{"id":"CVE-2024-43819","title":"kvm: s390: Reject memory region operations for ucontrol VMs","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nkvm: s390: Reject memory region operations for ucontrol VMs\n\nThis change rejects the KVM_SET_USER_MEMORY_REGION and\nKVM_SET_USER_MEMORY_REGION2 ioctls when called on a …","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 27e0393f15fc8bc855c6a888387ff5ffd2181089 < 705a8b8cc5a44b206096abb1bfdc8bc43b3c75c7","Linux >= 27e0393f15fc8bc855c6a888387ff5ffd2181089 < 49c9945c054df4c22008e2bf87ca74d3e2507aa6","Linux >= 27e0393f15fc8bc855c6a888387ff5ffd2181089 < 7816e58967d0e6cadce05c8540b47ed027dc2499","Linux 3.4"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2024-09-10T16:09:06.730085Z"},"published":"2024-08-17","updated":"2026-10-21","sourceUpdated":"2026-10-21T12:35:06.684Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2024-43819","references":[{"url":"https://git.kernel.org/stable/c/705a8b8cc5a44b206096abb1bfdc8bc43b3c75c7"},{"url":"https://git.kernel.org/stable/c/49c9945c054df4c22008e2bf87ca74d3e2507aa6"},{"url":"https://git.kernel.org/stable/c/7816e58967d0e6cadce05c8540b47ed027dc2499"}],"tags":["cve.org"],"epss":0.00287,"epssPercentile":0.21069,"ingestedAt":"2026-10-21T12:48:53.733Z","slug":"CVE-2024-43819","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nkvm: s390: Reject memory region operations for ucontrol VMs\n\nThis change rejects the KVM_SET_USER_MEMORY_REGION and\nKVM_SET_USER_MEMORY_REGION2 ioctls when called on a ucontrol VM.\nThis is necessary since ucontrol VMs have kvm->arch.gmap set to 0 and\nwould thus result in a null pointer dereference further in.\nMemory management needs to be performed in userspace and using the\nioctls KVM_S390_UCAS_MAP and KVM_S390_UCAS_UNMAP.\n\nAlso improve s390 specific documentation for KVM_SET_USER_MEMORY_REGION\nand KVM_SET_USER_MEMORY_REGION2.\n\n[frankja@linux.ibm.com: commit message spelling fix, subject prefix fix]\n\n## Affected\n\n- `Linux >= 27e0393f15fc8bc855c6a888387ff5ffd2181089 < 705a8b8cc5a44b206096abb1bfdc8bc43b3c75c7`\n- `Linux >= 27e0393f15fc8bc855c6a888387ff5ffd2181089 < 49c9945c054df4c22008e2bf87ca74d3e2507aa6`\n- `Linux >= 27e0393f15fc8bc855c6a888387ff5ffd2181089 < 7816e58967d0e6cadce05c8540b47ed027dc2499`\n- `Linux 3.4`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}