{"id":"CVE-2024-43819","summary":"kvm: s390: Reject memory region operations for ucontrol VMs","details":"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 ucontrol VM.\nThis is necessary since ucontrol VMs have kvm-\u003earch.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]","modified":"2026-04-02T12:18:12.880850Z","published":"2024-08-17T09:21:40.994Z","related":["SUSE-SU-2024:3189-1","SUSE-SU-2024:3190-1","SUSE-SU-2024:3194-1","SUSE-SU-2024:3195-1","SUSE-SU-2024:3209-1","SUSE-SU-2024:3251-1","SUSE-SU-2024:3252-1","SUSE-SU-2024:3383-1","SUSE-SU-2024:3483-1","SUSE-SU-2025:20044-1","SUSE-SU-2025:20047-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/43xxx/CVE-2024-43819.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/49c9945c054df4c22008e2bf87ca74d3e2507aa6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/7816e58967d0e6cadce05c8540b47ed027dc2499"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/43xxx/CVE-2024-43819.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-43819"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"27e0393f15fc8bc855c6a888387ff5ffd2181089"},{"fixed":"49c9945c054df4c22008e2bf87ca74d3e2507aa6"},{"fixed":"7816e58967d0e6cadce05c8540b47ed027dc2499"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-43819.json"}}],"schema_version":"1.7.5"}