{"id":"CVE-2026-72018","summary":"dibs: loopback: validate offset and size in move_data()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\ndibs: loopback: validate offset and size in move_data()\n\nThe loopback move_data() performs a memcpy into the registered DMB\nwithout checking whether offset + size exceeds the DMB length.  Unlike\nreal ISM hardware, which enforces memory region bounds natively, the\nsoftware loopback has no such protection.\n\nA peer-supplied out-of-bounds offset or oversized write would result in\nan OOB write past the allocated kernel buffer.  Add an explicit bounds\ncheck before the memcpy to reject such requests with -EINVAL.","modified":"2026-08-18T03:56:18.395115843Z","published":"2026-08-15T05:51:45.360Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72018.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/78237e3c0720fcc6eb9b87e90fd70f63eeca886f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/94fe0ab01b480b52bd8f977edbd845ef375d69fd"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b2f426a9a22886071966432ede8fceafffe12b8c"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ee188a6b264b71315a67f1b9470faad308b730d2"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/72xxx/CVE-2026-72018.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-72018"},{"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":"f7a22071dbf316c982fb44308874bd7ad9ac2091"},{"fixed":"ee188a6b264b71315a67f1b9470faad308b730d2"},{"fixed":"b2f426a9a22886071966432ede8fceafffe12b8c"},{"fixed":"94fe0ab01b480b52bd8f977edbd845ef375d69fd"},{"fixed":"78237e3c0720fcc6eb9b87e90fd70f63eeca886f"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72018.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.10.0"},{"fixed":"6.12.97"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.40"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-72018.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}