Vulnerability in Linux

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.

Published · last modified .

CVSS v3 metric

CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H.

EPSS exploit prediction

EPSS: 0.002 (8.7th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 9th percentile — 8.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2021-47055: held from 0.002 to 0.002.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000

Affected products

  • Linux — versions 36a8b2f49235e63ab3f901fe12e1b6732f075c2e, 5.12.4, f7e6b19bc76471ba03725fe58e0c218a3d6266c3
  • Linux Kernel

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2021-47055?
CVE-2021-47055 is a high-severity vulnerability in Linux, classified under Improper Locking. CVSS score: 7.1/10. Published 2024-02-29.
How severe is CVE-2021-47055?
High severity. CVSS v3 base score is 7.1 out of 10.