CVE-2023-6240

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

MEDIUM
6.5
CVSS Score
Published: February 4, 2024 at 02:11 PM UTC
Updated: June 17, 2026 at 06:50 AM UTC
2 products affected across 2 vendorsLinux KernelEnterprise Linux

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Severity
MEDIUM6.5
Exploit prediction
EPSS 1.0%
SSVC
PoC

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

All versions
Vendor states this is fixed in 0:4.18.0-553.5.1.el8_10 (unaffected)
Vendor states this is fixed in 0:4.18.0-553.5.1.rt7.346.el8_10 (unaffected)
Vendor states this is fixed in 0:5.14.0-284.62.1.el9_2 (unaffected)
Vendor states this is fixed in 0:5.14.0-284.62.1.rt14.347.el9_2 (unaffected)
Vendor states this is fixed in 0:5.14.0-427.16.1.el9_4 (unaffected)
Vendor states this is fixed in 0:5.14.0-70.101.1.el9_0 (unaffected)
Vendor states this is fixed in 0:5.14.0-70.101.1.rt21.173.el9_0 (unaffected)
Vendor states this is fixed in 6 (unknown)
Vendor states this is fixed in 7 (unknown)

References (12)

SSVC — Action Prioritization

SSVCPoCNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUMredhat
Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-203

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