{"id":"CVE-2026-99036","title":"dm: fix reading free memory in do_resume","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ndm: fix reading free memory in do_resume\n\nWhen do_resume calls dm_table_get_mode(new_map), the call is done without\nholding any locks (it only holds a reference to the …","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 281f68d6cf8acb2547ebf0a849b8beae8fb0ec3c","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 2c96d1a8324e7736e0f8a5790ecf39d36c2c4a82","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < e3bf232c913b7e0103d323f15e6342d37cb1b357","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 301691c32b8ad023e3316d5dbb6a8cf52d47b0dc","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < c9417c1c5269e2bd0570fbe53e4ec03a8d31f008","Linux < 6.6.160","Linux < 6.12.113","Linux < 6.18.57","Linux < 7.2.11","Linux (all versions)"],"published":"2026-10-23","updated":"2026-10-23","sourceUpdated":"2026-10-23T12:21:49.410Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-99036","references":[{"url":"https://git.kernel.org/stable/c/281f68d6cf8acb2547ebf0a849b8beae8fb0ec3c"},{"url":"https://git.kernel.org/stable/c/2c96d1a8324e7736e0f8a5790ecf39d36c2c4a82"},{"url":"https://git.kernel.org/stable/c/e3bf232c913b7e0103d323f15e6342d37cb1b357"},{"url":"https://git.kernel.org/stable/c/301691c32b8ad023e3316d5dbb6a8cf52d47b0dc"},{"url":"https://git.kernel.org/stable/c/c9417c1c5269e2bd0570fbe53e4ec03a8d31f008"}],"tags":["cve.org"],"ingestedAt":"2026-10-23T13:24:55.529Z","slug":"CVE-2026-99036","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ndm: fix reading free memory in do_resume\n\nWhen do_resume calls dm_table_get_mode(new_map), the call is done without\nholding any locks (it only holds a reference to the md). It may be\npossible that another concurrent ioctl on the same device will swap table\nafter dm_swap_table and before dm_table_get_mode. In this case,\ndm_table_get_mode(new_map) reads freed memory.\n\nThis race condition was triggered by syzbot.\n\nThis commit fixes the race by reading mode of the new table before\ndm_swap_table. Note that new_map is also passed to dm_ima_need_measure,\nbut this function doesn't attempt to dereference it, so this call should\nbe safe.\n\nNote that this is not a security bug because only root can trigger it and\nthe commonly used tools such as lvm or cryptsetup do not call the ioctls\nconcurrently, so that they can't trigger it acceidentally.\n\n## Affected\n\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 281f68d6cf8acb2547ebf0a849b8beae8fb0ec3c`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 2c96d1a8324e7736e0f8a5790ecf39d36c2c4a82`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < e3bf232c913b7e0103d323f15e6342d37cb1b357`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 301691c32b8ad023e3316d5dbb6a8cf52d47b0dc`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < c9417c1c5269e2bd0570fbe53e4ec03a8d31f008`\n- `Linux < 6.6.160`\n- `Linux < 6.12.113`\n- `Linux < 6.18.57`\n- `Linux < 7.2.11`\n- `Linux (all versions)`\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,"exploitation":0,"ransomware":0},"changes":[]}