PT-2024-11145 · Linux+6 · Linux Kernel+6
Michael Walle
·
Published
2021-03-28
·
Updated
2025-01-09
·
CVE-2021-47055
CVSS v3.1
5.5
Medium
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
The issue concerns the requirement of write permissions for locking and badblock ioctls in the Linux kernel. Specifically,
MEMLOCK, MEMUNLOCK, and OTPLOCK modify protection bits and thus require write permission. Depending on the hardware, MEMLOCK might even be write-once, for example, for SPI-NOR flashes with their WP# tied to GND. OTPLOCK is always write-once. MEMSETBADBLOCK modifies the bad block table.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Improper Locking
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Weakness Enumeration
Related Identifiers
Affected Products
Almalinux
Centos
Linux Kernel
Red Hat
Rocky Linux
Suse
Ubuntu