CVE-2025-71102: scs: fix a wrong parameter in __scs_magic

Q: What is the severity of CVE-2025-71102?

The severity of CVE-2025-71102 is classified as medium due to potential impacts on system stability.

Q: How do I fix CVE-2025-71102?

To fix CVE-2025-71102, update to the latest version of the Linux kernel where the vulnerability has been patched.

Q: What systems are affected by CVE-2025-71102?

CVE-2025-71102 affects various versions of the Linux kernel, particularly those that utilize the __scs_magic function.

Q: What are the potential consequences of CVE-2025-71102?

The potential consequences of CVE-2025-71102 include system crashes and unstable behavior due to incorrect parameter handling.

Q: Is CVE-2025-71102 exploitable remotely?

CVE-2025-71102 is not directly exploitable remotely, as it requires access to the system to trigger the vulnerability.

Published Jan 14, 2026

Updated

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

scs: fix a wrong parameter in scsmagic

scsmagic() needs a 'void ' variable, but a 'struct taskstruct ' is given. 'taskscs(tsk)' is the starting address of the task's shadow call stack, and 'scsmagic(taskscs(tsk))' is the end address of the task's shadow call stack. Here should be 'scsmagic(taskscs(tsk))'.

The user-visible effect of this bug is that when CONFIGDEBUGSTACKUSAGE is enabled, the shadow call stack usage checking function (scscheckusage) would scan an incorrect memory range. This could lead

1. Inaccurate stack usage reporting: The function would calculate wrong usage statistics for the shadow call stack, potentially showing incorrect value in kmsg.

2. Potential kernel crash: If the value of scsmagic(tsk)is greater than that of scsmagic(taskscs(tsk)), the for loop may access unmapped memory, potentially causing a kernel panic. However, this scenario is unlikely because taskstruct is allocated via the slab allocator (which typically returns lower addresses), while the shadow call stack returned by taskscs(tsk) is allocated via vmalloc(which typically returns higher addresses).

However, since this is purely a debugging feature (CONFIGDEBUGSTACKUSAGE), normal production systems should be not unaffected. The bug only impacts developers and testers who are actively debugging stack usage with this configuration enabled.

Affected Software

205 affected componentsFixes available

Linux Linux kernel

Linux Linux kernel>=5.8.1<5.10.248

Linux Linux kernel>=5.11<5.15.198

Linux Linux kernel>=5.16<6.1.160

Linux Linux kernel>=6.2<6.6.120

Linux Linux kernel>=6.7<6.12.64

Linux Linux kernel>=6.13<6.18.3

Linux Linux kernel=5.8

Linux Linux kernel=6.19-rc1

Linux Linux kernel=6.19-rc2

Linux Linux kernel=6.19-rc3

Linux Linux kernel=6.19-rc4

Linux Linux kernel=6.19-rc5

Linux Linux kernel=6.19-rc6

Linux Linux kernel=6.19-rc7

Linux Linux kernel=6.19-rc8

ubuntu/linux-hwe-edge*

ubuntu/linux-aws-5.0*

ubuntu/linux-aws-5.3*

ubuntu/linux-azure*

ubuntu/linux-azure-5.3*

ubuntu/linux-azure-edge*

ubuntu/linux-gcp*

ubuntu/linux-gcp-5.3*

ubuntu/linux-gke-4.15*

ubuntu/linux-gke-5.4*

ubuntu/linux-gkeop-5.4*

ubuntu/linux-hwe*

ubuntu/linux-hwe-edge*

ubuntu/linux-oem*

ubuntu/linux-oracle-5.0*

ubuntu/linux-oracle-5.3*

ubuntu/linux-aws-5.11*

ubuntu/linux-aws-5.13*

ubuntu/linux-aws-5.15<5.15.0-1103.110~20.04.1

5.15.0-1103.110~20.04.1

ubuntu/linux-aws-5.8*

ubuntu/linux-azure-5.11*

ubuntu/linux-azure-5.13*

ubuntu/linux-azure-5.15<5.15.0-1110.119~20.04.1

5.15.0-1110.119~20.04.1

ubuntu/linux-azure-5.8*

ubuntu/linux-azure-fde*

ubuntu/linux-gcp-5.11*

ubuntu/linux-gcp-5.13*

ubuntu/linux-gcp-5.15<5.15.0-1103.112~20.04.1

5.15.0-1103.112~20.04.1

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<5.15.0-173.183~20.04.1

5.15.0-173.183~20.04.1

ubuntu/linux-hwe-5.8*

ubuntu/linux-ibm-5.15<5.15.0-1097.100~20.04.1

5.15.0-1097.100~20.04.1

ubuntu/linux-intel-5.13*

ubuntu/linux-intel-iotg-5.15<5.15.0-1098.104~20.04.1

5.15.0-1098.104~20.04.1

ubuntu/linux-lowlatency-hwe-5.15<5.15.0-173.183~20.04.1

5.15.0-173.183~20.04.1

ubuntu/linux-nvidia-tegra-5.15<5.15.0-1055.55~20.04.1

5.15.0-1055.55~20.04.1

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-5.15<5.15.0-1100.106~20.04.1

5.15.0-1100.106~20.04.1

ubuntu/linux-oracle-5.8*

ubuntu/linux-raspi2*

ubuntu/linux-riscv*

ubuntu/linux-riscv-5.11*

ubuntu/linux-riscv-5.15<5.15.0-1097.101~20.04.1

5.15.0-1097.101~20.04.1

ubuntu/linux-riscv-5.8*

ubuntu/linux<5.15.0-173.183

5.15.0-173.183

ubuntu/linux-allwinner-5.19*

ubuntu/linux-aws<5.15.0-1103.110

5.15.0-1103.110

ubuntu/linux-aws-5.19*

ubuntu/linux-aws-6.2*

ubuntu/linux-aws-6.5*

ubuntu/linux-aws-6.8<6.8.0-1052.55~22.04.1

6.8.0-1052.55~22.04.1

ubuntu/linux-azure<5.15.0-1109.118

5.15.0-1109.118

ubuntu/linux-azure-5.19*

ubuntu/linux-azure-6.2*

ubuntu/linux-azure-6.5*

ubuntu/linux-azure-6.8<6.8.0-1059.65~22.04.1

6.8.0-1059.65~22.04.1

ubuntu/linux-azure-fde<5.15.0-1109.118.1

5.15.0-1109.118.1

ubuntu/linux-azure-fde-5.19*

ubuntu/linux-azure-fde-6.2*

ubuntu/linux-azure-fde-6.8<6.8.0-1058.65~22.04.1

6.8.0-1058.65~22.04.1

ubuntu/linux-gcp<5.15.0-1103.112

5.15.0-1103.112

ubuntu/linux-gcp-5.19*

ubuntu/linux-gcp-6.2*

ubuntu/linux-gcp-6.5*

ubuntu/linux-gcp-6.8<6.8.0-1054.57~22.04.1

6.8.0-1054.57~22.04.1

ubuntu/linux-gke<5.15.0-1099.105

5.15.0-1099.105

ubuntu/linux-gkeop<5.15.0-1086.94

5.15.0-1086.94

ubuntu/linux-hwe-5.19*

ubuntu/linux-hwe-6.2*

ubuntu/linux-hwe-6.5*

ubuntu/linux-hwe-6.8<6.8.0-110.110~22.04.1

6.8.0-110.110~22.04.1

ubuntu/linux-ibm<5.15.0-1097.100

5.15.0-1097.100

ubuntu/linux-ibm-6.8<6.8.0-1051.51~22.04.1

6.8.0-1051.51~22.04.1

ubuntu/linux-intel-iot-realtime*

ubuntu/linux-intel-iotg<5.15.0-1098.104

5.15.0-1098.104

ubuntu/linux-kvm<5.15.0-1095.100

5.15.0-1095.100

ubuntu/linux-lowlatency<5.15.0-173.183

5.15.0-173.183

ubuntu/linux-lowlatency-hwe-5.19*

ubuntu/linux-lowlatency-hwe-6.2*

ubuntu/linux-lowlatency-hwe-6.5*

ubuntu/linux-lowlatency-hwe-6.8<6.8.0-110.110.1~22.04.1

6.8.0-110.110.1~22.04.1

ubuntu/linux-nvidia<5.15.0-1098.99

5.15.0-1098.99

ubuntu/linux-nvidia-6.2*

ubuntu/linux-nvidia-6.5*

ubuntu/linux-nvidia-6.8<6.8.0-1051.54~22.04.1

6.8.0-1051.54~22.04.1

ubuntu/linux-nvidia-tegra<5.15.0-1055.55

5.15.0-1055.55

ubuntu/linux-nvidia-tegra-igx<5.15.0-1044.44

5.15.0-1044.44

ubuntu/linux-oem-5.17*

ubuntu/linux-oem-6.0*

ubuntu/linux-oem-6.1*

ubuntu/linux-oem-6.5*

ubuntu/linux-oracle<5.15.0-1100.106

5.15.0-1100.106

ubuntu/linux-oracle-6.5*

ubuntu/linux-oracle-6.8<6.8.0-1049.50~22.04.1

6.8.0-1049.50~22.04.1

ubuntu/linux-raspi<5.15.0-1097.100

5.15.0-1097.100

ubuntu/linux-realtime*

ubuntu/linux-riscv*

ubuntu/linux-riscv-5.19*

ubuntu/linux-riscv-6.5*

ubuntu/linux-riscv-6.8<6.8.0-110.110~22.04.1

6.8.0-110.110~22.04.1

ubuntu/linux-starfive-5.19*

ubuntu/linux-starfive-6.2*

ubuntu/linux-starfive-6.5*

ubuntu/linux-xilinx-zynqmp<5.15.0-1067.71

5.15.0-1067.71

ubuntu/linux-bluefield<5.15.0-1086.88

5.15.0-1086.88

ubuntu/linux-intel-iot-realtime<5.15.0-1094.96

5.15.0-1094.96

ubuntu/linux-realtime<5.15.0-1102.111

5.15.0-1102.111

ubuntu/linux-realtime-6.8<6.8.1-1047.48~22.04.1

6.8.1-1047.48~22.04.1

ubuntu/linux-aws-fips*

ubuntu/linux-azure-fips*

ubuntu/linux-fips*

ubuntu/linux-gcp-fips*

ubuntu/linux-aws-fips<5.15.0-1103.110+fips1

5.15.0-1103.110+fips1

ubuntu/linux-azure-fips<5.15.0-1109.118+fips1

5.15.0-1109.118+fips1

ubuntu/linux-fips<5.15.0-173.183+fips1

5.15.0-173.183+fips1

ubuntu/linux-gcp-fips<5.15.0-1103.112+fips1

5.15.0-1103.112+fips1

ubuntu/linux<6.8.0-110.110

6.8.0-110.110

ubuntu/linux-aws<6.8.0-1052.55

6.8.0-1052.55

ubuntu/linux-aws-6.14*

ubuntu/linux-aws-6.17<6.17.0-1012.12~24.04.1

6.17.0-1012.12~24.04.1

ubuntu/linux-azure<6.8.0-1054.60

6.8.0-1054.60

ubuntu/linux-azure-6.11*

ubuntu/linux-azure-6.14*

ubuntu/linux-azure-6.17<6.17.0-1013.13~24.04.1

6.17.0-1013.13~24.04.1

ubuntu/linux-azure-fde<6.8.0-1058.65

6.8.0-1058.65

ubuntu/linux-azure-fde-6.14*

ubuntu/linux-azure-nvidia<6.8.0-1039.42

6.8.0-1039.42

ubuntu/linux-azure-nvidia-6.14*

ubuntu/linux-gcp<6.8.0-1054.57

6.8.0-1054.57

ubuntu/linux-gcp-6.11*

ubuntu/linux-gcp-6.14*

ubuntu/linux-gcp-6.17<6.17.0-1012.12~24.04.1

6.17.0-1012.12~24.04.1

ubuntu/linux-gke<6.8.0-1050.56

6.8.0-1050.56

ubuntu/linux-gkeop<6.8.0-1037.40

6.8.0-1037.40

ubuntu/linux-hwe-6.11*

ubuntu/linux-hwe-6.14*

ubuntu/linux-hwe-6.17<6.17.0-22.22~24.04.1

6.17.0-22.22~24.04.1

ubuntu/linux-ibm<6.8.0-1051.51

6.8.0-1051.51

ubuntu/linux-lowlatency<6.8.0-110.110.1

6.8.0-110.110.1

ubuntu/linux-lowlatency-hwe-6.11*

ubuntu/linux-nvidia<6.8.0-1051.54

6.8.0-1051.54

ubuntu/linux-nvidia-6.11*

ubuntu/linux-nvidia-6.17<6.17.0-1018.18

6.17.0-1018.18

ubuntu/linux-nvidia-lowlatency<6.8.0-1051.54.1

6.8.0-1051.54.1

ubuntu/linux-nvidia-tegra<6.8.0-1022.22

6.8.0-1022.22

ubuntu/linux-oem-6.11*

ubuntu/linux-oem-6.14*

ubuntu/linux-oem-6.17<6.17.0-1020.20

6.17.0-1020.20

ubuntu/linux-oem-6.8*

ubuntu/linux-oracle<6.8.0-1049.50

6.8.0-1049.50

ubuntu/linux-oracle-6.14*

ubuntu/linux-oracle-6.17<6.17.0-1011.11~24.04.1

6.17.0-1011.11~24.04.1

ubuntu/linux-raspi<6.8.0-1052.56

6.8.0-1052.56

ubuntu/linux-raspi-realtime*

ubuntu/linux-realtime*

ubuntu/linux-riscv*

ubuntu/linux-riscv-6.14*

ubuntu/linux-riscv-6.17<6.17.0-22.22.1~24.04.1

6.17.0-22.22.1~24.04.1

ubuntu/linux-xilinx<6.8.0-1028.29

6.8.0-1028.29

ubuntu/linux-bluefield<6.8.0-1017.21

6.8.0-1017.21

ubuntu/linux-raspi-realtime<6.8.0-2042.43

6.8.0-2042.43

ubuntu/linux-realtime<6.8.1-1047.48

6.8.1-1047.48

ubuntu/linux-realtime-6.14*

ubuntu/linux-realtime-6.17<6.17.0-1010.11~24.04.1

6.17.0-1010.11~24.04.1

ubuntu/linux-aws-fips<6.8.0-1052.55+fips1

6.8.0-1052.55+fips1

ubuntu/linux-azure-fips<6.8.0-1053.59+fips1

6.8.0-1053.59+fips1

ubuntu/linux-fips<6.8.0-110.110+fips2

6.8.0-110.110+fips2

ubuntu/linux-gcp-fips<6.8.0-1054.57+fips1

6.8.0-1054.57+fips1

ubuntu/linux<6.17.0-22.22

6.17.0-22.22

ubuntu/linux-aws<6.17.0-1012.12

6.17.0-1012.12

ubuntu/linux-azure<6.17.0-1013.13

6.17.0-1013.13

ubuntu/linux-azure-fde*

ubuntu/linux-gcp<6.17.0-1012.12

6.17.0-1012.12

ubuntu/linux-oracle<6.17.0-1011.11

6.17.0-1011.11

ubuntu/linux-raspi<6.17.0-1013.13

6.17.0-1013.13

ubuntu/linux-realtime<6.17.0-1010.11

6.17.0-1010.11

ubuntu/linux-riscv<6.17.0-22.22.1

6.17.0-22.22.1

ubuntu/linux-vmware*

debian/linux

6.1.176-16.1.190-16.12.107-16.12.116-17.2.15-17.3.4-1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade ubuntu/linux-aws-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1103.110~20.04.1
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Fixed in 5.15.0-1110.119~20.04.1
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Fixed in 5.15.0-1103.112~20.04.1
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Fixed in 5.15.0-173.183~20.04.1
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Fixed in 5.15.0-1097.100~20.04.1
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Fixed in 5.15.0-1098.104~20.04.1
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Fixed in 5.15.0-173.183~20.04.1
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Fixed in 5.15.0-1055.55~20.04.1
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Fixed in 5.15.0-1100.106~20.04.1
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Fixed in 5.15.0-1097.101~20.04.1
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Fixed in 5.15.0-173.183
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Fixed in 5.15.0-1103.110
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Fixed in 6.8.0-1052.55~22.04.1
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Fixed in 5.15.0-1109.118
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Fixed in 6.8.0-1059.65~22.04.1
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Fixed in 5.15.0-1109.118.1
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Fixed in 6.8.0-1058.65~22.04.1
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Fixed in 5.15.0-1103.112
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Fixed in 6.8.0-1054.57~22.04.1
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Fixed in 5.15.0-1099.105
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Fixed in 5.15.0-1086.94
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Fixed in 6.8.0-110.110~22.04.1
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Fixed in 5.15.0-1097.100
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Fixed in 6.8.0-1051.51~22.04.1
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Fixed in 5.15.0-1098.104
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Fixed in 5.15.0-1095.100
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Fixed in 5.15.0-173.183
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Fixed in 6.8.0-110.110.1~22.04.1
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Fixed in 5.15.0-1098.99
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Fixed in 6.8.0-1051.54~22.04.1
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Fixed in 5.15.0-1055.55
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Fixed in 5.15.0-1044.44
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Fixed in 5.15.0-1100.106
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Fixed in 6.8.0-1049.50~22.04.1
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Fixed in 5.15.0-1097.100
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Fixed in 6.8.0-110.110~22.04.1
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Fixed in 5.15.0-1067.71
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Fixed in 5.15.0-1086.88
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Fixed in 5.15.0-1094.96
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Fixed in 5.15.0-1102.111
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Fixed in 6.8.1-1047.48~22.04.1
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Fixed in 5.15.0-1103.110+fips1
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Fixed in 5.15.0-1109.118+fips1
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Fixed in 5.15.0-173.183+fips1
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Fixed in 5.15.0-1103.112+fips1
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Fixed in 6.8.0-110.110
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Fixed in 6.8.0-1052.55
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Fixed in 6.17.0-1012.12~24.04.1
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Fixed in 6.8.0-1054.60
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Fixed in 6.17.0-1013.13~24.04.1
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Fixed in 6.8.0-1058.65
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Fixed in 6.8.0-1039.42
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Fixed in 6.8.0-1054.57
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Fixed in 6.17.0-1012.12~24.04.1
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Fixed in 6.8.0-1050.56
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Fixed in 6.8.0-1037.40
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Fixed in 6.17.0-22.22~24.04.1
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Fixed in 6.8.0-1051.51
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Fixed in 6.8.0-110.110.1
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Fixed in 6.8.0-1051.54
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Fixed in 6.17.0-1018.18
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Fixed in 6.8.0-1051.54.1
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Fixed in 6.8.0-1022.22
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Fixed in 6.17.0-1020.20
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Fixed in 6.8.0-1049.50
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Fixed in 6.17.0-1011.11~24.04.1
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Fixed in 6.8.0-1052.56
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Fixed in 6.17.0-22.22.1~24.04.1
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Fixed in 6.8.0-1028.29
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Fixed in 6.8.0-1017.21
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Fixed in 6.8.0-2042.43
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Fixed in 6.8.1-1047.48
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Fixed in 6.17.0-1010.11~24.04.1
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Fixed in 6.8.0-1052.55+fips1
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Fixed in 6.8.0-1053.59+fips1
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Fixed in 6.8.0-110.110+fips2
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Fixed in 6.8.0-1054.57+fips1
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Fixed in 6.17.0-22.22
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Fixed in 6.17.0-1012.12
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Fixed in 6.17.0-1013.13
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Fixed in 6.17.0-1012.12
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Fixed in 6.17.0-1011.11
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Fixed in 6.17.0-1013.13
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Fixed in 6.17.0-1010.11
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Fixed in 6.17.0-22.22.1
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Fixed in 6.1.176-1Fixed in 6.1.190-1Fixed in 6.12.107-1Fixed in 6.12.116-1Fixed in 7.2.15-1Fixed in 7.3.4-1

Event History

Jan 14, 2026

CVE Published

via MITRE·03:05 PM

Data Sourced

via MITRE·03:05 PM

Description

Data Sourced

via OSV·03:15 PM

DescriptionSeverityAffected Software

Data Sourced

via NVD·03:15 PM

RemedyDescriptionSeverityAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

What is the severity of CVE-2025-71102?

The severity of CVE-2025-71102 is classified as medium due to potential impacts on system stability.

How do I fix CVE-2025-71102?

To fix CVE-2025-71102, update to the latest version of the Linux kernel where the vulnerability has been patched.

What systems are affected by CVE-2025-71102?

CVE-2025-71102 affects various versions of the Linux kernel, particularly those that utilize the __scs_magic function.

What are the potential consequences of CVE-2025-71102?

The potential consequences of CVE-2025-71102 include system crashes and unstable behavior due to incorrect parameter handling.

Is CVE-2025-71102 exploitable remotely?

CVE-2025-71102 is not directly exploitable remotely, as it requires access to the system to trigger the vulnerability.

CVE-2025-71102: scs: fix a wrong parameter in __scs_magic

Affected Software

Remediation

Event History

Parent advisories

Peer vulnerabilities

Frequently Asked Questions

What is the severity of CVE-2025-71102?

How do I fix CVE-2025-71102?

What systems are affected by CVE-2025-71102?

What are the potential consequences of CVE-2025-71102?

Is CVE-2025-71102 exploitable remotely?

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Resources

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