CVE-2021-47055
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2021
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
mtd: require write permissions for locking and badblock ioctls
In the Linux kernel, the following vulnerability has been resolved: mtd: require write permissions for locking and badblock ioctls MEMLOCK, MEMUNLOCK and OTPLOCK modify protection bits. Thus require write permission. Depending on the hardware MEMLOCK might even be write-once, e.g. for SPI-NOR flashes with their WP# tied to GND. OTPLOCK is always write-once. MEMSETBADBLOCK modifies the bad block table.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 1c9f9125892a43901438bf704ada6b7019e2a884 | affected | git | f4d28d8b9b0e7c4ae04214b8d7e0b0466ec6bcaf | Unavailable | None listed |
| 583d42400532fbd6228b0254d7c732b771e4750d | affected | git | 9625b00cac6630479c0ff4b9fafa88bee636e1f0 | Unavailable | None listed |
| 389c74c218d3b182e9cd767e98cee0e0fd0dabaa | affected | git | f73b29819c6314c0ba8b7d5892dfb03487424bee | Unavailable | None listed |
| ab1a602a9cea98aa37b2e6851b168d2a2633a58d | affected | git | 75ed985bd6c8ac1d4e673e93ea9d96c9908c1d37 | Unavailable | None listed |
| 9a53e8bd59d9f070505e51d3fd19606a270e6b93 | affected | git | 5880afefe0cb9b2d5e801816acd58bfe91a96981 | Unavailable | None listed |
| f7e6b19bc76471ba03725fe58e0c218a3d6266c3 | affected | git | 7b6552719c0ccbbea29dde4be141da54fdb5877e | Unavailable | None listed |
| f7e6b19bc76471ba03725fe58e0c218a3d6266c3 | affected | git | 077259f5e777c3c8821f6b41dee709fcda27306b | Unavailable | None listed |
| f7e6b19bc76471ba03725fe58e0c218a3d6266c3 | affected | git | a08799d3e8c8088640956237c183f83463c39668 | Unavailable | None listed |
| f7e6b19bc76471ba03725fe58e0c218a3d6266c3 | affected | git | 1e97743fd180981bef5f01402342bb54bf1c6366 | Unavailable | None listed |
| 36a8b2f49235e63ab3f901fe12e1b6732f075c2e | affected | git | Unavailable | Unavailable | None listed |
| eb3d82abc335624a5e8ecfb75aba0b684e2dc4db | affected | git | Unavailable | Unavailable | None listed |
| 4.4.233 | affected | semver | 4.4.269 | Unavailable | None listed |
| 4.9.233 | affected | semver | 4.9.269 | Unavailable | None listed |
| 4.14.194 | affected | semver | 4.14.233 | Unavailable | None listed |
| 4.19.139 | affected | semver | 4.19.191 | Unavailable | None listed |
| 5.4.58 | affected | semver | 5.4.119 | Unavailable | None listed |
| 5.7.15 | affected | semver | 5.8 | Unavailable | None listed |
| 5.8.1 | affected | semver | 5.9 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 5.9 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 5.9 | Unavailable | None listed |
| 4.4.269 | unaffected | semver | Unavailable | 4.4.* | None listed |
| 4.9.269 | unaffected | semver | Unavailable | 4.9.* | None listed |
| 4.14.233 | unaffected | semver | Unavailable | 4.14.* | None listed |
| 4.19.191 | unaffected | semver | Unavailable | 4.19.* | None listed |
| 5.4.119 | unaffected | semver | Unavailable | 5.4.* | None listed |
| 5.10.37 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.11.21 | unaffected | semver | Unavailable | 5.11.* | None listed |
| 5.12.4 | unaffected | semver | Unavailable | 5.12.* | None listed |
| 5.13 | unaffected | original_commit_for_fix | Unavailable | * | None listed |