CVE-2021-47055
High
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.
SeverityHigh
CVSS7.1
Exploit probability—
Product
Linux Kernel
PublishedFeb 29, 2024
First seenFeb 29, 2024
How to fix
Update
- linux linux_kernel4.4.269, 4.9.269, 4.14.233, 4.19.191, 5.4.119, 5.10.37, 5.11.21, 5.12.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 4.4.233 ≤ v < 4.4.269, 4.9.233 ≤ v < 4.9.269, 4.14.194 ≤ v < 4.14.233, 4.19.139 ≤ v < 4.19.191, 5.4.58 ≤ v < 5.4.119, 5.9 ≤ v < 5.10.37, 5.11 ≤ v < 5.11.21, 5.12 ≤ v < 5.12.4 | 4.4.269, 4.9.269, 4.14.233, 4.19.191, 5.4.119, 5.10.37, 5.11.21, 5.12.4 |
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