CVE-2021-47055
Last modified
CVE-2021-47055 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. 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. EPSS estimates a 0.20% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| 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 |
References
Timeline
- Published
- Last Modified
- Status
- Analyzed
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