CVE-2021-47055

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.

• linux linux kernel (>= 4.4.233 < 4.4.269) • linux linux kernel (>= 4.9.233 < 4.9.269) • linux linux kernel (>= 4.14.194 < 4.14.233) • linux linux kernel (>= 4.19.139 < 4.19.191) • linux linux kernel (>= 5.4.58 < 5.4.119) • linux linux kernel (>= 5.9 < 5.10.37) • linux linux kernel (>= 5.11 < 5.11.21) • linux linux kernel (>= 5.12 < 5.12.4)