Red Hat: CVE-2021-47055: kernel: mtd: require write permissions for locking and badblock ioctls (Multiple Advisories)
Description
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.
Solution(s)
- redhat-upgrade-kernel
- redhat-upgrade-kernel-rt
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