Is CVE-2015-7837 being actively exploited?

CVE-2015-7837 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2015-7837?

CVE-2015-7837 has a CVSS 3.0 base score of 5.5 (MEDIUM).

CVE-2015-7837

MEDIUM · CVSS 5.5EPSS 0.4%EU EUVD

The Linux kernel, as used in Red Hat Enterprise Linux 7, kernel-rt, and Enterprise MRG 2 and when booted with UEFI Secure Boot enabled, allows local users to bypass intended securelevel/secureboot restrictions by leveraging improper handling of secure_boot flag across kexec reboot.

Key facts

CVSS score: 5.5 (v3.0)
Severity: MEDIUM
CVSS vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Weakness (CWE): CWE-254
EPSS score: 0.4% (33th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2015-7735)
Published: September 19, 2017
NVD last modified: June 17, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2015-7735 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.

View on the EU Vulnerability Database

Affected products

redhat / enterprise linux
redhat / enterprise linux
redhat / enterprise linux
redhat / enterprise linux desktop
redhat / enterprise linux server aus
redhat / enterprise linux server aus
redhat / enterprise linux workstation
redhat / enterprise mrg
redhat / kernel-rt

Certified products that may be affected

7 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

Red Hat Enterprise Linux 7 NSS Cryptographic Module - Red Hat®, Inc. - FIPS 140 4498 - historical
Red Hat Enterprise Linux 7 Kernel Crypto API Cryptographic Module - Red Hat®, Inc. - FIPS 140 3939 - historical
Red Hat Enterprise Linux 7 OpenSSH Server Cryptographic Module - Red Hat®, Inc. - FIPS 140 3891 - historical
Red Hat Enterprise Linux 7 OpenSSH Client Cryptographic Module - Red Hat®, Inc. - FIPS 140 3892 - historical
Red Hat Enterprise Linux 7 OpenSSL Cryptographic Module - Red Hat®, Inc. - FIPS 140 3867 - historical

See all 7 in the Security Certifications Explorer.

References

http://rhn.redhat.com/errata/RHSA-2015-2152.html(Vendor Advisory)
http://rhn.redhat.com/errata/RHSA-2015-2411.html(Vendor Advisory)
http://www.openwall.com/lists/oss-security/2015/10/15/6(Mailing List, Third Party Advisory)
http://www.securityfocus.com/bid/77097(Third Party Advisory, VDB Entry)
https://bugzilla.redhat.com/show_bug.cgi?id=1272472(Issue Tracking, Vendor Advisory)
https://github.com/mjg59/linux/commit/4b2b64d5a6ebc84214755ebccd599baef7c1b798(Issue Tracking, Third Party Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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