{"api_version":"1","generated_at":"2026-08-22T04:27:10+00:00","cve":"CVE-2026-68165","urls":{"html":"https://cve.report/CVE-2026-68165","api":"https://cve.report/api/cve/CVE-2026-68165.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-68165","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-68165"},"summary":{"title":"mm/damon/core: validate ranges in damon_set_regions()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmm/damon/core: validate ranges in damon_set_regions()\n\nDAMON core logic assumes zero length regions don't exist.  However, a few\nDAMON API callers including DAMON_SYSFS, DAMON_RECLAIM and DAMON_LRU_SORT\nallow users to set empty monitoring target regions.  This could result in\nWARN_ONCE() on CONFIG_DAMON_DEBUG_SANITY enabled kernel, and\ndivide-by-zero from damon_merge_two_regions().\n\nFor example, the WANR_ONCE() can be triggered like below.\n\n    # grep DAMON_DEBUG_SANITY /boot/config-$(uname -r)\n    # CONFIG_DAMON_DEBUG_SANITY=y\n    # damo start\n    # cd /sys/kernel/mm/damon/admin/kdamonds/0\n    # echo 0 > contexts/0/targets/0/regions/0/start\n    # echo 0 > contexts/0/targets/0/regions/0/end\n    # echo commit > state\n    # dmesg\n    [....]\n    [   73.705780] ------------[ cut here ]------------\n    [   73.707552] start 0 >= end 0\n    [   73.708452] WARNING: mm/damon/core.c:359 at damon_new_region+0x6e/0x80, CPU#1: kdamond.0/758\n    [...]\n\nAll DAMON API callers eventually use damon_set_regions() to setup the\nregions.  Add the validation logic in the function.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-10 13:20:02","updated_at":"2026-08-19 17:20:33"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/71cf8a3ee1c18cfa8b88cc14bac9c2f43dd29f9b","name":"https://git.kernel.org/stable/c/71cf8a3ee1c18cfa8b88cc14bac9c2f43dd29f9b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/43aaddd0fa92010a68adeda7744c7cf497a1c8e9","name":"https://git.kernel.org/stable/c/43aaddd0fa92010a68adeda7744c7cf497a1c8e9","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b585facbafbb5cf117b37b1c75819ac046646c27","name":"https://git.kernel.org/stable/c/b585facbafbb5cf117b37b1c75819ac046646c27","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4b6f1d6d5d07855bd1bb9e64922b049062138bfa","name":"https://git.kernel.org/stable/c/4b6f1d6d5d07855bd1bb9e64922b049062138bfa","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1292c0ecb1caefb8ca064a3639d5673991e8810c","name":"https://git.kernel.org/stable/c/1292c0ecb1caefb8ca064a3639d5673991e8810c","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c927b73a5694c735314ea10e7c81c07f9bd51ad7","name":"https://git.kernel.org/stable/c/c927b73a5694c735314ea10e7c81c07f9bd51ad7","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-68165","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-68165","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 43b0536cb4710e7bb591edfda7e68a1c327a3409 71cf8a3ee1c18cfa8b88cc14bac9c2f43dd29f9b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 43b0536cb4710e7bb591edfda7e68a1c327a3409 b585facbafbb5cf117b37b1c75819ac046646c27 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 43b0536cb4710e7bb591edfda7e68a1c327a3409 c927b73a5694c735314ea10e7c81c07f9bd51ad7 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 43b0536cb4710e7bb591edfda7e68a1c327a3409 4b6f1d6d5d07855bd1bb9e64922b049062138bfa git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 43b0536cb4710e7bb591edfda7e68a1c327a3409 43aaddd0fa92010a68adeda7744c7cf497a1c8e9 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 43b0536cb4710e7bb591edfda7e68a1c327a3409 1292c0ecb1caefb8ca064a3639d5673991e8810c git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.16","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.16 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.183 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.148 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.101 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.42 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.6 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"68165","cve":"CVE-2026-68165","epss":"0.002000000","percentile":"0.101970000","score_date":"2026-08-19","updated_at":"2026-08-20 00:13:09"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["mm/damon/core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"71cf8a3ee1c18cfa8b88cc14bac9c2f43dd29f9b","status":"affected","version":"43b0536cb4710e7bb591edfda7e68a1c327a3409","versionType":"git"},{"lessThan":"b585facbafbb5cf117b37b1c75819ac046646c27","status":"affected","version":"43b0536cb4710e7bb591edfda7e68a1c327a3409","versionType":"git"},{"lessThan":"c927b73a5694c735314ea10e7c81c07f9bd51ad7","status":"affected","version":"43b0536cb4710e7bb591edfda7e68a1c327a3409","versionType":"git"},{"lessThan":"4b6f1d6d5d07855bd1bb9e64922b049062138bfa","status":"affected","version":"43b0536cb4710e7bb591edfda7e68a1c327a3409","versionType":"git"},{"lessThan":"43aaddd0fa92010a68adeda7744c7cf497a1c8e9","status":"affected","version":"43b0536cb4710e7bb591edfda7e68a1c327a3409","versionType":"git"},{"lessThan":"1292c0ecb1caefb8ca064a3639d5673991e8810c","status":"affected","version":"43b0536cb4710e7bb591edfda7e68a1c327a3409","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["mm/damon/core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.16"},{"lessThan":"5.16","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.183","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.148","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.101","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.42","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.6","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.183","versionStartIncluding":"5.16","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.148","versionStartIncluding":"5.16","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.101","versionStartIncluding":"5.16","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.42","versionStartIncluding":"5.16","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.6","versionStartIncluding":"5.16","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"5.16","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nmm/damon/core: validate ranges in damon_set_regions()\n\nDAMON core logic assumes zero length regions don't exist.  However, a few\nDAMON API callers including DAMON_SYSFS, DAMON_RECLAIM and DAMON_LRU_SORT\nallow users to set empty monitoring target regions.  This could result in\nWARN_ONCE() on CONFIG_DAMON_DEBUG_SANITY enabled kernel, and\ndivide-by-zero from damon_merge_two_regions().\n\nFor example, the WANR_ONCE() can be triggered like below.\n\n    # grep DAMON_DEBUG_SANITY /boot/config-$(uname -r)\n    # CONFIG_DAMON_DEBUG_SANITY=y\n    # damo start\n    # cd /sys/kernel/mm/damon/admin/kdamonds/0\n    # echo 0 > contexts/0/targets/0/regions/0/start\n    # echo 0 > contexts/0/targets/0/regions/0/end\n    # echo commit > state\n    # dmesg\n    [....]\n    [   73.705780] ------------[ cut here ]------------\n    [   73.707552] start 0 >= end 0\n    [   73.708452] WARNING: mm/damon/core.c:359 at damon_new_region+0x6e/0x80, CPU#1: kdamond.0/758\n    [...]\n\nAll DAMON API callers eventually use damon_set_regions() to setup the\nregions.  Add the validation logic in the function."}],"providerMetadata":{"dateUpdated":"2026-08-19T16:30:37.581Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/71cf8a3ee1c18cfa8b88cc14bac9c2f43dd29f9b"},{"url":"https://git.kernel.org/stable/c/b585facbafbb5cf117b37b1c75819ac046646c27"},{"url":"https://git.kernel.org/stable/c/c927b73a5694c735314ea10e7c81c07f9bd51ad7"},{"url":"https://git.kernel.org/stable/c/4b6f1d6d5d07855bd1bb9e64922b049062138bfa"},{"url":"https://git.kernel.org/stable/c/43aaddd0fa92010a68adeda7744c7cf497a1c8e9"},{"url":"https://git.kernel.org/stable/c/1292c0ecb1caefb8ca064a3639d5673991e8810c"}],"title":"mm/damon/core: validate ranges in damon_set_regions()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-68165","datePublished":"2026-08-10T11:59:33.152Z","dateReserved":"2026-07-30T09:28:09.372Z","dateUpdated":"2026-08-19T16:30:37.581Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-10 13:20:02","lastModifiedDate":"2026-08-19 17:20:33","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"68165","Ordinal":"1","Title":"mm/damon/core: validate ranges in damon_set_regions()","CVE":"CVE-2026-68165","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"68165","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nmm/damon/core: validate ranges in damon_set_regions()\n\nDAMON core logic assumes zero length regions don't exist.  However, a few\nDAMON API callers including DAMON_SYSFS, DAMON_RECLAIM and DAMON_LRU_SORT\nallow users to set empty monitoring target regions.  This could result in\nWARN_ONCE() on CONFIG_DAMON_DEBUG_SANITY enabled kernel, and\ndivide-by-zero from damon_merge_two_regions().\n\nFor example, the WANR_ONCE() can be triggered like below.\n\n    # grep DAMON_DEBUG_SANITY /boot/config-$(uname -r)\n    # CONFIG_DAMON_DEBUG_SANITY=y\n    # damo start\n    # cd /sys/kernel/mm/damon/admin/kdamonds/0\n    # echo 0 > contexts/0/targets/0/regions/0/start\n    # echo 0 > contexts/0/targets/0/regions/0/end\n    # echo commit > state\n    # dmesg\n    [....]\n    [   73.705780] ------------[ cut here ]------------\n    [   73.707552] start 0 >= end 0\n    [   73.708452] WARNING: mm/damon/core.c:359 at damon_new_region+0x6e/0x80, CPU#1: kdamond.0/758\n    [...]\n\nAll DAMON API callers eventually use damon_set_regions() to setup the\nregions.  Add the validation logic in the function.","Type":"Description","Title":"mm/damon/core: validate ranges in damon_set_regions()"}]}}}