CVE-2023-6240

Kernel: marvin vulnerability side-channel leakage in the rsa decryption operation

State: Published
Severity: 6.5 Medium
Published: Feb 4, 2024
Updated: Nov 8, 2025
Reserved: Nov 21, 2023

Description

A Marvin vulnerability side-channel leakage was found in the RSA decryption operation in the Linux Kernel. This issue may allow a network attacker to decrypt ciphertexts or forge signatures, limiting the services that use that private key.

Scores

CVSS	Score	Vector	Source
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N	redhat

Weaknesses

CWE-203 Observable Discrepancy

Affected Products

Product	Versions
Red Hat Enterprise Linux 8Red Hat	0:4.18.0-553.5.1.rt7.346.el8_10 and laterNot affected
Red Hat Enterprise Linux 8Red Hat	0:4.18.0-553.5.1.el8_10 and laterNot affected
Red Hat Enterprise Linux 9Red Hat	0:5.14.0-427.16.1.el9_4 and laterNot affected
Red Hat Enterprise Linux 9Red Hat	0:5.14.0-427.16.1.el9_4 and laterNot affected
Red Hat Enterprise Linux 9.0 Extended Update SupportRed Hat	0:5.14.0-70.101.1.el9_0 and laterNot affected
Red Hat Enterprise Linux 9.0 Extended Update SupportRed Hat	0:5.14.0-70.101.1.rt21.173.el9_0 and laterNot affected
Red Hat Enterprise Linux 9.2 Extended Update SupportRed Hat	0:5.14.0-284.62.1.el9_2 and laterNot affected
Red Hat Enterprise Linux 9.2 Extended Update SupportRed Hat	0:5.14.0-284.62.1.rt14.347.el9_2 and laterNot affected
Red Hat Enterprise Linux 6Red Hat
Red Hat Enterprise Linux 7Red Hat
Red Hat Enterprise Linux 7Red Hat
Red Hat Enterprise Linux 9Red Hat

References

RHSA-2024:1881vendor-advisory
RHSA-2024:1882vendor-advisory
RHSA-2024:2758vendor-advisory
RHSA-2024:3414vendor-advisory
RHSA-2024:3421vendor-advisory
RHSA-2024:3618vendor-advisory
RHSA-2024:3627vendor-advisory
https://access.redhat.com/security/cve/CVE-2023-6240vdb-entry
RHBZ#2250843issue-tracking
https://people.redhat.com/~hkario/marvin/
https://securitypitfalls.wordpress.com/2023/10/16/experiment-with-side-channel-attacks-yourself/
https://security.netapp.com/advisory/ntap-20240628-0002/

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