{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2021-47055", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-02-29T22:33:44.293Z", "datePublished": "2024-02-29T22:37:30.071Z", "dateUpdated": "2026-05-23T15:19:10.230Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-23T15:19:10.230Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmtd: require write permissions for locking and badblock ioctls\n\nMEMLOCK, MEMUNLOCK and OTPLOCK modify protection bits. Thus require\nwrite permission. Depending on the hardware MEMLOCK might even be\nwrite-once, e.g. for SPI-NOR flashes with their WP# tied to GND. OTPLOCK\nis always write-once.\n\nMEMSETBADBLOCK modifies the bad block table." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/mtd/mtdchar.c" ], "versions": [ { "version": "1c9f9125892a43901438bf704ada6b7019e2a884", "lessThan": "f4d28d8b9b0e7c4ae04214b8d7e0b0466ec6bcaf", "status": "affected", "versionType": "git" }, { "version": "583d42400532fbd6228b0254d7c732b771e4750d", "lessThan": "9625b00cac6630479c0ff4b9fafa88bee636e1f0", "status": "affected", "versionType": "git" }, { "version": "389c74c218d3b182e9cd767e98cee0e0fd0dabaa", "lessThan": "f73b29819c6314c0ba8b7d5892dfb03487424bee", "status": "affected", "versionType": "git" }, { "version": "ab1a602a9cea98aa37b2e6851b168d2a2633a58d", "lessThan": "75ed985bd6c8ac1d4e673e93ea9d96c9908c1d37", "status": "affected", "versionType": "git" }, { "version": "9a53e8bd59d9f070505e51d3fd19606a270e6b93", "lessThan": "5880afefe0cb9b2d5e801816acd58bfe91a96981", "status": "affected", "versionType": "git" }, { "version": "f7e6b19bc76471ba03725fe58e0c218a3d6266c3", "lessThan": "7b6552719c0ccbbea29dde4be141da54fdb5877e", "status": "affected", "versionType": "git" }, { "version": "f7e6b19bc76471ba03725fe58e0c218a3d6266c3", "lessThan": "077259f5e777c3c8821f6b41dee709fcda27306b", "status": "affected", "versionType": "git" }, { "version": "f7e6b19bc76471ba03725fe58e0c218a3d6266c3", "lessThan": "a08799d3e8c8088640956237c183f83463c39668", "status": "affected", "versionType": "git" }, { "version": "f7e6b19bc76471ba03725fe58e0c218a3d6266c3", "lessThan": "1e97743fd180981bef5f01402342bb54bf1c6366", "status": "affected", "versionType": "git" }, { "version": "36a8b2f49235e63ab3f901fe12e1b6732f075c2e", "status": "affected", "versionType": "git" }, { "version": "eb3d82abc335624a5e8ecfb75aba0b684e2dc4db", "status": "affected", "versionType": "git" }, { "version": "4.4.233", "lessThan": "4.4.269", "status": "affected", "versionType": "semver" }, { "version": "4.9.233", "lessThan": "4.9.269", "status": "affected", "versionType": "semver" }, { "version": "4.14.194", "lessThan": "4.14.233", "status": "affected", "versionType": "semver" }, { "version": "4.19.139", "lessThan": "4.19.191", "status": "affected", "versionType": "semver" }, { "version": "5.4.58", "lessThan": "5.4.119", "status": "affected", "versionType": "semver" }, { "version": "5.7.15", "lessThan": "5.8", "status": "affected", "versionType": "semver" }, { "version": "5.8.1", "lessThan": "5.9", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/mtd/mtdchar.c" ], "versions": [ { "version": "5.9", "status": "affected" }, { "version": "0", "lessThan": "5.9", "status": "unaffected", "versionType": "semver" }, { "version": "4.4.269", "lessThanOrEqual": "4.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.9.269", "lessThanOrEqual": "4.9.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.14.233", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.191", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.119", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.37", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.11.21", "lessThanOrEqual": "5.11.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.12.4", "lessThanOrEqual": "5.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.13", "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": "4.4.233", "versionEndExcluding": "4.4.269" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9.233", "versionEndExcluding": "4.9.269" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14.194", "versionEndExcluding": "4.14.233" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19.139", "versionEndExcluding": "4.19.191" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4.58", "versionEndExcluding": "5.4.119" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "5.10.37" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", 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