UBUNTU-CVE-2025-38352: High severity ubuntu/linux vulnerability

Published Jul 22, 2025

Updated

In the Linux kernel, the following vulnerability has been resolved: posix-cpu-timers: fix race between handleposixcputimers() and posixcputimerdel() If an exiting non-autoreaping task has already passed exitnotify() and calls handleposixcputimers() from IRQ, it can be reaped by its parent or debugger right after unlocktasksighand(). If a concurrent posixcputimerdel() runs at that moment, it won't be able to detect timer->it.cpu.firing != 0: cputimertaskrcu() and/or locktasksighand() will fail. Add the tsk->exitstate check into runposixcputimers() to fix this. This fix is not needed if CONFIGPOSIXCPUTIMERSTASKWORK=y, because exittaskwork() is called before exitnotify(). But the check still makes sense, taskworkadd(&tsk->posixcputimerswork.work) will fail anyway in this case.

Affected Software

223 affected componentsFixes available

ubuntu/linux<3.13.0-210.261

3.13.0-210.261

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<5.4.0-1152.162~18.04.1

5.4.0-1152.162~18.04.1

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<5.4.0-1156.163~18.04.1

5.4.0-1156.163~18.04.1

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<5.4.0-1155.164~18.04.1

5.4.0-1155.164~18.04.1

ubuntu/linux-gke-4.15*

ubuntu/linux-gke-5.4*

ubuntu/linux-gkeop-5.4*

ubuntu/linux-hwe*

ubuntu/linux-hwe-5.4<5.4.0-223.243~18.04.1

5.4.0-223.243~18.04.1

ubuntu/linux-hwe-edge*

ubuntu/linux-ibm-5.4<5.4.0-1098.103~18.04.1

5.4.0-1098.103~18.04.1

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<5.4.0-1150.160~18.04.1

5.4.0-1150.160~18.04.1

ubuntu/linux-raspi-5.4<5.4.0-1135.148~18.04.1

5.4.0-1135.148~18.04.1

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<5.4.0-223.243

5.4.0-223.243

ubuntu/linux-aws<5.4.0-1152.162

5.4.0-1152.162

ubuntu/linux-aws-5.11*

ubuntu/linux-aws-5.13*

ubuntu/linux-aws-5.15<5.15.0-1092.99~20.04.1

5.15.0-1092.99~20.04.1

ubuntu/linux-aws-5.8*

ubuntu/linux-azure<5.4.0-1156.163

5.4.0-1156.163

ubuntu/linux-azure-5.11*

ubuntu/linux-azure-5.13*

ubuntu/linux-azure-5.15<5.15.0-1096.105~20.04.1

5.15.0-1096.105~20.04.1

ubuntu/linux-azure-5.8*

ubuntu/linux-azure-fde*

ubuntu/linux-bluefield<5.4.0-1111.118

5.4.0-1111.118

ubuntu/linux-gcp<5.4.0-1155.164

5.4.0-1155.164

ubuntu/linux-gcp-5.11*

ubuntu/linux-gcp-5.13*

ubuntu/linux-gcp-5.15<5.15.0-1092.101~20.04.1

5.15.0-1092.101~20.04.1

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<5.15.0-156.166~20.04.1

5.15.0-156.166~20.04.1

ubuntu/linux-hwe-5.8*

ubuntu/linux-ibm<5.4.0-1098.103

5.4.0-1098.103

ubuntu/linux-ibm-5.15<5.15.0-1086.89~20.04.1

5.15.0-1086.89~20.04.1

ubuntu/linux-intel-5.13*

ubuntu/linux-intel-iotg-5.15<5.15.0-1087.93~20.04.1

5.15.0-1087.93~20.04.1

ubuntu/linux-iot<5.4.0-1056.59

5.4.0-1056.59

ubuntu/linux-kvm<5.4.0-1139.148

5.4.0-1139.148

ubuntu/linux-lowlatency-hwe-5.15<5.15.0-156.166~20.04.1

5.15.0-156.166~20.04.1

ubuntu/linux-nvidia-tegra-5.15<5.15.0-1045.45~20.04.1

5.15.0-1045.45~20.04.1

ubuntu/linux-oem-5.10*

ubuntu/linux-oem-5.13*

ubuntu/linux-oem-5.6*

ubuntu/linux-oracle<5.4.0-1150.160

5.4.0-1150.160

ubuntu/linux-oracle-5.11*

ubuntu/linux-oracle-5.13*

ubuntu/linux-oracle-5.15<5.15.0-1090.96~20.04.1

5.15.0-1090.96~20.04.1

ubuntu/linux-oracle-5.8*

ubuntu/linux-raspi<5.4.0-1135.148

5.4.0-1135.148

ubuntu/linux-raspi2*

ubuntu/linux-riscv*

ubuntu/linux-riscv-5.11*

ubuntu/linux-riscv-5.15<5.15.0-1087.91~20.04.1

5.15.0-1087.91~20.04.1

ubuntu/linux-riscv-5.8*

ubuntu/linux-xilinx-zynqmp<5.4.0-1070.74

5.4.0-1070.74

ubuntu/linux-aws-fips<5.4.0-1152.162+fips1

5.4.0-1152.162+fips1

ubuntu/linux-azure-fips<5.4.0-1157.164+fips1

5.4.0-1157.164+fips1

ubuntu/linux-fips<5.4.0-1126.136

5.4.0-1126.136

ubuntu/linux-gcp-fips<5.4.0-1155.164+fips1

5.4.0-1155.164+fips1

ubuntu/linux-aws-fips*

ubuntu/linux-azure-fips*

ubuntu/linux-fips*

ubuntu/linux-gcp-fips*

ubuntu/linux<5.15.0-156.166

5.15.0-156.166

ubuntu/linux-allwinner-5.19*

ubuntu/linux-aws<5.15.0-1092.99

5.15.0-1092.99

ubuntu/linux-aws-5.19*

ubuntu/linux-aws-6.2*

ubuntu/linux-aws-6.5*

ubuntu/linux-aws-6.8<6.8.0-1042.44~22.04.1

6.8.0-1042.44~22.04.1

ubuntu/linux-azure<5.15.0-1096.105

5.15.0-1096.105

ubuntu/linux-azure-5.19*

ubuntu/linux-azure-6.2*

ubuntu/linux-azure-6.5*

ubuntu/linux-azure-6.8<6.8.0-1044.50~22.04.1

6.8.0-1044.50~22.04.1

ubuntu/linux-azure-fde<5.15.0-1096.105.1

5.15.0-1096.105.1

ubuntu/linux-azure-fde-5.19*

ubuntu/linux-azure-fde-6.2*

ubuntu/linux-azure-fde-6.8<6.8.0-1046.53~22.04.1

6.8.0-1046.53~22.04.1

ubuntu/linux-gcp<5.15.0-1092.101

5.15.0-1092.101

ubuntu/linux-gcp-5.19*

ubuntu/linux-gcp-6.2*

ubuntu/linux-gcp-6.5*

ubuntu/linux-gcp-6.8<6.8.0-1043.46~22.04.1

6.8.0-1043.46~22.04.1

ubuntu/linux-gke<5.15.0-1089.95

5.15.0-1089.95

ubuntu/linux-gkeop<5.15.0-1075.83

5.15.0-1075.83

ubuntu/linux-hwe-5.19*

ubuntu/linux-hwe-6.2*

ubuntu/linux-hwe-6.5*

ubuntu/linux-hwe-6.8<6.8.0-87.88~22.04.1

6.8.0-87.88~22.04.1

ubuntu/linux-ibm<5.15.0-1086.89

5.15.0-1086.89

ubuntu/linux-ibm-6.8<6.8.0-1040.40~22.04.1

6.8.0-1040.40~22.04.1

ubuntu/linux-intel-iot-realtime*

ubuntu/linux-intel-iotg<5.15.0-1087.93

5.15.0-1087.93

ubuntu/linux-kvm<5.15.0-1088.93

5.15.0-1088.93

ubuntu/linux-lowlatency<5.15.0-156.166

5.15.0-156.166

ubuntu/linux-lowlatency-hwe-5.19*

ubuntu/linux-lowlatency-hwe-6.2*

ubuntu/linux-lowlatency-hwe-6.5*

ubuntu/linux-lowlatency-hwe-6.8<6.8.0-87.88.1~22.04.1

6.8.0-87.88.1~22.04.1

ubuntu/linux-nvidia<5.15.0-1087.88

5.15.0-1087.88

ubuntu/linux-nvidia-6.2*

ubuntu/linux-nvidia-6.5*

ubuntu/linux-nvidia-6.8<6.8.0-1042.45~22.04.1

6.8.0-1042.45~22.04.1

ubuntu/linux-nvidia-tegra<5.15.0-1045.45

5.15.0-1045.45

ubuntu/linux-nvidia-tegra-igx<5.15.0-1034.34

5.15.0-1034.34

ubuntu/linux-oem-5.17*

ubuntu/linux-oem-6.0*

ubuntu/linux-oem-6.1*

ubuntu/linux-oem-6.5*

ubuntu/linux-oracle<5.15.0-1090.96

5.15.0-1090.96

ubuntu/linux-oracle-6.5*

ubuntu/linux-oracle-6.8<6.8.0-1039.40~22.04.1

6.8.0-1039.40~22.04.1

ubuntu/linux-raspi<5.15.0-1086.89

5.15.0-1086.89

ubuntu/linux-realtime*

ubuntu/linux-riscv*

ubuntu/linux-riscv-5.19*

ubuntu/linux-riscv-6.5*

ubuntu/linux-riscv-6.8<6.8.0-87.88~22.04.1

6.8.0-87.88~22.04.1

ubuntu/linux-starfive-5.19*

ubuntu/linux-starfive-6.2*

ubuntu/linux-starfive-6.5*

ubuntu/linux-xilinx-zynqmp<5.15.0-1056.60

5.15.0-1056.60

ubuntu/linux-bluefield<5.15.0-1076.78

5.15.0-1076.78

ubuntu/linux-intel-iot-realtime<5.15.0-1085.87

5.15.0-1085.87

ubuntu/linux-realtime<5.15.0-1092.101

5.15.0-1092.101

ubuntu/linux-realtime-6.8<6.8.1-1037.38~22.04.1

6.8.1-1037.38~22.04.1

ubuntu/linux-aws-fips*

ubuntu/linux-azure-fips*

ubuntu/linux-fips*

ubuntu/linux-gcp-fips*

ubuntu/linux-aws-fips<5.15.0-1092.99+fips1

5.15.0-1092.99+fips1

ubuntu/linux-azure-fips<5.15.0-1096.105+fips1

5.15.0-1096.105+fips1

ubuntu/linux-fips<5.15.0-156.166+fips1

5.15.0-156.166+fips1

ubuntu/linux-gcp-fips<5.15.0-1092.101+fips1

5.15.0-1092.101+fips1

ubuntu/linux<6.8.0-87.88

6.8.0-87.88

ubuntu/linux-aws<6.8.0-1042.44

6.8.0-1042.44

ubuntu/linux-aws-6.14<6.14.0-1013.13~24.04.1

6.14.0-1013.13~24.04.1

ubuntu/linux-azure<6.8.0-1044.50

6.8.0-1044.50

ubuntu/linux-azure-6.11*

ubuntu/linux-azure-fde<6.8.0-1046.53

6.8.0-1046.53

ubuntu/linux-azure-nvidia<6.8.0-1029.32

6.8.0-1029.32

ubuntu/linux-azure-nvidia-6.14<6.14.0-1007.7

6.14.0-1007.7

ubuntu/linux-gcp<6.8.0-1043.46

6.8.0-1043.46

ubuntu/linux-gcp-6.11*

ubuntu/linux-gcp-6.14<6.14.0-1016.17~24.04.1

6.14.0-1016.17~24.04.1

ubuntu/linux-gke<6.8.0-1039.44

6.8.0-1039.44

ubuntu/linux-gkeop<6.8.0-1026.29

6.8.0-1026.29

ubuntu/linux-hwe-6.11*

ubuntu/linux-ibm<6.8.0-1040.40

6.8.0-1040.40

ubuntu/linux-intel*

ubuntu/linux-lowlatency<6.8.0-87.88.1

6.8.0-87.88.1

ubuntu/linux-lowlatency-hwe-6.11*

ubuntu/linux-nvidia<6.8.0-1042.45

6.8.0-1042.45

ubuntu/linux-nvidia-6.11<6.11.0-1016.16

6.11.0-1016.16

ubuntu/linux-nvidia-lowlatency<6.8.0-1042.45.1

6.8.0-1042.45.1

ubuntu/linux-nvidia-tegra<6.8.0-1012.12

6.8.0-1012.12

ubuntu/linux-oem-6.11*

ubuntu/linux-oem-6.14<6.14.0-1012.12

6.14.0-1012.12

ubuntu/linux-oem-6.8*

ubuntu/linux-oracle<6.8.0-1039.40

6.8.0-1039.40

ubuntu/linux-oracle-6.14<6.14.0-1013.13~24.04.1

6.14.0-1013.13~24.04.1

ubuntu/linux-raspi<6.8.0-1042.46

6.8.0-1042.46

ubuntu/linux-raspi-realtime*

ubuntu/linux-realtime*

ubuntu/linux-riscv*

ubuntu/linux-riscv-6.14<6.14.0-32.32.1~24.04.1

6.14.0-32.32.1~24.04.1

ubuntu/linux-xilinx<6.8.0-1019.20

6.8.0-1019.20

ubuntu/linux-bluefield<6.8.0-1013.17

6.8.0-1013.17

ubuntu/linux-raspi-realtime<6.8.0-2033.34

6.8.0-2033.34

ubuntu/linux-realtime<6.8.1-1037.38

6.8.1-1037.38

ubuntu/linux-realtime-6.14<6.14.0-1012.12~24.04.1

6.14.0-1012.12~24.04.1

ubuntu/linux-aws-fips<6.8.0-1042.44+fips1

6.8.0-1042.44+fips1

ubuntu/linux-azure-fips<6.8.0-1044.50+fips1

6.8.0-1044.50+fips1

ubuntu/linux-fips<6.8.0-87.88+fips1

6.8.0-87.88+fips1

ubuntu/linux-gcp-fips<6.8.0-1043.46+fips1

6.8.0-1043.46+fips1

ubuntu/linux-azure-fde*

ubuntu/linux-vmware*

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade ubuntu/linux to a version that resolves this vulnerability.
Fixed in 3.13.0-210.261
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 5.4.0-1152.162~18.04.1
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 5.4.0-1156.163~18.04.1
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 5.4.0-1155.164~18.04.1
Upgrade
Upgrade ubuntu/linux-hwe-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-223.243~18.04.1
Upgrade
Upgrade ubuntu/linux-ibm-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1098.103~18.04.1
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 5.4.0-1150.160~18.04.1
Upgrade
Upgrade ubuntu/linux-raspi-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1135.148~18.04.1
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 5.4.0-223.243
Upgrade
Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.
Fixed in 5.4.0-1152.162
Upgrade
Upgrade ubuntu/linux-aws-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1092.99~20.04.1
Upgrade
Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.
Fixed in 5.4.0-1156.163
Upgrade
Upgrade ubuntu/linux-azure-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1096.105~20.04.1
Upgrade
Upgrade ubuntu/linux-bluefield to a version that resolves this vulnerability.
Fixed in 5.4.0-1111.118
Upgrade
Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.
Fixed in 5.4.0-1155.164
Upgrade
Upgrade ubuntu/linux-gcp-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1092.101~20.04.1
Upgrade
Upgrade ubuntu/linux-hwe-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-156.166~20.04.1
Upgrade
Upgrade ubuntu/linux-ibm to a version that resolves this vulnerability.
Fixed in 5.4.0-1098.103
Upgrade
Upgrade ubuntu/linux-ibm-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1086.89~20.04.1
Upgrade
Upgrade ubuntu/linux-intel-iotg-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1087.93~20.04.1
Upgrade
Upgrade ubuntu/linux-iot to a version that resolves this vulnerability.
Fixed in 5.4.0-1056.59
Upgrade
Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.
Fixed in 5.4.0-1139.148
Upgrade
Upgrade ubuntu/linux-lowlatency-hwe-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-156.166~20.04.1
Upgrade
Upgrade ubuntu/linux-nvidia-tegra-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1045.45~20.04.1
Upgrade
Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.
Fixed in 5.4.0-1150.160
Upgrade
Upgrade ubuntu/linux-oracle-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1090.96~20.04.1
Upgrade
Upgrade ubuntu/linux-raspi to a version that resolves this vulnerability.
Fixed in 5.4.0-1135.148
Upgrade
Upgrade ubuntu/linux-riscv-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1087.91~20.04.1
Upgrade
Upgrade ubuntu/linux-xilinx-zynqmp to a version that resolves this vulnerability.
Fixed in 5.4.0-1070.74
Upgrade
Upgrade ubuntu/linux-aws-fips to a version that resolves this vulnerability.
Fixed in 5.4.0-1152.162+fips1
Upgrade
Upgrade ubuntu/linux-azure-fips to a version that resolves this vulnerability.
Fixed in 5.4.0-1157.164+fips1
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Fixed in 5.4.0-1126.136
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Fixed in 5.4.0-1155.164+fips1
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Fixed in 5.15.0-156.166
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Fixed in 5.15.0-1092.99
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Fixed in 6.8.0-1042.44~22.04.1
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Fixed in 5.15.0-1096.105
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Fixed in 6.8.0-1044.50~22.04.1
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Fixed in 5.15.0-1096.105.1
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Fixed in 6.8.0-1046.53~22.04.1
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Fixed in 5.15.0-1092.101
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Fixed in 6.8.0-1043.46~22.04.1
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Fixed in 5.15.0-1089.95
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Fixed in 5.15.0-1075.83
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Fixed in 6.8.0-87.88~22.04.1
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Fixed in 5.15.0-1086.89
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Fixed in 6.8.0-1040.40~22.04.1
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Fixed in 5.15.0-1087.93
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Fixed in 5.15.0-1088.93
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Fixed in 5.15.0-156.166
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Fixed in 6.8.0-87.88.1~22.04.1
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Fixed in 5.15.0-1087.88
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Fixed in 6.8.0-1042.45~22.04.1
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Fixed in 5.15.0-1045.45
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Fixed in 5.15.0-1034.34
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Fixed in 5.15.0-1090.96
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Fixed in 6.8.0-1039.40~22.04.1
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Fixed in 5.15.0-1086.89
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Fixed in 6.8.0-87.88~22.04.1
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Fixed in 5.15.0-1056.60
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Fixed in 5.15.0-1076.78
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Fixed in 5.15.0-1085.87
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Fixed in 5.15.0-1092.101
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Fixed in 6.8.1-1037.38~22.04.1
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Fixed in 5.15.0-1092.99+fips1
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Fixed in 5.15.0-1096.105+fips1
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Fixed in 5.15.0-156.166+fips1
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Fixed in 5.15.0-1092.101+fips1
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Fixed in 6.8.0-87.88
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Fixed in 6.8.0-1042.44
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Fixed in 6.14.0-1013.13~24.04.1
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Fixed in 6.8.0-1044.50
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Fixed in 6.8.0-1046.53
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Fixed in 6.8.0-1029.32
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Fixed in 6.14.0-1007.7
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Fixed in 6.8.0-1043.46
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Fixed in 6.14.0-1016.17~24.04.1
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Fixed in 6.8.0-1039.44
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Fixed in 6.8.0-1026.29
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Fixed in 6.8.0-1040.40
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Fixed in 6.8.0-87.88.1
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Fixed in 6.8.0-1042.45
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Fixed in 6.11.0-1016.16
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Fixed in 6.8.0-1042.45.1
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Fixed in 6.8.0-1012.12
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Fixed in 6.14.0-1012.12
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Fixed in 6.8.0-1039.40
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Fixed in 6.14.0-1013.13~24.04.1
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Fixed in 6.8.0-1042.46
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Fixed in 6.14.0-32.32.1~24.04.1
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Fixed in 6.8.0-1019.20
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Fixed in 6.8.0-1013.17
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Fixed in 6.8.0-2033.34
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Fixed in 6.8.1-1037.38
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Fixed in 6.14.0-1012.12~24.04.1
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Fixed in 6.8.0-1042.44+fips1
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Fixed in 6.8.0-1044.50+fips1
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Fixed in 6.8.0-87.88+fips1
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Fixed in 6.8.0-1043.46+fips1
Configuration
Add the tsk->exit_state check to run_posix_cpu_timers() before calling task_work_add(&tsk->posix_cputimers_work.work). This fix is not needed when CONFIG_POSIX_CPU_TIMERS_TASK_WORK=y.
Linux kernel run_posix_cpu_timers() = check tsk->exit_state before task_work_add(&tsk->posix_cputimers_work.work)

Event History

Jul 22, 2025

CVE Published

via OSV·08:15 AM

Data Sourced

via OSV·08:15 AM

DescriptionSeverityAffected Software

Frequently Asked Questions

Which Ubuntu kernel packages are listed as affected?

The listed packages are ubuntu/linux, ubuntu/linux-aws, ubuntu/linux-azure, ubuntu/linux-gcp, ubuntu/linux-fips, ubuntu/linux-aws-fips, ubuntu/linux-azure-fips, and ubuntu/linux-gcp-fips.

What runtime condition is involved in triggering the race?

The race involves an exiting non-autoreaping task that has passed exit_notify() and runs handle_posix_cpu_timers() from an IRQ while posix_cpu_timer_del() executes concurrently. The task may be reaped by its parent or debugger after unlock_task_sighand(), preventing the deletion path from detecting that the CPU timer is firing.

Does the configuration CONFIG_POSIX_CPU_TIMERS_TASK_WORK affect exposure?

The described fix is not needed when CONFIG_POSIX_CPU_TIMERS_TASK_WORK=y, because exit_task_work() runs before exit_notify(). The added exit-state check is still considered sensible because task_work_add() would fail in the relevant exiting-task case.

UBUNTU-CVE-2025-38352: High severity ubuntu/linux vulnerability

Affected Software

Remediation

Event History

Frequently Asked Questions

Which Ubuntu kernel packages are listed as affected?

What runtime condition is involved in triggering the race?

Does the configuration CONFIG_POSIX_CPU_TIMERS_TASK_WORK affect exposure?

Company

Resources

Contact

Frequently Asked Questions

Which Ubuntu kernel packages are listed as affected?

What runtime condition is involved in triggering the race?

Does the configuration CONFIG_POSIX_CPU_TIMERS_TASK_WORK affect exposure?