc3

Linux Linux kernel=2.6.12-rc4

Linux Linux kernel=2.6.12-rc5

Linux Linux kernel=7.0-rc1

ubuntu/linux<3.13.0-215.266

3.13.0-215.266

ubuntu/linux-aws<4.4.0-1157.163

4.4.0-1157.163

ubuntu/linux-azure<4.15.0-1205.220~14.04.1

4.15.0-1205.220~14.04.1

ubuntu/linux-lts-xenial<4.4.0-284.318~14.04.1

4.4.0-284.318~14.04.1

ubuntu/linux<4.4.0-284.318

4.4.0-284.318

ubuntu/linux-aws<4.4.0-1195.210

4.4.0-1195.210

ubuntu/linux-aws-hwe<4.15.0-1195.208~16.04.1

4.15.0-1195.208~16.04.1

ubuntu/linux-azure<4.15.0-1205.220~16.04.1

4.15.0-1205.220~16.04.1

ubuntu/linux-gcp<4.15.0-1188.205~16.04.1

4.15.0-1188.205~16.04.1

ubuntu/linux-hwe<4.15.0-254.266~16.04.1

4.15.0-254.266~16.04.1

ubuntu/linux-hwe-edge*

ubuntu/linux-kvm<4.4.0-1158.169

4.4.0-1158.169

ubuntu/linux-oracle<4.15.0-1158.169~16.04.1

4.15.0-1158.169~16.04.1

ubuntu/linux-fips<4.4.0-1127.134

4.4.0-1127.134

ubuntu/linux-fips*

ubuntu/linux<4.15.0-254.266

4.15.0-254.266

ubuntu/linux-aws<4.15.0-1195.208

4.15.0-1195.208

ubuntu/linux-aws-5.0*

ubuntu/linux-aws-5.3*

ubuntu/linux-aws-5.4<5.4.0-1162.173~18.04.1

5.4.0-1162.173~18.04.1

ubuntu/linux-azure*

ubuntu/linux-azure-4.15<4.15.0-1205.220

4.15.0-1205.220

ubuntu/linux-azure-5.3*

ubuntu/linux-azure-5.4<5.4.0-1167.173~18.04.1

5.4.0-1167.173~18.04.1

ubuntu/linux-azure-edge*

ubuntu/linux-gcp*

ubuntu/linux-gcp-4.15<4.15.0-1188.205

4.15.0-1188.205

ubuntu/linux-gcp-5.3*

ubuntu/linux-gcp-5.4<5.4.0-1165.174~18.04.1

5.4.0-1165.174~18.04.1

ubuntu/linux-gke-4.15*

ubuntu/linux-gke-5.4*

ubuntu/linux-gkeop-5.4*

ubuntu/linux-hwe*

ubuntu/linux-hwe-5.4<5.4.0-234.254~18.04.1

5.4.0-234.254~18.04.1

ubuntu/linux-hwe-edge*

ubuntu/linux-ibm-5.4<5.4.0-1108.113~18.04.1

5.4.0-1108.113~18.04.1

ubuntu/linux-kvm<4.15.0-1177.182

4.15.0-1177.182

ubuntu/linux-oem*

ubuntu/linux-oracle<4.15.0-1158.169

4.15.0-1158.169

ubuntu/linux-oracle-5.0*

ubuntu/linux-oracle-5.3*

ubuntu/linux-oracle-5.4<5.4.0-1161.171~18.04.1

5.4.0-1161.171~18.04.1

ubuntu/linux-raspi-5.4<5.4.0-1145.158~18.04.1

5.4.0-1145.158~18.04.1

ubuntu/linux-aws-fips<4.15.0-2133.139

4.15.0-2133.139

ubuntu/linux-azure-fips<4.15.0-2113.119

4.15.0-2113.119

ubuntu/linux-fips<4.15.0-1150.162

4.15.0-1150.162

ubuntu/linux-gcp-fips<4.15.0-2096.102

4.15.0-2096.102

ubuntu/linux-aws-fips*

ubuntu/linux-azure-fips*

ubuntu/linux-fips*

ubuntu/linux-gcp-fips*

ubuntu/linux<5.4.0-234.254

5.4.0-234.254

ubuntu/linux-aws<5.4.0-1162.173

5.4.0-1162.173

ubuntu/linux-aws-5.11*

ubuntu/linux-aws-5.13*

ubuntu/linux-aws-5.15<5.15.0-1114.121~20.04.1

5.15.0-1114.121~20.04.1

ubuntu/linux-aws-5.8*

ubuntu/linux-azure<5.4.0-1167.173

5.4.0-1167.173

ubuntu/linux-azure-5.11*

ubuntu/linux-azure-5.13*

ubuntu/linux-azure-5.15<5.15.0-1119.128~20.04.1

5.15.0-1119.128~20.04.1

ubuntu/linux-azure-5.8*

ubuntu/linux-azure-fde*

ubuntu/linux-azure-fde-5.15<5.15.0-1118.127~20.04.1

5.15.0-1118.127~20.04.1

ubuntu/linux-bluefield<5.4.0-1121.128

5.4.0-1121.128

ubuntu/linux-gcp<5.4.0-1165.174

5.4.0-1165.174

ubuntu/linux-gcp-5.11*

ubuntu/linux-gcp-5.13*

ubuntu/linux-gcp-5.15<5.15.0-1114.124~20.04.1

5.15.0-1114.124~20.04.1

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<5.15.0-190.200~20.04.1

5.15.0-190.200~20.04.1

ubuntu/linux-hwe-5.8*

ubuntu/linux-ibm<5.4.0-1108.113

5.4.0-1108.113

ubuntu/linux-ibm-5.15<5.15.0-1107.111~20.04.1

5.15.0-1107.111~20.04.1

ubuntu/linux-intel-5.13*

ubuntu/linux-intel-iotg-5.15<5.15.0-1108.114~20.04.1

5.15.0-1108.114~20.04.1

ubuntu/linux-iot<5.4.0-1066.69

5.4.0-1066.69

ubuntu/linux-kvm<5.4.0-1149.158

5.4.0-1149.158

ubuntu/linux-lowlatency-hwe-5.15<5.15.0-190.200~20.04.1

5.15.0-190.200~20.04.1

ubuntu/linux-nvidia-tegra-5.15<5.15.0-1065.67~20.04.1

5.15.0-1065.67~20.04.1

ubuntu/linux-oem-5.10*

ubuntu/linux-oem-5.13*

ubuntu/linux-oem-5.6*

ubuntu/linux-oracle<5.4.0-1160.170

5.4.0-1160.170

ubuntu/linux-oracle-5.11*

ubuntu/linux-oracle-5.13*

ubuntu/linux-oracle-5.15<5.15.0-1110.116~20.04.1

5.15.0-1110.116~20.04.1

ubuntu/linux-oracle-5.8*

ubuntu/linux-raspi<5.4.0-1145.158

5.4.0-1145.158

ubuntu/linux-raspi2*

ubuntu/linux-riscv*

ubuntu/linux-riscv-5.11*

ubuntu/linux-riscv-5.15<5.15.0-1107.111~20.04.1

5.15.0-1107.111~20.04.1

ubuntu/linux-riscv-5.8*

ubuntu/linux-xilinx-zynqmp<5.4.0-1080.84

5.4.0-1080.84

ubuntu/linux-aws-fips<5.4.0-1163.174+fips1

5.4.0-1163.174+fips1

ubuntu/linux-azure-fips<5.4.0-1167.173+fips1

5.4.0-1167.173+fips1

ubuntu/linux-fips<5.4.0-1136.146

5.4.0-1136.146

ubuntu/linux-gcp-fips<5.4.0-1165.174+fips1

5.4.0-1165.174+fips1

ubuntu/linux-aws-fips*

ubuntu/linux-azure-fips*

ubuntu/linux-fips*

ubuntu/linux-gcp-fips*

ubuntu/linux<5.15.0-187.197

5.15.0-187.197

ubuntu/linux-allwinner-5.19*

ubuntu/linux-aws<5.15.0-1113.120

5.15.0-1113.120

ubuntu/linux-aws-5.19*

ubuntu/linux-aws-6.2*

ubuntu/linux-aws-6.5*

ubuntu/linux-aws-6.8<6.8.0-1062.65~22.04.2

6.8.0-1062.65~22.04.2

ubuntu/linux-azure<5.15.0-1118.127

5.15.0-1118.127

ubuntu/linux-azure-5.19*

ubuntu/linux-azure-6.2*

ubuntu/linux-azure-6.5*

ubuntu/linux-azure-6.8<6.8.0-1064.72~22.04.1

6.8.0-1064.72~22.04.1

ubuntu/linux-azure-fde<5.15.0-1118.127

5.15.0-1118.127

ubuntu/linux-azure-fde-5.19*

ubuntu/linux-azure-fde-6.2*

ubuntu/linux-azure-fde-6.8<6.8.0-1063.70~22.04.1

6.8.0-1063.70~22.04.1

ubuntu/linux-gcp<5.15.0-1114.124

5.15.0-1114.124

ubuntu/linux-gcp-5.19*

ubuntu/linux-gcp-6.2*

ubuntu/linux-gcp-6.5*

ubuntu/linux-gcp-6.8<6.8.0-1065.73~22.04.1

6.8.0-1065.73~22.04.1

ubuntu/linux-gke<5.15.0-1110.116

5.15.0-1110.116

ubuntu/linux-gkeop<5.15.0-1096.104

5.15.0-1096.104

ubuntu/linux-hwe-5.19*

ubuntu/linux-hwe-6.2*

ubuntu/linux-hwe-6.5*

ubuntu/linux-hwe-6.8<6.8.0-138.138~22.04.1

6.8.0-138.138~22.04.1

ubuntu/linux-ibm<5.15.0-1107.111

5.15.0-1107.111

ubuntu/linux-ibm-6.8<6.8.0-1062.63~22.04.1

6.8.0-1062.63~22.04.1

ubuntu/linux-intel-iot-realtime*

ubuntu/linux-intel-iotg<5.15.0-1108.114

5.15.0-1108.114

ubuntu/linux-kvm<5.15.0-1105.110

5.15.0-1105.110

ubuntu/linux-lowlatency<5.15.0-190.200

5.15.0-190.200

ubuntu/linux-lowlatency-hwe-5.19*

ubuntu/linux-lowlatency-hwe-6.2*

ubuntu/linux-lowlatency-hwe-6.5*

ubuntu/linux-lowlatency-hwe-6.8<6.8.0-137.137.1~22.04.1

6.8.0-137.137.1~22.04.1

ubuntu/linux-nvidia<5.15.0-1108.109

5.15.0-1108.109

ubuntu/linux-nvidia-6.2*

ubuntu/linux-nvidia-6.5*

ubuntu/linux-nvidia-6.8<6.8.0-1060.63~22.04.1

6.8.0-1060.63~22.04.1

ubuntu/linux-nvidia-tegra<5.15.0-1065.67

5.15.0-1065.67

ubuntu/linux-nvidia-tegra-igx<5.15.0-1054.54

5.15.0-1054.54

ubuntu/linux-oem-5.17*

ubuntu/linux-oem-6.0*

ubuntu/linux-oem-6.1*

ubuntu/linux-oem-6.5*

ubuntu/linux-oracle<5.15.0-1110.116

5.15.0-1110.116

ubuntu/linux-oracle-6.5*

ubuntu/linux-oracle-6.8<6.8.0-1059.62~22.04.1

6.8.0-1059.62~22.04.1

ubuntu/linux-raspi<5.15.0-1108.111

5.15.0-1108.111

ubuntu/linux-realtime*

ubuntu/linux-riscv*

ubuntu/linux-riscv-5.19*

ubuntu/linux-riscv-6.5*

ubuntu/linux-riscv-6.8<6.8.0-137.137~22.04.1

6.8.0-137.137~22.04.1

ubuntu/linux-starfive-5.19*

ubuntu/linux-starfive-6.2*

ubuntu/linux-starfive-6.5*

ubuntu/linux-xilinx-zynqmp<5.15.0-1076.80

5.15.0-1076.80

ubuntu/linux-bluefield<5.15.0-1097.99

5.15.0-1097.99

ubuntu/linux-intel-iot-realtime<5.15.0-1105.107

5.15.0-1105.107

ubuntu/linux-realtime<5.15.0-1112.121

5.15.0-1112.121

ubuntu/linux-realtime-6.8<6.8.1-1057.58~22.04.1

6.8.1-1057.58~22.04.1

ubuntu/linux-aws-fips*

ubuntu/linux-azure-fips*

ubuntu/linux-fips*

ubuntu/linux-gcp-fips*

ubuntu/linux-aws-fips<5.15.0-1113.120+fips1

5.15.0-1113.120+fips1

ubuntu/linux-azure-fips<5.15.0-1118.127+fips1

5.15.0-1118.127+fips1

ubuntu/linux-fips<5.15.0-190.200+fips1

5.15.0-190.200+fips1

ubuntu/linux-gcp-fips<5.15.0-1114.124+fips1

5.15.0-1114.124+fips1

ubuntu/linux<6.8.0-137.137

6.8.0-137.137

ubuntu/linux-aws<6.8.0-1062.65

6.8.0-1062.65

ubuntu/linux-aws-6.14*

ubuntu/linux-aws-6.17*

ubuntu/linux-azure<6.8.0-1064.72

6.8.0-1064.72

ubuntu/linux-azure-6.11*

ubuntu/linux-azure-6.14*

ubuntu/linux-azure-6.17<6.17.0-1022.22

6.17.0-1022.22

ubuntu/linux-azure-fde<6.8.0-1063.70

6.8.0-1063.70

ubuntu/linux-azure-fde-6.14*

ubuntu/linux-azure-fde-6.17*

ubuntu/linux-azure-nvidia*

ubuntu/linux-azure-nvidia-6.14*

ubuntu/linux-gcp<6.8.0-1065.73

6.8.0-1065.73

ubuntu/linux-gcp-6.11*

ubuntu/linux-gcp-6.14*

ubuntu/linux-gcp-6.17<6.17.0-1022.25

6.17.0-1022.25

ubuntu/linux-gke<6.8.0-1060.68

6.8.0-1060.68

ubuntu/linux-gkeop<6.8.0-1047.51

6.8.0-1047.51

ubuntu/linux-hwe-6.11*

ubuntu/linux-hwe-6.14*

ubuntu/linux-hwe-6.17<6.17.0-42.42

6.17.0-42.42

ubuntu/linux-ibm<6.8.0-1062.63

6.8.0-1062.63

ubuntu/linux-lowlatency<6.8.0-137.137.1

6.8.0-137.137.1

ubuntu/linux-lowlatency-hwe-6.11*

ubuntu/linux-nvidia<6.8.0-1060.63

6.8.0-1060.63

ubuntu/linux-nvidia-6.11*

ubuntu/linux-nvidia-6.17<6.17.0-1031.31

6.17.0-1031.31

ubuntu/linux-nvidia-lowlatency<6.8.0-1060.63.1

6.8.0-1060.63.1

ubuntu/linux-nvidia-tegra<6.8.0-1031.32

6.8.0-1031.32

ubuntu/linux-oem-6.11*

ubuntu/linux-oem-6.14*

ubuntu/linux-oem-6.17<6.17.0-1032.32

6.17.0-1032.32

ubuntu/linux-oem-6.8*

ubuntu/linux-oracle<6.8.0-1059.62

6.8.0-1059.62

ubuntu/linux-oracle-6.14*

ubuntu/linux-oracle-6.17<6.17.0-1020.20

6.17.0-1020.20

ubuntu/linux-raspi<6.8.0-1062.66

6.8.0-1062.66

ubuntu/linux-raspi-realtime*

ubuntu/linux-realtime*

ubuntu/linux-riscv*

ubuntu/linux-riscv-6.14*

ubuntu/linux-riscv-6.17*

ubuntu/linux-vmware<6.8.0-1008.8

6.8.0-1008.8

ubuntu/linux-xilinx<6.8.0-1034.35

6.8.0-1034.35

ubuntu/linux-bluefield<6.8.0-1028.33

6.8.0-1028.33

ubuntu/linux-raspi-realtime<6.8.0-2051.53

6.8.0-2051.53

ubuntu/linux-realtime<6.8.1-1057.58

6.8.1-1057.58

ubuntu/linux-realtime-6.14*

ubuntu/linux-realtime-6.17<6.17.0-1019.22

6.17.0-1019.22

ubuntu/linux-aws-fips<6.8.0-1062.65+fips1

6.8.0-1062.65+fips1

ubuntu/linux-azure-fips<6.8.0-1064.72+fips1

6.8.0-1064.72+fips1

ubuntu/linux-fips<6.8.0-137.137+fips1

6.8.0-137.137+fips1

ubuntu/linux-gcp-fips<6.8.0-1065.73+fips1

6.8.0-1065.73+fips1

ubuntu/linux*

ubuntu/linux-aws*

ubuntu/linux-azure*

ubuntu/linux-azure-fde*

ubuntu/linux-gcp*

ubuntu/linux-oracle*

ubuntu/linux-raspi*

ubuntu/linux-realtime*

ubuntu/linux-riscv*

debian/linux<=6.1.176-1, <=6.12.107-1

6.1.190-16.12.115-27.2.15-17.3.3-1

debian/linux-6.12

6.12.115-2~deb12u1

IBM Cloud Pak for Data System (Yosemite 1.0)<=11.3.1.2-IF1 - 11.3.1.2-IF2

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade ubuntu/linux to a version that resolves this vulnerability.
Fixed in 3.13.0-215.266
Upgrade
Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.
Fixed in 4.4.0-1157.163
Upgrade
Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.
Fixed in 4.15.0-1205.220~14.04.1
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Upgrade ubuntu/linux-lts-xenial to a version that resolves this vulnerability.
Fixed in 4.4.0-284.318~14.04.1
Upgrade
Upgrade ubuntu/linux to a version that resolves this vulnerability.
Fixed in 4.4.0-284.318
Upgrade
Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.
Fixed in 4.4.0-1195.210
Upgrade
Upgrade ubuntu/linux-aws-hwe to a version that resolves this vulnerability.
Fixed in 4.15.0-1195.208~16.04.1
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Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.
Fixed in 4.15.0-1205.220~16.04.1
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Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.
Fixed in 4.15.0-1188.205~16.04.1
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Fixed in 4.15.0-254.266~16.04.1
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Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.
Fixed in 4.4.0-1158.169
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Fixed in 4.15.0-1158.169~16.04.1
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Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.
Fixed in 4.4.0-1127.134
Upgrade
Upgrade ubuntu/linux to a version that resolves this vulnerability.
Fixed in 4.15.0-254.266
Upgrade
Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.
Fixed in 4.15.0-1195.208
Upgrade
Upgrade ubuntu/linux-aws-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1162.173~18.04.1
Upgrade
Upgrade ubuntu/linux-azure-4.15 to a version that resolves this vulnerability.
Fixed in 4.15.0-1205.220
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Upgrade ubuntu/linux-azure-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1167.173~18.04.1
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Upgrade ubuntu/linux-gcp-4.15 to a version that resolves this vulnerability.
Fixed in 4.15.0-1188.205
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Upgrade ubuntu/linux-gcp-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1165.174~18.04.1
Upgrade
Upgrade ubuntu/linux-hwe-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-234.254~18.04.1
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Fixed in 5.4.0-1108.113~18.04.1
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Fixed in 4.15.0-1177.182
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Fixed in 4.15.0-1158.169
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Upgrade ubuntu/linux-oracle-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1161.171~18.04.1
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Upgrade ubuntu/linux-raspi-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1145.158~18.04.1
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Fixed in 4.15.0-2133.139
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Fixed in 4.15.0-2113.119
Upgrade
Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.
Fixed in 4.15.0-1150.162
Upgrade
Upgrade ubuntu/linux-gcp-fips to a version that resolves this vulnerability.
Fixed in 4.15.0-2096.102
Upgrade
Upgrade ubuntu/linux to a version that resolves this vulnerability.
Fixed in 5.4.0-234.254
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Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.
Fixed in 5.4.0-1162.173
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Upgrade ubuntu/linux-aws-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1114.121~20.04.1
Upgrade
Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.
Fixed in 5.4.0-1167.173
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Upgrade ubuntu/linux-azure-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1119.128~20.04.1
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Upgrade ubuntu/linux-azure-fde-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1118.127~20.04.1
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Fixed in 5.4.0-1121.128
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Fixed in 5.4.0-1165.174
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Upgrade ubuntu/linux-gcp-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1114.124~20.04.1
Upgrade
Upgrade ubuntu/linux-hwe-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-190.200~20.04.1
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Upgrade ubuntu/linux-ibm to a version that resolves this vulnerability.
Fixed in 5.4.0-1108.113
Upgrade
Upgrade ubuntu/linux-ibm-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1107.111~20.04.1
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Upgrade ubuntu/linux-intel-iotg-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1108.114~20.04.1
Upgrade
Upgrade ubuntu/linux-iot to a version that resolves this vulnerability.
Fixed in 5.4.0-1066.69
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Fixed in 5.4.0-1149.158
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Fixed in 5.15.0-190.200~20.04.1
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Fixed in 5.15.0-1065.67~20.04.1
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Fixed in 5.4.0-1160.170
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Fixed in 5.15.0-1110.116~20.04.1
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Fixed in 5.4.0-1145.158
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Fixed in 5.15.0-1107.111~20.04.1
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Fixed in 5.4.0-1080.84
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Fixed in 5.4.0-1163.174+fips1
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Fixed in 5.4.0-1167.173+fips1
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Fixed in 5.4.0-1136.146
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Fixed in 5.4.0-1165.174+fips1
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Fixed in 5.15.0-187.197
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Fixed in 5.15.0-1113.120
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Fixed in 6.8.0-1062.65~22.04.2
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Fixed in 5.15.0-1118.127
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Fixed in 6.8.0-1064.72~22.04.1
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Fixed in 5.15.0-1118.127
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Fixed in 6.8.0-1063.70~22.04.1
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Fixed in 5.15.0-1114.124
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Fixed in 6.8.0-1065.73~22.04.1
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Fixed in 5.15.0-1110.116
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Fixed in 5.15.0-1096.104
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Fixed in 6.8.0-138.138~22.04.1
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Fixed in 5.15.0-1107.111
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Fixed in 6.8.0-1062.63~22.04.1
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Fixed in 5.15.0-1108.114
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Fixed in 5.15.0-1105.110
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Fixed in 5.15.0-190.200
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Fixed in 6.8.0-137.137.1~22.04.1
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Fixed in 5.15.0-1108.109
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Fixed in 6.8.0-1060.63~22.04.1
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Fixed in 5.15.0-1065.67
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Fixed in 5.15.0-1054.54
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Fixed in 5.15.0-1110.116
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Fixed in 6.8.0-1059.62~22.04.1
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Fixed in 5.15.0-1108.111
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Fixed in 6.8.0-137.137~22.04.1
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Fixed in 5.15.0-1076.80
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Fixed in 5.15.0-1097.99
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Fixed in 5.15.0-1105.107
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Fixed in 5.15.0-1112.121
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Fixed in 6.8.1-1057.58~22.04.1
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Fixed in 5.15.0-1113.120+fips1
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Fixed in 5.15.0-1118.127+fips1
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Fixed in 5.15.0-190.200+fips1
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Fixed in 5.15.0-1114.124+fips1
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Fixed in 6.8.0-137.137
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Fixed in 6.8.0-1062.65
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Fixed in 6.8.0-1064.72
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Fixed in 6.17.0-1022.22
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Fixed in 6.8.0-1063.70
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Fixed in 6.8.0-1065.73
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Fixed in 6.17.0-1022.25
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Fixed in 6.8.0-1060.68
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Fixed in 6.8.0-1047.51
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Fixed in 6.17.0-42.42
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Fixed in 6.8.0-1062.63
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Fixed in 6.8.0-137.137.1
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Fixed in 6.8.0-1060.63
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Fixed in 6.17.0-1031.31
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Fixed in 6.8.0-1060.63.1
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Fixed in 6.8.0-1031.32
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Fixed in 6.17.0-1032.32
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Fixed in 6.8.0-1059.62
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Fixed in 6.17.0-1020.20
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Fixed in 6.8.0-1062.66
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Fixed in 6.8.0-1008.8
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Fixed in 6.8.0-1034.35
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Fixed in 6.8.0-1028.33
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Fixed in 6.8.0-2051.53
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Fixed in 6.8.1-1057.58
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Fixed in 6.17.0-1019.22
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Fixed in 6.8.0-1062.65+fips1
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Fixed in 6.8.0-1064.72+fips1
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Fixed in 6.8.0-137.137+fips1
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Fixed in 6.8.0-1065.73+fips1
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Fixed in 6.1.190-1Fixed in 6.12.115-2Fixed in 7.2.15-1Fixed in 7.3.3-1
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Fixed in 6.12.115-2~deb12u1

Event History

May 6, 2026

CVE Published

via MITRE·11:28 AM

Data Sourced

via MITRE·11:28 AM

DescriptionSeverity

Data Sourced

via OSV·12:16 PM

DescriptionSeverityAffected Software

Data Sourced

via NVD·12:16 PM

RemedyDescriptionSeverityWeaknessAffected Software

Data Sourced

via Red Hat·01:11 PM

DescriptionSeverityAffected Software

May 7, 2026

Data Sourced

via Microsoft·08:05 AM

DescriptionSeverityWeakness

Oct 21, 2026

Data Sourced

via IBM·12:00 AM

DescriptionAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

What access does an attacker need to exploit this issue?

The severity vector indicates that exploitation is possible over the network, with low attack complexity, no privileges required, and no user interaction required.

What security impact could successful exploitation have?

The assigned critical severity vector indicates high impact to confidentiality, integrity, and availability.

Which systems are in scope?

The affected software listed is the Linux kernel, including Debian's linux package. The flaw involves TCP IPv6 child-socket handling after a socket becomes visible in the TCP established-hash table.

CVE-2026-43198: tcp: fix potential race in tcp_v6_syn_recv_sock()

Other sources

Affected Software

Remediation

Event History

Parent advisories

Peer vulnerabilities

Frequently Asked Questions

What access does an attacker need to exploit this issue?

What security impact could successful exploitation have?

Which systems are in scope?

Company

Resources

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