CVE-2023-23455: High severity IBM Security Verify Governance, Identity Manager software component vulnerability
A denial of service flaw was found in atmtcenqueue in net/sched/schatm.c in the Linux kernel. In this flaw a local attacker may cause a denial of service because of type confusion (non-negative numbers can sometimes indicate a TCACTSHOT condition rather than valid classification results).
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a2965c7be0522eaa18808684b7b82b248515511b
Other sources
atmtcenqueue in net/sched/schatm.c in the Linux kernel through 6.1.4 allows attackers to cause a denial of service because of type confusion (non-negative numbers can sometimes indicate a TCACTSHOT condition rather than valid classification results).
— Ubuntu
Linux Kernel is vulnerable to a denial of service, caused by a type confusion flaw in the atmtcenqueue function in net/sched/schatm.c. By sending a specially-crafted request, a local attacker could exploit this vulnerability to cause a denial of service condition.
— IBM
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
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redhat/kernelto a version that resolves this vulnerability.Fixed in 6.2 - Upgrade
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ubuntu/linux-awsto a version that resolves this vulnerability.Fixed in 4.4.0-1117.123 - Upgrade
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ubuntu/linux-azureto a version that resolves this vulnerability.Fixed in 4.15.0-1162.177~14.04.1 - Upgrade
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ubuntu/linux-lts-xenialto a version that resolves this vulnerability.Fixed in 4.4.0-239.273~14.04.1 - Upgrade
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ubuntu/linuxto a version that resolves this vulnerability.Fixed in 4.4.0-239.273 - Upgrade
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ubuntu/linux-awsto a version that resolves this vulnerability.Fixed in 4.4.0-1155.170 - Upgrade
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ubuntu/linux-aws-hweto a version that resolves this vulnerability.Fixed in 4.15.0-1153.166~16.04.1 - Upgrade
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ubuntu/linux-azureto a version that resolves this vulnerability.Fixed in 4.15.0-1162.177~16.04.1 - Upgrade
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ubuntu/linux-gcpto a version that resolves this vulnerability.Fixed in 4.15.0-1147.163~16.04.1 - Upgrade
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ubuntu/linux-hweto a version that resolves this vulnerability.Fixed in 4.15.0-208.219~16.04.1 - Upgrade
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ubuntu/linux-kvmto a version that resolves this vulnerability.Fixed in 4.4.0-1118.128 - Upgrade
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ubuntu/linux-oracleto a version that resolves this vulnerability.Fixed in 4.15.0-1116.127~16.04.1 - Upgrade
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ubuntu/linux-fipsto a version that resolves this vulnerability.Fixed in 4.4.0-1088.95 - Upgrade
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ubuntu/linuxto a version that resolves this vulnerability.Fixed in 4.15.0-208.220 - Upgrade
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ubuntu/linux-awsto a version that resolves this vulnerability.Fixed in 4.15.0-1153.166 - Upgrade
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ubuntu/linux-aws-5.4to a version that resolves this vulnerability.Fixed in 5.4.0-1097.105~18.04.1 - Upgrade
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ubuntu/linux-azure-4.15to a version that resolves this vulnerability.Fixed in 4.15.0-1162.177 - Upgrade
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ubuntu/linux-azure-5.4to a version that resolves this vulnerability.Fixed in 5.4.0-1104.110~18.04.1 - Upgrade
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ubuntu/linux-dell300xto a version that resolves this vulnerability.Fixed in 4.15.0-1062.67 - Upgrade
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ubuntu/linux-gcp-4.15to a version that resolves this vulnerability.Fixed in 4.15.0-1147.163 - Upgrade
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ubuntu/linux-gcp-5.4to a version that resolves this vulnerability.Fixed in 5.4.0-1101.110~18.04.1 - Upgrade
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ubuntu/linux-hwe-5.4to a version that resolves this vulnerability.Fixed in 5.4.0-144.161~18.04.1 - Upgrade
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ubuntu/linux-ibm-5.4to a version that resolves this vulnerability.Fixed in 5.4.0-1045.50~18.04.1 - Upgrade
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ubuntu/linux-kvmto a version that resolves this vulnerability.Fixed in 4.15.0-1137.142 - Upgrade
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ubuntu/linux-oracleto a version that resolves this vulnerability.Fixed in 4.15.0-1116.127 - Upgrade
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ubuntu/linux-oracle-5.4to a version that resolves this vulnerability.Fixed in 5.4.0-1094.103~18.04.1 - Upgrade
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ubuntu/linux-raspi-5.4to a version that resolves this vulnerability.Fixed in 5.4.0-1081.92~18.04.1 - Upgrade
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ubuntu/linux-raspi2to a version that resolves this vulnerability.Fixed in 4.15.0-1129.137 - Upgrade
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ubuntu/linux-snapdragonto a version that resolves this vulnerability.Fixed in 4.15.0-1148.158 - Upgrade
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ubuntu/linux-aws-fipsto a version that resolves this vulnerability.Fixed in 4.15.0-2092.98 - Upgrade
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ubuntu/linux-azure-fipsto a version that resolves this vulnerability.Fixed in 4.15.0-2071.77 - Upgrade
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ubuntu/linux-fipsto a version that resolves this vulnerability.Fixed in 4.15.0-1108.119 - Upgrade
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ubuntu/linux-gcp-fipsto a version that resolves this vulnerability.Fixed in 4.15.0-2055.60 - Upgrade
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ubuntu/linuxto a version that resolves this vulnerability.Fixed in 5.4.0-144.161 - Upgrade
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ubuntu/linux-awsto a version that resolves this vulnerability.Fixed in 5.4.0-1097.105 - Upgrade
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ubuntu/linux-aws-5.15to a version that resolves this vulnerability.Fixed in 5.15.0-1033.37~20.04.1 - Upgrade
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ubuntu/linux-azureto a version that resolves this vulnerability.Fixed in 5.4.0-1104.110 - Upgrade
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ubuntu/linux-azure-5.15to a version that resolves this vulnerability.Fixed in 5.15.0-1035.42~20.04.1 - Upgrade
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ubuntu/linux-bluefieldto a version that resolves this vulnerability.Fixed in 5.4.0-1059.65 - Upgrade
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ubuntu/linux-gcpto a version that resolves this vulnerability.Fixed in 5.4.0-1101.110 - Upgrade
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ubuntu/linux-gcp-5.15to a version that resolves this vulnerability.Fixed in 5.15.0-1031.38~20.04.1 - Upgrade
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ubuntu/linux-gketo a version that resolves this vulnerability.Fixed in 5.4.0-1095.102 - Upgrade
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ubuntu/linux-gke-5.15to a version that resolves this vulnerability.Fixed in 5.15.0-1029.34~20.04.1 - Upgrade
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ubuntu/linux-gkeopto a version that resolves this vulnerability.Fixed in 5.4.0-1065.69 - Upgrade
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ubuntu/linux-gkeop-5.15to a version that resolves this vulnerability.Fixed in 5.15.0-1017.22~20.04.1 - Upgrade
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ubuntu/linux-hwe-5.15to a version that resolves this vulnerability.Fixed in 5.15.0-69.76~20.04.1 - Upgrade
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ubuntu/linux-ibmto a version that resolves this vulnerability.Fixed in 5.4.0-1045.50 - Upgrade
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ubuntu/linux-intel-iotg-5.15to a version that resolves this vulnerability.Fixed in 5.15.0-1027.32~20.04.1 - Upgrade
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ubuntu/linux-iotto a version that resolves this vulnerability.Fixed in 5.4.0-1013.15 - Upgrade
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ubuntu/linux-kvmto a version that resolves this vulnerability.Fixed in 5.4.0-1087.93 - Upgrade
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ubuntu/linux-lowlatency-hwe-5.15to a version that resolves this vulnerability.Fixed in 5.15.0-69.76~20.04.1 - Upgrade
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ubuntu/linux-nvidia-tegra-5.15to a version that resolves this vulnerability.Fixed in 5.15.0-1014.14~20.04.1 - Upgrade
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ubuntu/linux-oracleto a version that resolves this vulnerability.Fixed in 5.4.0-1094.103 - Upgrade
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ubuntu/linux-oracle-5.15to a version that resolves this vulnerability.Fixed in 5.15.0-1032.38~20.04.1 - Upgrade
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ubuntu/linux-raspito a version that resolves this vulnerability.Fixed in 5.4.0-1081.92 - Upgrade
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ubuntu/linux-riscv-5.15to a version that resolves this vulnerability.Fixed in 5.15.0-1030.34~20.04.1 - Upgrade
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ubuntu/linux-xilinx-zynqmpto a version that resolves this vulnerability.Fixed in 5.4.0-1022.26 - Upgrade
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ubuntu/linux-aws-fipsto a version that resolves this vulnerability.Fixed in 5.4.0-1099.107+fips1 - Upgrade
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ubuntu/linux-azure-fipsto a version that resolves this vulnerability.Fixed in 5.4.0-1104.110+fips1 - Upgrade
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ubuntu/linux-fipsto a version that resolves this vulnerability.Fixed in 5.4.0-1073.82 - Upgrade
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ubuntu/linux-gcp-fipsto a version that resolves this vulnerability.Fixed in 5.4.0-1101.110+fips1 - Upgrade
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ubuntu/linuxto a version that resolves this vulnerability.Fixed in 5.15.0-69.76 - Upgrade
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ubuntu/linux-awsto a version that resolves this vulnerability.Fixed in 5.15.0-1033.37 - Upgrade
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ubuntu/linux-azureto a version that resolves this vulnerability.Fixed in 5.15.0-1035.42 - Upgrade
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ubuntu/linux-azure-5.19to a version that resolves this vulnerability.Fixed in 5.19.0-1026.29~22.04.1 - Upgrade
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ubuntu/linux-azure-fdeto a version that resolves this vulnerability.Fixed in 5.15.0-1035.42.1 - Upgrade
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ubuntu/linux-gcpto a version that resolves this vulnerability.Fixed in 5.15.0-1031.38 - Upgrade
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ubuntu/linux-gketo a version that resolves this vulnerability.Fixed in 5.15.0-1030.35 - Upgrade
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ubuntu/linux-gkeopto a version that resolves this vulnerability.Fixed in 5.15.0-1017.22 - Upgrade
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ubuntu/linux-hwe-5.19to a version that resolves this vulnerability.Fixed in 5.19.0-42.43~22.04.1 - Upgrade
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ubuntu/linux-ibmto a version that resolves this vulnerability.Fixed in 5.15.0-1027.30 - Upgrade
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ubuntu/linux-intel-iotgto a version that resolves this vulnerability.Fixed in 5.15.0-1027.32 - Upgrade
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ubuntu/linux-kvmto a version that resolves this vulnerability.Fixed in 5.15.0-1030.35 - Upgrade
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ubuntu/linux-lowlatencyto a version that resolves this vulnerability.Fixed in 5.15.0-69.76 - Upgrade
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ubuntu/linux-lowlatency-hwe-5.19to a version that resolves this vulnerability.Fixed in 5.19.0-1024.25~22.04.1 - Upgrade
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ubuntu/linux-nvidiato a version that resolves this vulnerability.Fixed in 5.15.0-1023.23 - Upgrade
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ubuntu/linux-oem-5.17to a version that resolves this vulnerability.Fixed in 5.17.0-1031.32 - Upgrade
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ubuntu/linux-oem-6.0to a version that resolves this vulnerability.Fixed in 6.0.0-1015.15 - Upgrade
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ubuntu/linux-oem-6.1to a version that resolves this vulnerability.Fixed in 6.1.0-1007.7 - Upgrade
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ubuntu/linux-oracleto a version that resolves this vulnerability.Fixed in 5.15.0-1032.38 - Upgrade
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ubuntu/linux-raspito a version that resolves this vulnerability.Fixed in 5.15.0-1026.28 - Upgrade
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ubuntu/linux-bluefieldto a version that resolves this vulnerability.Fixed in 5.15.0-1015.17 - Upgrade
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ubuntu/linux-intel-iot-realtimeto a version that resolves this vulnerability.Fixed in 5.15.0-1023.28 - Upgrade
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ubuntu/linux-realtimeto a version that resolves this vulnerability.Fixed in 5.15.0-1034.37 - Upgrade
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debian/linuxto a version that resolves this vulnerability.Fixed in 6.1.176-1Fixed in 6.1.190-1Fixed in 6.12.107-1Fixed in 6.12.115-2Fixed in 7.2.15-1Fixed in 7.3.3-1
Event History
Frequently Asked Questions
What is the severity of CVE-2023-23455?
CVE-2023-23455 is classified as a denial of service vulnerability in the Linux kernel.
How do I fix CVE-2023-23455?
To fix CVE-2023-23455, update the Linux kernel to version 6.2 or above.
What software is affected by CVE-2023-23455?
CVE-2023-23455 affects various versions of the Linux kernel, IBM Security Verify Governance, and Identity Manager software components.
Can CVE-2023-23455 be exploited locally?
Yes, CVE-2023-23455 can be exploited by a local attacker, potentially leading to a denial of service.
What specific Linux kernel versions contain CVE-2023-23455?
CVE-2023-23455 impacts Linux kernel versions from 2.6.12 up to 6.1.4.