Medium severity · published Sep 19, 2017
CVE-2015-7837
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…
5.5
CVSS
0.4%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 35% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
EL
Enterprise Linux · Redhat
7.0; 7.2; 7.3 · source: NVD
EL
Enterprise Linux Desktop · Redhat
7.0 · source: NVD
EL
Enterprise Linux Server Aus · Redhat
7.3; 7.4 · source: NVD
EL
Enterprise Linux Workstation · Redhat
7.0 · source: NVD
EM
Enterprise Mrg · Redhat
2.0 · source: NVD
KE
Kernel-rt · Redhat
7.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2015-7837
CVE.org
https://www.cve.org/CVERecord?id=CVE-2015-7837
Vendor Advisory
http://rhn.redhat.com/errata/RHSA-2015-2152.html
Vendor Advisory
http://rhn.redhat.com/errata/RHSA-2015-2411.html
Mailing List
http://www.openwall.com/lists/oss-security/2015/10/15/6
Third Party Advisory
http://www.securityfocus.com/bid/77097
Issue Tracking
https://bugzilla.redhat.com/show_bug.cgi?id=1272472
Issue Tracking
https://github.com/mjg59/linux/commit/4b2b64d5a6ebc84214755ebccd599baef7c1b798
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