{"id":"CVE-2026-72018","title":"dibs: loopback: validate offset and size in move_data()","summary":"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 excee…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= f7a22071dbf316c982fb44308874bd7ad9ac2091 < ee188a6b264b71315a67f1b9470faad308b730d2","Linux >= f7a22071dbf316c982fb44308874bd7ad9ac2091 < b2f426a9a22886071966432ede8fceafffe12b8c","Linux >= f7a22071dbf316c982fb44308874bd7ad9ac2091 < 94fe0ab01b480b52bd8f977edbd845ef375d69fd","Linux >= f7a22071dbf316c982fb44308874bd7ad9ac2091 < 78237e3c0720fcc6eb9b87e90fd70f63eeca886f","Linux 6.10"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T18:42:10.930913Z"},"exploitAvailable":true,"published":"2026-08-15","updated":"2026-10-16","sourceUpdated":"2026-10-16T18:42:39.883Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-72018","references":[{"url":"https://git.kernel.org/stable/c/ee188a6b264b71315a67f1b9470faad308b730d2"},{"url":"https://git.kernel.org/stable/c/b2f426a9a22886071966432ede8fceafffe12b8c"},{"url":"https://git.kernel.org/stable/c/94fe0ab01b480b52bd8f977edbd845ef375d69fd"},{"url":"https://git.kernel.org/stable/c/78237e3c0720fcc6eb9b87e90fd70f63eeca886f"}],"tags":["cve.org","exploit-available"],"epss":0.00175,"epssPercentile":0.06537,"exploits":{"github":1,"githubRepos":["https://github.com/0xBlackash/CVE-2026-72018"],"checkedAt":"2026-10-16T19:46:58.904Z"},"ingestedAt":"2026-10-16T19:46:24.433Z","slug":"CVE-2026-72018","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `Linux >= f7a22071dbf316c982fb44308874bd7ad9ac2091 < ee188a6b264b71315a67f1b9470faad308b730d2`\n- `Linux >= f7a22071dbf316c982fb44308874bd7ad9ac2091 < b2f426a9a22886071966432ede8fceafffe12b8c`\n- `Linux >= f7a22071dbf316c982fb44308874bd7ad9ac2091 < 94fe0ab01b480b52bd8f977edbd845ef375d69fd`\n- `Linux >= f7a22071dbf316c982fb44308874bd7ad9ac2091 < 78237e3c0720fcc6eb9b87e90fd70f63eeca886f`\n- `Linux 6.10`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":55,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":12,"ransomware":0},"changes":[]}