{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-68478", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-30T09:28:09.397Z", "datePublished": "2026-08-15T05:51:33.441Z", "dateUpdated": "2026-08-15T05:51:33.441Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-15T05:51:33.441Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmemstick: ms_block: reject a card that reports too many blocks\n\nmsb_ftl_initialize() computes the zone count from the card block count\nwith no bound:\n\n\tmsb->zone_count = msb->block_count / MS_BLOCKS_IN_ZONE;\n\t...\n\tfor (i = 0; i < msb->zone_count; i++)\n\t\tmsb->free_block_count[i] = MS_BLOCKS_IN_ZONE;\n\nmsb->block_count is a card value. msb_read_boot_blocks() reads\nnumber_of_blocks from the card boot page and byte swaps it.\nfree_block_count is a fixed int[MS_MAX_ZONES]. MS_MAX_ZONES is 16, so the\nvalid indices are 0 to 15. The init loop above indexes it by zone_count.\nmsb_mark_block_used() and msb_mark_block_unused() index it by\npba / MS_BLOCKS_IN_ZONE, for pba up to block_count - 1. A card may report\nup to 65535 blocks. A block_count above 8192 (MS_MAX_ZONES *\nMS_BLOCKS_IN_ZONE) lets the pba index reach 16. That writes past\nfree_block_count[] and corrupts struct msb_data. A larger count runs the\ninit loop past the end too.\n\nA real Memory Stick has at most 16 zones. So it has at most 8192 blocks.\nmsb_ftl_initialize() now rejects a card that reports more than\nMS_MAX_ZONES * MS_BLOCKS_IN_ZONE blocks." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/memstick/core/ms_block.c" ], "versions": [ { "version": "0ab30494bc4f3bc1ea4659b7c5d97c5218554a63", "lessThan": "a4b9961efe8640f50800811b4a2b2046b3dc2ccc", "status": "affected", "versionType": "git" }, { "version": "0ab30494bc4f3bc1ea4659b7c5d97c5218554a63", "lessThan": "8937b11f1c3896e066c3fb07387ba17bc8c50b8a", "status": "affected", "versionType": "git" }, { "version": "0ab30494bc4f3bc1ea4659b7c5d97c5218554a63", "lessThan": "f1c675ecf6e5ad02722f0019f729d8bb588d502e", "status": "affected", "versionType": "git" }, { "version": "0ab30494bc4f3bc1ea4659b7c5d97c5218554a63", "lessThan": "d5db3439ee8d1c165a09a47e984c4ba508c130df", "status": "affected", "versionType": "git" }, { "version": "0ab30494bc4f3bc1ea4659b7c5d97c5218554a63", "lessThan": "b86666ac4009a252501cc17242582a7ec9ed976e", "status": "affected", "versionType": "git" }, { "version": "0ab30494bc4f3bc1ea4659b7c5d97c5218554a63", "lessThan": "39151f0708c84221e94cdd6aa070aba5d7cb1c01", "status": "affected", "versionType": "git" }, { "version": "0ab30494bc4f3bc1ea4659b7c5d97c5218554a63", "lessThan": "47f0c7d856c67c9935546d2644f18c0d0131b449", "status": "affected", "versionType": "git" }, { "version": "0ab30494bc4f3bc1ea4659b7c5d97c5218554a63", "lessThan": "718178f524b98bc920d74bc771aed823c8b81425", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/memstick/core/ms_block.c" ], "versions": [ { "version": "3.12", "status": "affected" }, { "version": "0", "lessThan": "3.12", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.261", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.212", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.178", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.97", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2-rc4", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.12", "versionEndExcluding": "5.10.261" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.12", "versionEndExcluding": "5.15.212" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.12", "versionEndExcluding": "6.1.178" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.12", "versionEndExcluding": "6.6.145" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.12", "versionEndExcluding": "6.12.97" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.12", "versionEndExcluding": "6.18.40" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.12", "versionEndExcluding": "7.1.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.12", "versionEndExcluding": "7.2-rc4" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/a4b9961efe8640f50800811b4a2b2046b3dc2ccc" }, { "url": "https://git.kernel.org/stable/c/8937b11f1c3896e066c3fb07387ba17bc8c50b8a" }, { "url": "https://git.kernel.org/stable/c/f1c675ecf6e5ad02722f0019f729d8bb588d502e" }, { "url": "https://git.kernel.org/stable/c/d5db3439ee8d1c165a09a47e984c4ba508c130df" }, { "url": "https://git.kernel.org/stable/c/b86666ac4009a252501cc17242582a7ec9ed976e" }, { "url": "https://git.kernel.org/stable/c/39151f0708c84221e94cdd6aa070aba5d7cb1c01" }, { "url": "https://git.kernel.org/stable/c/47f0c7d856c67c9935546d2644f18c0d0131b449" }, { "url": "https://git.kernel.org/stable/c/718178f524b98bc920d74bc771aed823c8b81425" } ], "title": "memstick: ms_block: reject a card that reports too many blocks", "x_generator": { "engine": "bippy-1.2.0" } } } }