{"api_version":"1","generated_at":"2026-10-26T08:56:27+00:00","cve":"CVE-2026-99036","urls":{"html":"https://cve.report/CVE-2026-99036","api":"https://cve.report/api/cve/CVE-2026-99036.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-99036","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-99036"},"summary":{"title":"dm: fix reading free memory in do_resume","description":"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 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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-10-23 13:17:26","updated_at":"2026-10-26 07:17:18"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/e3bf232c913b7e0103d323f15e6342d37cb1b357","name":"https://git.kernel.org/stable/c/e3bf232c913b7e0103d323f15e6342d37cb1b357","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/281f68d6cf8acb2547ebf0a849b8beae8fb0ec3c","name":"https://git.kernel.org/stable/c/281f68d6cf8acb2547ebf0a849b8beae8fb0ec3c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/2c96d1a8324e7736e0f8a5790ecf39d36c2c4a82","name":"https://git.kernel.org/stable/c/2c96d1a8324e7736e0f8a5790ecf39d36c2c4a82","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/301691c32b8ad023e3316d5dbb6a8cf52d47b0dc","name":"https://git.kernel.org/stable/c/301691c32b8ad023e3316d5dbb6a8cf52d47b0dc","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c9417c1c5269e2bd0570fbe53e4ec03a8d31f008","name":"https://git.kernel.org/stable/c/c9417c1c5269e2bd0570fbe53e4ec03a8d31f008","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-99036","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-99036","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d58168763f74d1edbc296d7038c60efe6493fdd4 281f68d6cf8acb2547ebf0a849b8beae8fb0ec3c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d58168763f74d1edbc296d7038c60efe6493fdd4 2c96d1a8324e7736e0f8a5790ecf39d36c2c4a82 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d58168763f74d1edbc296d7038c60efe6493fdd4 e3bf232c913b7e0103d323f15e6342d37cb1b357 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d58168763f74d1edbc296d7038c60efe6493fdd4 301691c32b8ad023e3316d5dbb6a8cf52d47b0dc git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d58168763f74d1edbc296d7038c60efe6493fdd4 c9417c1c5269e2bd0570fbe53e4ec03a8d31f008 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2.6.29","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 2.6.29 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.160 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.113 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.57 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.11 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/md/dm-ioctl.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"281f68d6cf8acb2547ebf0a849b8beae8fb0ec3c","status":"affected","version":"d58168763f74d1edbc296d7038c60efe6493fdd4","versionType":"git"},{"lessThan":"2c96d1a8324e7736e0f8a5790ecf39d36c2c4a82","status":"affected","version":"d58168763f74d1edbc296d7038c60efe6493fdd4","versionType":"git"},{"lessThan":"e3bf232c913b7e0103d323f15e6342d37cb1b357","status":"affected","version":"d58168763f74d1edbc296d7038c60efe6493fdd4","versionType":"git"},{"lessThan":"301691c32b8ad023e3316d5dbb6a8cf52d47b0dc","status":"affected","version":"d58168763f74d1edbc296d7038c60efe6493fdd4","versionType":"git"},{"lessThan":"c9417c1c5269e2bd0570fbe53e4ec03a8d31f008","status":"affected","version":"d58168763f74d1edbc296d7038c60efe6493fdd4","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/md/dm-ioctl.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.29"},{"lessThan":"2.6.29","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.160","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.113","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.57","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.11","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.160","versionStartIncluding":"2.6.29","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.113","versionStartIncluding":"2.6.29","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.57","versionStartIncluding":"2.6.29","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.11","versionStartIncluding":"2.6.29","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3","versionStartIncluding":"2.6.29","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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 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."}],"providerMetadata":{"dateUpdated":"2026-10-26T06:56:56.323Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"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"}],"title":"dm: fix reading free memory in do_resume","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-99036","datePublished":"2026-10-23T12:21:49.410Z","dateReserved":"2026-09-25T10:25:14.387Z","dateUpdated":"2026-10-26T06:56:56.323Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-10-23 13:17:26","lastModifiedDate":"2026-10-26 07:17:18","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"99036","Ordinal":"1","Title":"dm: fix reading free memory in do_resume","CVE":"CVE-2026-99036","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"99036","Ordinal":"1","NoteData":"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 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.","Type":"Description","Title":"dm: fix reading free memory in do_resume"}]}}}