{"id":"CVE-2026-72105","revision":null,"records":[{"revision":"898500e8dda440aebbefc6996b502841","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-72105","aliases":[],"title":"dm-log: fix a bitset_size overflow on 32bit machines","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndm-log: fix a bitset_size overflow on 32bit machines\n\nCommit c20e36b7631d (\"dm log: fix out-of-bounds write due to\nregion_count overflow\") made sure that region_count could fit in an\nunsigned int. But the bitmap memory isn't allocated based on\nregion_count. It uses bitset_size (a size_t variable). The first step of\ncalculating bitset_size is to set it to region_count, rounded up to a\nmultiple of BITS_PER_LONG. If region_size is less than BITS_PER_LONG\nsmaller than UINT_MAX, it will get rounded up to 2^32. On a 32bit\narchitecture, this will make bitset_size wrap around to 0 and fail,\ndespite region_count being valid.\n\nSince bitset_size gets divided by 8, it can hold any valid region_count.\nIt just needs a special case to handle the rollover. If it is 0, the\nvalue rolled over, and bitset size should be set to the number of bytes\nneeded to hold 2^32 bits.","state":0,"publishedAt":"2026-08-15T05:52:48.099+00:00","modifiedAt":"2026-10-19T21:19:28.267+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"unaffected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"drivers/md/dm-log.c\"\n ],\n \"versions\": [\n {\n \"version\": \"44ab8875ae4a2842bde2d756bed195d375e0debb\",\n \"lessThan\": \"cdc4ddf9db2cb79f4ab86b1a509b7ac21b0b6cf5\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"defe483e47173768c227532694dc78cb65db5f09\",\n \"lessThan\": \"4b0de5a3ac1fd42acb0dc1f80ac5747e3287d723\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"3ec74da927b4e171a6fc0e77b1188ba4d019af51\",\n \"lessThan\": \"567602fa72d57169365cbc589e0b8c3be900636d\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"d4ac87567f86a55c3c92e9a5144dcd943a9772a1\",\n \"lessThan\": \"d05e0edfecf5260e6dddd28b2f0cce02bfc6ed7a\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"12bd5b88e91a02785244ff1d20fb157e96e9cdc8\",\n \"lessThan\": \"1c3412b584e1fb6c665ff33ba7259253bc0082cb\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"b455903eed4558982be0811f5b7f44f6bbc4ff57\",\n \"lessThan\": \"e0b0163a65758ec3a2361ae1cea407898c27f21e\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"c20e36b7631d83e7535877f08af8b0af72c44b1a\",\n \"lessThan\": \"79feb87ab2396d49b9b65e4bb815d33cc71cba47\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"c20e36b7631d83e7535877f08af8b0af72c44b1a\",\n \"lessThan\": \"9743132a41f4d9d0e54c5f2adcb821b04796bab1\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"4ec8323b9f0764a14d532b1ae9b87f8a9fecb867\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"5.10.258\",\n \"lessThan\": \"5.10.261\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.209\",\n \"lessThan\": \"5.15.212\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.175\",\n \"lessThan\": \"6.1.178\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.141\",\n \"lessThan\": \"6.6.145\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.91\",\n \"lessThan\": \"6.12.97\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.33\",\n \"lessThan\": \"6.18.40\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.0.10\",\n \"lessThan\": \"7.1\",\n \"status\": \"affected\",\n \"versionType\": \"semver\"\n }\n ]\n }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"affected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"drivers/md/dm-log.c\"\n ],\n \"versions\": [\n {\n \"version\": \"7.1\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"7.1\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.261\",\n \"lessThanOrEqual\": \"5.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.212\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.178\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.145\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.97\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.40\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.1.5\",\n \"lessThanOrEqual\": \"7.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.2\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/cdc4ddf9db2cb79f4ab86b1a509b7ac21b0b6cf5","https://git.kernel.org/stable/c/4b0de5a3ac1fd42acb0dc1f80ac5747e3287d723","https://git.kernel.org/stable/c/567602fa72d57169365cbc589e0b8c3be900636d","https://git.kernel.org/stable/c/d05e0edfecf5260e6dddd28b2f0cce02bfc6ed7a","https://git.kernel.org/stable/c/1c3412b584e1fb6c665ff33ba7259253bc0082cb","https://git.kernel.org/stable/c/e0b0163a65758ec3a2361ae1cea407898c27f21e","https://git.kernel.org/stable/c/79feb87ab2396d49b9b65e4bb815d33cc71cba47","https://git.kernel.org/stable/c/9743132a41f4d9d0e54c5f2adcb821b04796bab1"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-72105","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-72105","identifiers":["CVE-2026-72105"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all 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