VULNERABILITY INTELLIGENCE

CVE-2021-47055

CVSS score7.1 HIGH
EPSS probability0.20%
CISA KEVNot currently listed
Published2024-02-29
Last modified2026-08-04
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

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.

Weakness classification

  • nvd@nist.gov: CWE-667

Primary references