CVE Vulnerabilities

CVE-2021-35039

Improper Verification of Cryptographic Signature

Published: Jul 07, 2021 | Modified: May 16, 2023
CVSS 3.x
7.8
HIGH
Source:
NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS 2.x
6.9 MEDIUM
AV:L/AC:M/Au:N/C:C/I:C/A:C
RedHat/V2
RedHat/V3
Ubuntu

kernel/module.c in the Linux kernel before 5.12.14 mishandles Signature Verification, aka CID-0c18f29aae7c. Without CONFIG_MODULE_SIG, verification that a kernel module is signed, for loading via init_module, does not occur for a module.sig_enforce=1 command-line argument.

Weakness

The product does not verify, or incorrectly verifies, the cryptographic signature for data.

Affected Software

Name Vendor Start Version End Version
Linux_kernel Linux 4.15 (including) 4.19.196 (excluding)
Linux_kernel Linux 4.20 (including) 5.4.129 (excluding)
Linux_kernel Linux 5.5 (including) 5.10.47 (excluding)
Linux_kernel Linux 5.11 (including) 5.12.14 (excluding)

References