{"id":"CVE-2023-54024","summary":"KVM: Destroy target device if coalesced MMIO unregistration fails","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: Destroy target device if coalesced MMIO unregistration fails\n\nDestroy and free the target coalesced MMIO device if unregistering said\ndevice fails.  As clearly noted in the code, kvm_io_bus_unregister_dev()\ndoes not destroy the target device.\n\n  BUG: memory leak\n  unreferenced object 0xffff888112a54880 (size 64):\n    comm \"syz-executor.2\", pid 5258, jiffies 4297861402 (age 14.129s)\n    hex dump (first 32 bytes):\n      38 c7 67 15 00 c9 ff ff 38 c7 67 15 00 c9 ff ff  8.g.....8.g.....\n      e0 c7 e1 83 ff ff ff ff 00 30 67 15 00 c9 ff ff  .........0g.....\n    backtrace:\n      [\u003c0000000006995a8a\u003e] kmalloc include/linux/slab.h:556 [inline]\n      [\u003c0000000006995a8a\u003e] kzalloc include/linux/slab.h:690 [inline]\n      [\u003c0000000006995a8a\u003e] kvm_vm_ioctl_register_coalesced_mmio+0x8e/0x3d0 arch/x86/kvm/../../../virt/kvm/coalesced_mmio.c:150\n      [\u003c00000000022550c2\u003e] kvm_vm_ioctl+0x47d/0x1600 arch/x86/kvm/../../../virt/kvm/kvm_main.c:3323\n      [\u003c000000008a75102f\u003e] vfs_ioctl fs/ioctl.c:46 [inline]\n      [\u003c000000008a75102f\u003e] file_ioctl fs/ioctl.c:509 [inline]\n      [\u003c000000008a75102f\u003e] do_vfs_ioctl+0xbab/0x1160 fs/ioctl.c:696\n      [\u003c0000000080e3f669\u003e] ksys_ioctl+0x76/0xa0 fs/ioctl.c:713\n      [\u003c0000000059ef4888\u003e] __do_sys_ioctl fs/ioctl.c:720 [inline]\n      [\u003c0000000059ef4888\u003e] __se_sys_ioctl fs/ioctl.c:718 [inline]\n      [\u003c0000000059ef4888\u003e] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:718\n      [\u003c000000006444fa05\u003e] do_syscall_64+0x9f/0x4e0 arch/x86/entry/common.c:290\n      [\u003c000000009a4ed50b\u003e] entry_SYSCALL_64_after_hwframe+0x49/0xbe\n\n  BUG: leak checking failed","modified":"2026-03-20T12:33:24.385960Z","published":"2025-12-24T10:55:53.718Z","related":["SUSE-SU-2026:0263-1","SUSE-SU-2026:0317-1","SUSE-SU-2026:0350-1","SUSE-SU-2026:0369-1","SUSE-SU-2026:0411-1","SUSE-SU-2026:0617-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/54xxx/CVE-2023-54024.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/10c2a20d73e99463e69b7e92706791656adc16d7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/76a9886e1b61ce5592df5ae78a19ed30399ae189"},{"type":"WEB","url":"https://git.kernel.org/stable/c/999439fd5da5a76253e2f2c37b94204f47d75491"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b1cb1fac22abf102ffeb29dd3eeca208a3869d54"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ccf6a7fb1aedb1472e1241ee55e4d26b68f8d066"},{"type":"WEB","url":"https://git.kernel.org/stable/c/fb436dd6914325075f07d19851ab277b7a693ae7"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/54xxx/CVE-2023-54024.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2023-54024"},{"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":"7d1bc32d6477ff96a32695ea4be8144e4513ab2d"},{"fixed":"10c2a20d73e99463e69b7e92706791656adc16d7"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"2a20592baff59c5351c5200ec667e1a2aa22af85"},{"fixed":"76a9886e1b61ce5592df5ae78a19ed30399ae189"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"5d3c4c79384af06e3c8e25b7770b6247496b4417"},{"fixed":"999439fd5da5a76253e2f2c37b94204f47d75491"},{"fixed":"ccf6a7fb1aedb1472e1241ee55e4d26b68f8d066"},{"fixed":"fb436dd6914325075f07d19851ab277b7a693ae7"},{"fixed":"b1cb1fac22abf102ffeb29dd3eeca208a3869d54"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"0"},{"last_affected":"168e82f640ed1891a700bdb43e37da354b2ab63c"},{"last_affected":"50cbad42bfea8c052b7ca590bd4126cdc898713c"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-54024.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.4.235"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.5.0"},{"fixed":"5.10.173"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.99"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.13.0"},{"fixed":"6.1.16"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.2.3"}]}],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-54024.json"}}],"schema_version":"1.7.5"}