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CVE-2026-53295

Fixed in a distro release EPSS <1%

In the Linux kernel, the following vulnerability has been resolved: mailbox: add sanity check for channel array Fail gracefully if there is no channel array attached to the mailbox controller. Otherwise the later dereference will cause an OOPS which might not be seen because mailbox controllers might instantiate very early. Remove the comment explaining the obvious while here.

Published 2026-06-26 · CVE record · OSV

Products: Linux, Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP, Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP, Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP

Distro releases

ReleasePackageFixed in
Amazon Linux 2023bpftool1:6.1.175-219.357.amzn2023
Amazon Linux 2023bpftool6.121:6.12.92-122.166.amzn2023
Amazon Linux 2023bpftool6.181:6.18.33-63.124.amzn2023
Amazon Linux 2023kernel1:6.1.175-219.357.amzn2023
Amazon Linux 2023kernel-devel1:6.1.175-219.357.amzn2023
Amazon Linux 2023kernel-headers1:6.1.175-219.357.amzn2023
Amazon Linux 2023kernel-livepatch-6.1.175-219.3571:1.0-0.amzn2023
Amazon Linux 2023kernel-livepatch-6.12.92-122.1661:1.0-0.amzn2023
Amazon Linux 2023kernel-livepatch-6.18.33-63.1241:1.0-0.amzn2023
Amazon Linux 2023kernel-modules-extra1:6.1.175-219.357.amzn2023
Amazon Linux 2023kernel-modules-extra-common1:6.1.175-219.357.amzn2023
Amazon Linux 2023kernel-tools1:6.1.175-219.357.amzn2023
Amazon Linux 2023kernel-tools-devel1:6.1.175-219.357.amzn2023
Amazon Linux 2023kernel6.121:6.12.92-122.166.amzn2023
Amazon Linux 2023kernel6.12-devel1:6.12.92-122.166.amzn2023
Amazon Linux 2023kernel6.12-headers1:6.12.92-122.166.amzn2023
Amazon Linux 2023kernel6.12-modules-extra1:6.12.92-122.166.amzn2023
Amazon Linux 2023kernel6.12-modules-extra-common1:6.12.92-122.166.amzn2023
Amazon Linux 2023kernel6.12-tools1:6.12.92-122.166.amzn2023
Amazon Linux 2023kernel6.12-tools-devel1:6.12.92-122.166.amzn2023
Amazon Linux 2023kernel6.181:6.18.33-63.124.amzn2023
Amazon Linux 2023kernel6.18-devel1:6.18.33-63.124.amzn2023
Amazon Linux 2023kernel6.18-headers1:6.18.33-63.124.amzn2023
Amazon Linux 2023kernel6.18-modules-extra1:6.18.33-63.124.amzn2023
Amazon Linux 2023kernel6.18-modules-extra-common1:6.18.33-63.124.amzn2023
Amazon Linux 2023kernel6.18-tools1:6.18.33-63.124.amzn2023
Amazon Linux 2023kernel6.18-tools-devel1:6.18.33-63.124.amzn2023
Amazon Linux 2023perf1:6.1.175-219.357.amzn2023
Amazon Linux 2023perf6.121:6.12.92-122.166.amzn2023
Amazon Linux 2023perf6.181:6.18.33-63.124.amzn2023
Amazon Linux 2023python3-perf1:6.1.175-219.357.amzn2023
Amazon Linux 2023python3-perf6.121:6.12.92-122.166.amzn2023
Amazon Linux 2023python3-perf6.181:6.18.33-63.124.amzn2023
Debian 12linux6.1.176-1
Debian 13linux6.12.94-1
Debian 14linux7.0.10-1
Ubuntu 16.04 LTSlinux-hwe-edgeno fix
Ubuntu 18.04 LTSlinux-aws-5.0no fix
Ubuntu 18.04 LTSlinux-aws-5.3no fix
Ubuntu 18.04 LTSlinux-azureno fix
Ubuntu 18.04 LTSlinux-azure-5.3no fix
Ubuntu 18.04 LTSlinux-azure-edgeno fix
Ubuntu 18.04 LTSlinux-gcpno fix
Ubuntu 18.04 LTSlinux-gcp-5.3no fix
Ubuntu 18.04 LTSlinux-gke-4.15no fix
Ubuntu 18.04 LTSlinux-gke-5.4no fix
Ubuntu 18.04 LTSlinux-gkeop-5.4no fix
Ubuntu 18.04 LTSlinux-hweno fix
Ubuntu 18.04 LTSlinux-hwe-edgeno fix
Ubuntu 18.04 LTSlinux-oemno fix
Ubuntu 18.04 LTSlinux-oracle-5.0no fix
Ubuntu 18.04 LTSlinux-oracle-5.3no fix
Ubuntu 20.04 LTSlinux-aws-5.11no fix
Ubuntu 20.04 LTSlinux-aws-5.13no fix
Ubuntu 20.04 LTSlinux-aws-5.8no fix
Ubuntu 20.04 LTSlinux-azure-5.11no fix
Ubuntu 20.04 LTSlinux-azure-5.13no fix
Ubuntu 20.04 LTSlinux-azure-5.8no fix
Ubuntu 20.04 LTSlinux-azure-fdeno fix
Ubuntu 20.04 LTSlinux-gcp-5.11no fix
Ubuntu 20.04 LTSlinux-gcp-5.13no fix
Ubuntu 20.04 LTSlinux-gcp-5.8no fix
Ubuntu 20.04 LTSlinux-gkeno fix
Ubuntu 20.04 LTSlinux-gke-5.15no fix
Ubuntu 20.04 LTSlinux-gkeopno fix
Ubuntu 20.04 LTSlinux-gkeop-5.15no fix
Ubuntu 20.04 LTSlinux-hwe-5.11no fix
Ubuntu 20.04 LTSlinux-hwe-5.13no fix
Ubuntu 20.04 LTSlinux-hwe-5.8no fix
Ubuntu 20.04 LTSlinux-intel-5.13no fix
Ubuntu 20.04 LTSlinux-oem-5.10no fix
Ubuntu 20.04 LTSlinux-oem-5.13no fix
Ubuntu 20.04 LTSlinux-oem-5.14no fix
Ubuntu 20.04 LTSlinux-oem-5.6no fix
Ubuntu 20.04 LTSlinux-oracle-5.11no fix
Ubuntu 20.04 LTSlinux-oracle-5.13no fix
Ubuntu 20.04 LTSlinux-oracle-5.8no fix
Ubuntu 20.04 LTSlinux-raspi2no fix
Ubuntu 20.04 LTSlinux-riscvno fix
Ubuntu 20.04 LTSlinux-riscv-5.11no fix
Ubuntu 20.04 LTSlinux-riscv-5.8no fix
Ubuntu 22.04 LTSlinux5.15.0-186.196
Ubuntu 22.04 LTSlinux-allwinner-5.19no fix
Ubuntu 22.04 LTSlinux-aws5.15.0-1112.119
Ubuntu 22.04 LTSlinux-aws-5.19no fix
Ubuntu 22.04 LTSlinux-aws-6.2no fix
Ubuntu 22.04 LTSlinux-aws-6.5no fix
Ubuntu 22.04 LTSlinux-aws-6.86.8.0-1061.64~22.04.1
Ubuntu 22.04 LTSlinux-azure5.15.0-1117.126
Ubuntu 22.04 LTSlinux-azure-5.19no fix
Ubuntu 22.04 LTSlinux-azure-6.2no fix
Ubuntu 22.04 LTSlinux-azure-6.5no fix
Ubuntu 22.04 LTSlinux-azure-6.86.8.0-1063.71~22.04.1
Ubuntu 22.04 LTSlinux-azure-fde5.15.0-1117.126
Ubuntu 22.04 LTSlinux-azure-fde-5.19no fix
Ubuntu 22.04 LTSlinux-azure-fde-6.2no fix
Ubuntu 22.04 LTSlinux-azure-fde-6.86.8.0-1062.69~22.04.1
Ubuntu 22.04 LTSlinux-gcp5.15.0-1112.122
Ubuntu 22.04 LTSlinux-gcp-5.19no fix
Ubuntu 22.04 LTSlinux-gcp-6.2no fix
Ubuntu 22.04 LTSlinux-gcp-6.5no fix
Ubuntu 22.04 LTSlinux-gcp-6.86.8.0-1064.72~22.04.1
Ubuntu 22.04 LTSlinux-gke5.15.0-1108.114
Ubuntu 22.04 LTSlinux-gkeop5.15.0-1095.103
Ubuntu 22.04 LTSlinux-hwe-5.19no fix
Ubuntu 22.04 LTSlinux-hwe-6.2no fix
Ubuntu 22.04 LTSlinux-hwe-6.5no fix
Ubuntu 22.04 LTSlinux-hwe-6.86.8.0-136.136~22.04.1
Ubuntu 22.04 LTSlinux-ibm5.15.0-1106.110
Ubuntu 22.04 LTSlinux-ibm-6.86.8.0-1061.62~22.04.1
Ubuntu 22.04 LTSlinux-intel-iot-realtimeno fix
Ubuntu 22.04 LTSlinux-intel-iotg5.15.0-1107.113
Ubuntu 22.04 LTSlinux-kvm5.15.0-1104.109
Ubuntu 22.04 LTSlinux-lowlatency5.15.0-184.194
Ubuntu 22.04 LTSlinux-lowlatency-hwe-5.19no fix
Ubuntu 22.04 LTSlinux-lowlatency-hwe-6.2no fix
Ubuntu 22.04 LTSlinux-lowlatency-hwe-6.5no fix
Ubuntu 22.04 LTSlinux-lowlatency-hwe-6.86.8.0-136.136.2~22.04.1
Ubuntu 22.04 LTSlinux-nvidia5.15.0-1107.108
Ubuntu 22.04 LTSlinux-nvidia-6.2no fix
Ubuntu 22.04 LTSlinux-nvidia-6.5no fix
Ubuntu 22.04 LTSlinux-nvidia-6.86.8.0-1059.62~22.04.1
Ubuntu 22.04 LTSlinux-nvidia-tegra5.15.0-1064.66
Ubuntu 22.04 LTSlinux-nvidia-tegra-igx5.15.0-1053.53
Ubuntu 22.04 LTSlinux-oem-5.17no fix
Ubuntu 22.04 LTSlinux-oem-6.0no fix
Ubuntu 22.04 LTSlinux-oem-6.1no fix
Ubuntu 22.04 LTSlinux-oem-6.5no fix
Ubuntu 22.04 LTSlinux-oracle5.15.0-1109.115
Ubuntu 22.04 LTSlinux-oracle-6.5no fix
Ubuntu 22.04 LTSlinux-oracle-6.86.8.0-1058.61~22.04.1
Ubuntu 22.04 LTSlinux-raspi5.15.0-1106.109
Ubuntu 22.04 LTSlinux-realtimeno fix
Ubuntu 22.04 LTSlinux-riscvno fix
Ubuntu 22.04 LTSlinux-riscv-5.19no fix
Ubuntu 22.04 LTSlinux-riscv-6.5no fix
Ubuntu 22.04 LTSlinux-riscv-6.86.8.0-136.136~22.04.3
Ubuntu 22.04 LTSlinux-starfive-5.19no fix
Ubuntu 22.04 LTSlinux-starfive-6.2no fix
Ubuntu 22.04 LTSlinux-starfive-6.5no fix
Ubuntu 22.04 LTSlinux-xilinx-zynqmp5.15.0-1075.79
Ubuntu 24.04 LTSlinux6.8.0-136.136
Ubuntu 24.04 LTSlinux-aws6.8.0-1061.64
Ubuntu 24.04 LTSlinux-aws-6.14no fix
Ubuntu 24.04 LTSlinux-aws-6.17no fix
Ubuntu 24.04 LTSlinux-azure6.8.0-1063.71
Ubuntu 24.04 LTSlinux-azure-6.11no fix
Ubuntu 24.04 LTSlinux-azure-6.14no fix
Ubuntu 24.04 LTSlinux-azure-6.17no fix
Ubuntu 24.04 LTSlinux-azure-7.07.0.0-1014.14~24.04.1
Ubuntu 24.04 LTSlinux-azure-fde6.8.0-1062.69
Ubuntu 24.04 LTSlinux-azure-fde-6.14no fix
Ubuntu 24.04 LTSlinux-azure-fde-7.07.0.0-1013.13~24.04.1
Ubuntu 24.04 LTSlinux-azure-nvidiano fix
Ubuntu 24.04 LTSlinux-azure-nvidia-6.14no fix
Ubuntu 24.04 LTSlinux-gcp6.8.0-1064.72
Ubuntu 24.04 LTSlinux-gcp-6.11no fix
Ubuntu 24.04 LTSlinux-gcp-6.14no fix
Ubuntu 24.04 LTSlinux-gcp-6.17no fix
Ubuntu 24.04 LTSlinux-gcp-7.07.0.0-1011.11~24.04.1
Ubuntu 24.04 LTSlinux-gke6.8.0-1059.67
Ubuntu 24.04 LTSlinux-gkeop6.8.0-1046.50
Ubuntu 24.04 LTSlinux-hwe-6.11no fix
Ubuntu 24.04 LTSlinux-hwe-6.14no fix
Ubuntu 24.04 LTSlinux-hwe-6.17no fix
Ubuntu 24.04 LTSlinux-hwe-7.07.0.0-28.28~24.04.1
Ubuntu 24.04 LTSlinux-ibm6.8.0-1061.62
Ubuntu 24.04 LTSlinux-lowlatency6.8.0-136.136.2
Ubuntu 24.04 LTSlinux-lowlatency-hwe-6.11no fix
Ubuntu 24.04 LTSlinux-nvidia6.8.0-1059.62
Ubuntu 24.04 LTSlinux-nvidia-6.11no fix
Ubuntu 24.04 LTSlinux-nvidia-6.17no fix
Ubuntu 24.04 LTSlinux-nvidia-7.07.0.0-1016.16~24.04.1
Ubuntu 24.04 LTSlinux-nvidia-lowlatency6.8.0-1059.62.1
Ubuntu 24.04 LTSlinux-nvidia-tegra6.8.0-1030.31
Ubuntu 24.04 LTSlinux-oem-6.11no fix
Ubuntu 24.04 LTSlinux-oem-6.14no fix
Ubuntu 24.04 LTSlinux-oem-6.17no fix
Ubuntu 24.04 LTSlinux-oem-6.8no fix
Ubuntu 24.04 LTSlinux-oracle6.8.0-1058.61
Ubuntu 24.04 LTSlinux-oracle-6.14no fix
Ubuntu 24.04 LTSlinux-oracle-6.17no fix
Ubuntu 24.04 LTSlinux-oracle-7.07.0.0-1011.11~24.04.1
Ubuntu 24.04 LTSlinux-raspi6.8.0-1061.65
Ubuntu 24.04 LTSlinux-raspi-realtimeno fix
Ubuntu 24.04 LTSlinux-realtimeno fix
Ubuntu 24.04 LTSlinux-riscvno fix
Ubuntu 24.04 LTSlinux-riscv-6.14no fix
Ubuntu 24.04 LTSlinux-riscv-6.17no fix
Ubuntu 24.04 LTSlinux-riscv-7.07.0.0-28.28.1~24.04.3
Ubuntu 24.04 LTSlinux-xilinx6.8.0-1033.34
Ubuntu 25.10linuxno fix
Ubuntu 25.10linux-awsno fix
Ubuntu 25.10linux-azureno fix
Ubuntu 25.10linux-azure-fdeno fix
Ubuntu 25.10linux-gcpno fix
Ubuntu 25.10linux-oracleno fix
Ubuntu 25.10linux-raspino fix
Ubuntu 25.10linux-realtimeno fix
Ubuntu 25.10linux-riscvno fix
Ubuntu 26.04 LTSlinux7.0.0-28.28
Ubuntu 26.04 LTSlinux-aws7.0.0-1009.9
Ubuntu 26.04 LTSlinux-azure7.0.0-1010.10
Ubuntu 26.04 LTSlinux-azure-fde7.0.0-1009.9
Ubuntu 26.04 LTSlinux-gcp7.0.0-1008.8
Ubuntu 26.04 LTSlinux-gke7.0.0-1003.4
Ubuntu 26.04 LTSlinux-ibm7.0.0-1010.10
Ubuntu 26.04 LTSlinux-nvidia7.0.0-1016.16
Ubuntu 26.04 LTSlinux-nvidia-bos7.0.0-2016.16
Ubuntu 26.04 LTSlinux-oem-7.07.0.0-1009.9
Ubuntu 26.04 LTSlinux-oracle7.0.0-1008.8
Ubuntu 26.04 LTSlinux-raspi7.0.0-1015.15
Ubuntu 26.04 LTSlinux-realtime7.0.0-28.28.1
Ubuntu 26.04 LTSlinux-riscv7.0.0-28.28.1
Ubuntu Nvidia-BlueField 22.04 LTSlinux-bluefield5.15.0-1096.98
Ubuntu Nvidia-BlueField 24.04 LTSlinux-bluefield6.8.0-1028.33
Ubuntu Pro 14.04 LTSlinux-awsno fix
Ubuntu Pro 14.04 LTSlinux-azureno fix
Ubuntu Pro 14.04 LTSlinux-lts-xenialno fix
Ubuntu Pro 16.04 LTSlinuxno fix
Ubuntu Pro 16.04 LTSlinux-awsno fix
Ubuntu Pro 16.04 LTSlinux-aws-hweno fix
Ubuntu Pro 16.04 LTSlinux-azureno fix
Ubuntu Pro 16.04 LTSlinux-gcpno fix
Ubuntu Pro 16.04 LTSlinux-hweno fix
Ubuntu Pro 16.04 LTSlinux-kvmno fix
Ubuntu Pro 16.04 LTSlinux-oracleno fix
Ubuntu Pro 18.04 LTSlinuxno fix
Ubuntu Pro 18.04 LTSlinux-awsno fix
Ubuntu Pro 18.04 LTSlinux-aws-5.4no fix
Ubuntu Pro 18.04 LTSlinux-azure-4.15no fix
Ubuntu Pro 18.04 LTSlinux-azure-5.4no fix
Ubuntu Pro 18.04 LTSlinux-gcp-4.15no fix
Ubuntu Pro 18.04 LTSlinux-gcp-5.4no fix
Ubuntu Pro 18.04 LTSlinux-hwe-5.4no fix
Ubuntu Pro 18.04 LTSlinux-ibm-5.4no fix
Ubuntu Pro 18.04 LTSlinux-kvmno fix
Ubuntu Pro 18.04 LTSlinux-oracleno fix
Ubuntu Pro 18.04 LTSlinux-oracle-5.4no fix
Ubuntu Pro 18.04 LTSlinux-raspi-5.4no fix
Ubuntu Pro 20.04 LTSlinuxno fix
Ubuntu Pro 20.04 LTSlinux-awsno fix
Ubuntu Pro 20.04 LTSlinux-aws-5.155.15.0-1112.119~20.04.1
Ubuntu Pro 20.04 LTSlinux-azureno fix
Ubuntu Pro 20.04 LTSlinux-azure-5.155.15.0-1117.126~20.04.1
Ubuntu Pro 20.04 LTSlinux-azure-fde-5.155.15.0-1117.126~20.04.2
Ubuntu Pro 20.04 LTSlinux-bluefieldno fix
Ubuntu Pro 20.04 LTSlinux-gcpno fix
Ubuntu Pro 20.04 LTSlinux-gcp-5.155.15.0-1112.122~20.04.1
Ubuntu Pro 20.04 LTSlinux-hwe-5.155.15.0-186.196~20.04.1
Ubuntu Pro 20.04 LTSlinux-ibmno fix
Ubuntu Pro 20.04 LTSlinux-ibm-5.155.15.0-1106.110~20.04.1
Ubuntu Pro 20.04 LTSlinux-intel-iotg-5.155.15.0-1107.113~20.04.1
Ubuntu Pro 20.04 LTSlinux-iotno fix
Ubuntu Pro 20.04 LTSlinux-kvmno fix
Ubuntu Pro 20.04 LTSlinux-lowlatency-hwe-5.155.15.0-184.194~20.04.1
Ubuntu Pro 20.04 LTSlinux-nvidia-tegra-5.155.15.0-1064.66~20.04.1
Ubuntu Pro 20.04 LTSlinux-oracleno fix
Ubuntu Pro 20.04 LTSlinux-oracle-5.155.15.0-1109.115~20.04.1
Ubuntu Pro 20.04 LTSlinux-raspino fix
Ubuntu Pro 20.04 LTSlinux-riscv-5.155.15.0-1106.110~20.04.1
Ubuntu Pro 20.04 LTSlinux-xilinx-zynqmpno fix
Ubuntu Pro FIPS-preview 22.04 LTSlinux-aws-fipsno fix
Ubuntu Pro FIPS-preview 22.04 LTSlinux-azure-fipsno fix
Ubuntu Pro FIPS-preview 22.04 LTSlinux-fipsno fix
Ubuntu Pro FIPS-preview 22.04 LTSlinux-gcp-fipsno fix
Ubuntu Pro FIPS-updates 16.04 LTSlinux-fipsno fix
Ubuntu Pro FIPS-updates 18.04 LTSlinux-aws-fipsno fix
Ubuntu Pro FIPS-updates 18.04 LTSlinux-azure-fipsno fix
Ubuntu Pro FIPS-updates 18.04 LTSlinux-fipsno fix
Ubuntu Pro FIPS-updates 18.04 LTSlinux-gcp-fipsno fix
Ubuntu Pro FIPS-updates 20.04 LTSlinux-aws-fipsno fix
Ubuntu Pro FIPS-updates 20.04 LTSlinux-azure-fipsno fix
Ubuntu Pro FIPS-updates 20.04 LTSlinux-fipsno fix
Ubuntu Pro FIPS-updates 20.04 LTSlinux-gcp-fipsno fix
Ubuntu Pro FIPS-updates 22.04 LTSlinux-aws-fips5.15.0-1112.119+fips1
Ubuntu Pro FIPS-updates 22.04 LTSlinux-azure-fips5.15.0-1117.126+fips1
Ubuntu Pro FIPS-updates 22.04 LTSlinux-fips5.15.0-186.196+fips1
Ubuntu Pro FIPS-updates 22.04 LTSlinux-gcp-fips5.15.0-1112.122+fips1
Ubuntu Pro FIPS-updates 24.04 LTSlinux-aws-fips6.8.0-1061.64+fips1
Ubuntu Pro FIPS-updates 24.04 LTSlinux-azure-fips6.8.0-1063.71+fips2
Ubuntu Pro FIPS-updates 24.04 LTSlinux-fips6.8.0-136.136+fips2
Ubuntu Pro FIPS-updates 24.04 LTSlinux-gcp-fips6.8.0-1064.72+fips1
Ubuntu Pro FIPS 16.04 LTSlinux-fipsno fix
Ubuntu Pro FIPS 18.04 LTSlinux-aws-fipsno fix
Ubuntu Pro FIPS 18.04 LTSlinux-azure-fipsno fix
Ubuntu Pro FIPS 18.04 LTSlinux-fipsno fix
Ubuntu Pro FIPS 18.04 LTSlinux-gcp-fipsno fix
Ubuntu Pro FIPS 20.04 LTSlinux-aws-fipsno fix
Ubuntu Pro FIPS 20.04 LTSlinux-azure-fipsno fix
Ubuntu Pro FIPS 20.04 LTSlinux-fipsno fix
Ubuntu Pro FIPS 20.04 LTSlinux-gcp-fipsno fix
Ubuntu Pro Realtime 22.04 LTSlinux-intel-iot-realtime5.15.0-1104.106
Ubuntu Pro Realtime 22.04 LTSlinux-realtime5.15.0-1111.120
Ubuntu Pro Realtime 22.04 LTSlinux-realtime-6.86.8.1-1056.57~22.04.2
Ubuntu Pro Realtime 24.04 LTSlinux-raspi-realtime6.8.0-2050.52
Ubuntu Pro Realtime 24.04 LTSlinux-realtime6.8.1-1056.57
Ubuntu Pro Realtime 24.04 LTSlinux-realtime-6.14no fix
Ubuntu Pro Realtime 24.04 LTSlinux-realtime-6.17no fix