{"dataType":"CVE_RECORD","dataVersion":"5.1","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":"2025-05-04T12:40:58.929Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2025-05-04T12:40:58.929Z"},"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"}]},{"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:*:*:*:*:*:*:*:*","versionStartIncluding":"5.9","versionEndExcluding":"5.11.21"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.9","versionEndExcluding":"5.12.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.9","versionEndExcluding":"5.13"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.7.15"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8.1"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/f4d28d8b9b0e7c4ae04214b8d7e0b0466ec6bcaf"},{"url":"https://git.kernel.org/stable/c/9625b00cac6630479c0ff4b9fafa88bee636e1f0"},{"url":"https://git.kernel.org/stable/c/f73b29819c6314c0ba8b7d5892dfb03487424bee"},{"url":"https://git.kernel.org/stable/c/75ed985bd6c8ac1d4e673e93ea9d96c9908c1d37"},{"url":"https://git.kernel.org/stable/c/5880afefe0cb9b2d5e801816acd58bfe91a96981"},{"url":"https://git.kernel.org/stable/c/7b6552719c0ccbbea29dde4be141da54fdb5877e"},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