CVE-2021-47055

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux1c9f9125892a43901438bf704ada6b7019e2a884 < f4d28d8b9b0e7c4ae04214b8d7e0b0466ec6bcafaffected
LinuxLinux583d42400532fbd6228b0254d7c732b771e4750d < 9625b00cac6630479c0ff4b9fafa88bee636e1f0affected
LinuxLinux389c74c218d3b182e9cd767e98cee0e0fd0dabaa < f73b29819c6314c0ba8b7d5892dfb03487424beeaffected
LinuxLinuxab1a602a9cea98aa37b2e6851b168d2a2633a58d < 75ed985bd6c8ac1d4e673e93ea9d96c9908c1d37affected
LinuxLinux9a53e8bd59d9f070505e51d3fd19606a270e6b93 < 5880afefe0cb9b2d5e801816acd58bfe91a96981affected
LinuxLinuxf7e6b19bc76471ba03725fe58e0c218a3d6266c3 < 7b6552719c0ccbbea29dde4be141da54fdb5877eaffected
LinuxLinuxf7e6b19bc76471ba03725fe58e0c218a3d6266c3 < 077259f5e777c3c8821f6b41dee709fcda27306baffected
LinuxLinuxf7e6b19bc76471ba03725fe58e0c218a3d6266c3 < a08799d3e8c8088640956237c183f83463c39668affected
LinuxLinuxf7e6b19bc76471ba03725fe58e0c218a3d6266c3 < 1e97743fd180981bef5f01402342bb54bf1c6366affected
LinuxLinux36a8b2f49235e63ab3f901fe12e1b6732f075c2eaffected
LinuxLinuxeb3d82abc335624a5e8ecfb75aba0b684e2dc4dbaffected
LinuxLinux4.4.233 < 4.4.269affected
LinuxLinux4.9.233 < 4.9.269affected
LinuxLinux4.14.194 < 4.14.233affected
LinuxLinux4.19.139 < 4.19.191affected
LinuxLinux5.4.58 < 5.4.119affected
LinuxLinux5.7.15 < 5.8affected
LinuxLinux5.8.1 < 5.9affected
LinuxLinux5.9affected
LinuxLinux0 < 5.9unaffected
LinuxLinux4.4.269 <= 4.4.*unaffected
LinuxLinux4.9.269 <= 4.9.*unaffected
LinuxLinux4.14.233 <= 4.14.*unaffected
LinuxLinux4.19.191 <= 4.19.*unaffected
LinuxLinux5.4.119 <= 5.4.*unaffected
LinuxLinux5.10.37 <= 5.10.*unaffected
LinuxLinux5.11.21 <= 5.11.*unaffected
LinuxLinux5.12.4 <= 5.12.*unaffected
LinuxLinux5.13 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

CVE Program Container

Additional References

References