Vulnerability in Linux Kernel
CVE-2023-6240
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N.
EPSS exploit prediction
EPSS: 0.010 (60.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 60th percentile — 60.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.010 · newest: 0.010 · change: 0.000
Affected products
- Linux Kernel
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8 — versions 0:4.18.0-553.5.1.rt7.346.el8_10, 0:4.18.0-553.5.1.el8_10
- Red Hat Enterprise Linux 9 — versions 0:5.14.0-427.16.1.el9_4
- Red Hat Enterprise Linux 9.0 Extended Update Support — versions 0:5.14.0-70.101.1.el9_0, 0:5.14.0-70.101.1.rt21.173.el9_0
- Red Hat Enterprise Linux 9.2 Extended Update Support — versions 0:5.14.0-284.62.1.el9_2, 0:5.14.0-284.62.1.rt14.347.el9_2
- Red Hat Enterprise Linux — versions 7.0, 8.0, 9.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- access.redhat.com/errata/RHSA-2024:1881 (vendor-advisory)
- access.redhat.com/errata/RHSA-2024:1882 (vendor-advisory)
- access.redhat.com/errata/RHSA-2024:2758 (vendor-advisory)
- access.redhat.com/errata/RHSA-2024:3414 (vendor-advisory)
- access.redhat.com/errata/RHSA-2024:3421 (vendor-advisory)
- access.redhat.com/errata/RHSA-2024:3618 (vendor-advisory)
- access.redhat.com/errata/RHSA-2024:3627 (vendor-advisory)
- access.redhat.com/security/cve/CVE-2023-6240 (Third Party Advisory, vdb-entry)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking, Issue Tracking)
- people.redhat.com/~hkario/marvin/ (Third Party Advisory)
Frequently asked questions
- What is CVE-2023-6240?
- CVE-2023-6240 is a medium-severity vulnerability in Linux Kernel, classified under Observable Discrepancy. CVSS score: 6.5/10. Published 2024-02-04.
- How severe is CVE-2023-6240?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2023-6240 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.