{"api_version":"1","generated_at":"2026-06-13T23:31:45+00:00","cve":"CVE-2026-52905","urls":{"html":"https://cve.report/CVE-2026-52905","api":"https://cve.report/api/cve/CVE-2026-52905.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-52905","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-52905"},"summary":{"title":"mm/damon/core: disallow non-power of two min_region_sz on damon_start()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmm/damon/core: disallow non-power of two min_region_sz on damon_start()\n\nCommit d8f867fa0825 (\"mm/damon: add damon_ctx->min_sz_region\") introduced\na bug that allows unaligned DAMON region address ranges.  Commit\nc80f46ac228b (\"mm/damon/core: disallow non-power of two min_region_sz\")\nfixed it, but only for damon_commit_ctx() use case.  Still, DAMON sysfs\ninterface can emit non-power of two min_region_sz via damon_start().  Fix\nthe path by adding the is_power_of_2() check on damon_start().\n\nThe issue was discovered by sashiko [1].","state":"PUBLISHED","assigner":"Linux","published_at":"2026-06-09 14:16:44","updated_at":"2026-06-09 14:16:44"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/89b6226b6c2a4add3939f361653a47c212d6ab75","name":"https://git.kernel.org/stable/c/89b6226b6c2a4add3939f361653a47c212d6ab75","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/95093e5cb4c5b50a5b1a4b79f2942b62744bd66a","name":"https://git.kernel.org/stable/c/95093e5cb4c5b50a5b1a4b79f2942b62744bd66a","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1de2db19a6028abe7d905875922faef5b873de67","name":"https://git.kernel.org/stable/c/1de2db19a6028abe7d905875922faef5b873de67","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-52905","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-52905","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d8f867fa0825fb3e358457566d7326d8aab2406a 1de2db19a6028abe7d905875922faef5b873de67 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d8f867fa0825fb3e358457566d7326d8aab2406a 89b6226b6c2a4add3939f361653a47c212d6ab75 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d8f867fa0825fb3e358457566d7326d8aab2406a 95093e5cb4c5b50a5b1a4b79f2942b62744bd66a git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.18","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.30 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0.4 7.0.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"52905","cve":"CVE-2026-52905","epss":"0.000170000","percentile":"0.042700000","score_date":"2026-06-12","updated_at":"2026-06-13 00:07:16"},"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":"1de2db19a6028abe7d905875922faef5b873de67","status":"affected","version":"d8f867fa0825fb3e358457566d7326d8aab2406a","versionType":"git"},{"lessThan":"89b6226b6c2a4add3939f361653a47c212d6ab75","status":"affected","version":"d8f867fa0825fb3e358457566d7326d8aab2406a","versionType":"git"},{"lessThan":"95093e5cb4c5b50a5b1a4b79f2942b62744bd66a","status":"affected","version":"d8f867fa0825fb3e358457566d7326d8aab2406a","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":"6.18"},{"lessThan":"6.18","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.30","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.4","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.30","versionStartIncluding":"6.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0.4","versionStartIncluding":"6.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1-rc1","versionStartIncluding":"6.18","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nmm/damon/core: disallow non-power of two min_region_sz on damon_start()\n\nCommit d8f867fa0825 (\"mm/damon: add damon_ctx->min_sz_region\") introduced\na bug that allows unaligned DAMON region address ranges.  Commit\nc80f46ac228b (\"mm/damon/core: disallow non-power of two min_region_sz\")\nfixed it, but only for damon_commit_ctx() use case.  Still, DAMON sysfs\ninterface can emit non-power of two min_region_sz via damon_start().  Fix\nthe path by adding the is_power_of_2() check on damon_start().\n\nThe issue was discovered by sashiko [1]."}],"providerMetadata":{"dateUpdated":"2026-06-09T12:36:02.516Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/1de2db19a6028abe7d905875922faef5b873de67"},{"url":"https://git.kernel.org/stable/c/89b6226b6c2a4add3939f361653a47c212d6ab75"},{"url":"https://git.kernel.org/stable/c/95093e5cb4c5b50a5b1a4b79f2942b62744bd66a"}],"title":"mm/damon/core: disallow non-power of two min_region_sz on damon_start()","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-52905","datePublished":"2026-06-09T12:36:02.516Z","dateReserved":"2026-06-09T07:44:35.366Z","dateUpdated":"2026-06-09T12:36:02.516Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-06-09 14:16:44","lastModifiedDate":"2026-06-09 14:16:44","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"52905","Ordinal":"1","Title":"mm/damon/core: disallow non-power of two min_region_sz on damon_","CVE":"CVE-2026-52905","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"52905","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nmm/damon/core: disallow non-power of two min_region_sz on damon_start()\n\nCommit d8f867fa0825 (\"mm/damon: add damon_ctx->min_sz_region\") introduced\na bug that allows unaligned DAMON region address ranges.  Commit\nc80f46ac228b (\"mm/damon/core: disallow non-power of two min_region_sz\")\nfixed it, but only for damon_commit_ctx() use case.  Still, DAMON sysfs\ninterface can emit non-power of two min_region_sz via damon_start().  Fix\nthe path by adding the is_power_of_2() check on damon_start().\n\nThe issue was discovered by sashiko [1].","Type":"Description","Title":"mm/damon/core: disallow non-power of two min_region_sz on damon_"}]}}}