{"id":"CVE-2026-46161","state":"PUBLISHED","title":"md/raid10: fix divide-by-zero in setup_geo() with zero far_copies","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmd/raid10: fix divide-by-zero in setup_geo() with zero far_copies\n\nsetup_geo() extracts near_copies (nc) and far_copies (fc) from the\nuser-provided layout parameter without checking for zero. When fc=0\nwith the \"improved\" far set layout selected, 'geo->far_set_size =\ndisks / fc' triggers a divide-by-zero.\n\nValidate nc and fc immediately after extraction, returning -1 if\neither is zero.","publishedAt":"2026-05-28T09:36:16.428Z","updatedAt":"2026-10-15T01:20:53.911Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"475901aff15841fb0a81e7546517407779a9b061","status":"affected","lessThan":"0b43a70394ce492274e67463326be03e0a9897c5","versionType":"git"},{"version":"475901aff15841fb0a81e7546517407779a9b061","status":"affected","lessThan":"c716ab3034f84f8a6c226814247b8c5ac9f95da1","versionType":"git"},{"version":"475901aff15841fb0a81e7546517407779a9b061","status":"affected","lessThan":"553e32adfa1a96b217651139a3f8c3b92b9984ac","versionType":"git"},{"version":"475901aff15841fb0a81e7546517407779a9b061","status":"affected","lessThan":"4af2e558e6fdfb972c61350653fd55d1f62b60a5","versionType":"git"},{"version":"475901aff15841fb0a81e7546517407779a9b061","status":"affected","lessThan":"9d8e03b9a2b1e8ce5c198bf3a409a629f4d02cda","versionType":"git"},{"version":"475901aff15841fb0a81e7546517407779a9b061","status":"affected","lessThan":"913d556e4bd1b56ed822815655b82c7bb54edc51","versionType":"git"},{"version":"475901aff15841fb0a81e7546517407779a9b061","status":"affected","lessThan":"f9ddb621b2325eb69c95692958daf2bab4dea2c4","versionType":"git"},{"version":"475901aff15841fb0a81e7546517407779a9b061","status":"affected","lessThan":"9aa6d860b0930e2f72795665c42c44252a558a0c","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/md/raid10.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.9","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.9","versionType":"semver"},{"version":"5.10.258","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.209","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.175","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.140","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.88","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.30","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.7","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/md/raid10.c"]}],"references":["https://git.kernel.org/stable/c/0b43a70394ce492274e67463326be03e0a9897c5","https://git.kernel.org/stable/c/c716ab3034f84f8a6c226814247b8c5ac9f95da1","https://git.kernel.org/stable/c/553e32adfa1a96b217651139a3f8c3b92b9984ac","https://git.kernel.org/stable/c/4af2e558e6fdfb972c61350653fd55d1f62b60a5","https://git.kernel.org/stable/c/9d8e03b9a2b1e8ce5c198bf3a409a629f4d02cda","https://git.kernel.org/stable/c/913d556e4bd1b56ed822815655b82c7bb54edc51","https://git.kernel.org/stable/c/f9ddb621b2325eb69c95692958daf2bab4dea2c4","https://git.kernel.org/stable/c/9aa6d860b0930e2f72795665c42c44252a558a0c","https://cert-portal.siemens.com/productcert/html/ssa-784472.html"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/46xxx/CVE-2026-46161.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-46161","state":"PUBLISHED","datePublished":"2026-05-28T09:36:16.428Z","dateUpdated":"2026-10-15T01:20:53.911Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-05-13T15:03:33.102Z"},"containers":{"cna":{"title":"md/raid10: fix divide-by-zero in setup_geo() with zero far_copies","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nmd/raid10: fix divide-by-zero in setup_geo() with zero far_copies\n\nsetup_geo() extracts near_copies (nc) and far_copies (fc) from the\nuser-provided layout parameter without checking for zero. When fc=0\nwith the \"improved\" far set layout selected, 'geo->far_set_size =\ndisks / fc' triggers a divide-by-zero.\n\nValidate nc and fc immediately after extraction, returning -1 if\neither is zero."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"475901aff15841fb0a81e7546517407779a9b061","status":"affected","lessThan":"0b43a70394ce492274e67463326be03e0a9897c5","versionType":"git"},{"version":"475901aff15841fb0a81e7546517407779a9b061","status":"affected","lessThan":"c716ab3034f84f8a6c226814247b8c5ac9f95da1","versionType":"git"},{"version":"475901aff15841fb0a81e7546517407779a9b061","status":"affected","lessThan":"553e32adfa1a96b217651139a3f8c3b92b9984ac","versionType":"git"},{"version":"475901aff15841fb0a81e7546517407779a9b061","status":"affected","lessThan":"4af2e558e6fdfb972c61350653fd55d1f62b60a5","versionType":"git"},{"version":"475901aff15841fb0a81e7546517407779a9b061","status":"affected","lessThan":"9d8e03b9a2b1e8ce5c198bf3a409a629f4d02cda","versionType":"git"},{"version":"475901aff15841fb0a81e7546517407779a9b061","status":"affected","lessThan":"913d556e4bd1b56ed822815655b82c7bb54edc51","versionType":"git"},{"version":"475901aff15841fb0a81e7546517407779a9b061","status":"affected","lessThan":"f9ddb621b2325eb69c95692958daf2bab4dea2c4","versionType":"git"},{"version":"475901aff15841fb0a81e7546517407779a9b061","status":"affected","lessThan":"9aa6d860b0930e2f72795665c42c44252a558a0c","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/md/raid10.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.9","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.9","versionType":"semver"},{"version":"5.10.258","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.209","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.175","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.140","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.88","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.30","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.7","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/md/raid10.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/0b43a70394ce492274e67463326be03e0a9897c5"},{"url":"https://git.kernel.org/stable/c/c716ab3034f84f8a6c226814247b8c5ac9f95da1"},{"url":"https://git.kernel.org/stable/c/553e32adfa1a96b217651139a3f8c3b92b9984ac"},{"url":"https://git.kernel.org/stable/c/4af2e558e6fdfb972c61350653fd55d1f62b60a5"},{"url":"https://git.kernel.org/stable/c/9d8e03b9a2b1e8ce5c198bf3a409a629f4d02cda"},{"url":"https://git.kernel.org/stable/c/913d556e4bd1b56ed822815655b82c7bb54edc51"},{"url":"https://git.kernel.org/stable/c/f9ddb621b2325eb69c95692958daf2bab4dea2c4"},{"url":"https://git.kernel.org/stable/c/9aa6d860b0930e2f72795665c42c44252a558a0c"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-06-14T17:59:07.789Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"5.10.258"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"5.15.209"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"6.1.175"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"6.6.140"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"6.12.88"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"6.18.30"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"7.0.7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.9","versionEndExcluding":"7.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"affected":[{"vendor":"Siemens","product":"SIMATIC S7-1500 TM MFP - 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