Vulnerability Report

CVE-2015-8539

Title: Suse Linux Enterprise Real Time Extension Auth Bypass

Auth Bypass

Proof Of Concept

No public PoC currently indexed for CVE-2015-8539.

CWE Category CWE-269

Published Date Feb 08, 2016

Modified Date Jun 17, 2026

Exploit Status Not Found

Score 7.8 CVSS v3.1

Exploit Probability (EPSS)

0.42%

Vulnerability Summary

CVE-2015-8539: The KEYS subsystem in the Linux kernel before 4.4 allows local users to gain privileges or cause a denial of service (BUG) via crafted keyctl commands that negatively instantiate a key, related to security/keys/encrypted-keys/encrypted.c, security/keys/trusted.c, and security/keys/user_defined.c.

Impacted Vendors

Reference Links

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=096fe9eaea40a17e125569f9e657e34cdb6d73bd http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00007.html http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00008.html http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00009.html http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00011.html http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00017.html http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00018.html http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00019.html http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00020.html http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00021.html http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00022.html http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00034.html http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00094.html http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00045.html http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00000.html http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00038.html http://www.openwall.com/lists/oss-security/2015/12/09/1 https://access.redhat.com/errata/RHSA-2018:0151 https://access.redhat.com/errata/RHSA-2018:0152 https://access.redhat.com/errata/RHSA-2018:0181 https://bugzilla.redhat.com/show_bug.cgi?id=1284450 https://github.com/torvalds/linux/commit/096fe9eaea40a17e125569f9e657e34cdb6d73bd https://usn.ubuntu.com/3798-1/ https://usn.ubuntu.com/3798-2/ http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=096fe9eaea40a17e125569f9e657e34cdb6d73bd http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00007.html http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00008.html http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00009.html http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00011.html http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00017.html http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00018.html http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00019.html http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00020.html http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00021.html http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00022.html http://lists.opensuse.org/opensuse-security-announce/2016-02/msg00034.html http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00094.html http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00045.html http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00000.html http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00038.html http://www.openwall.com/lists/oss-security/2015/12/09/1 https://access.redhat.com/errata/RHSA-2018:0151 https://access.redhat.com/errata/RHSA-2018:0152 https://access.redhat.com/errata/RHSA-2018:0181 https://bugzilla.redhat.com/show_bug.cgi?id=1284450 https://github.com/torvalds/linux/commit/096fe9eaea40a17e125569f9e657e34cdb6d73bd https://usn.ubuntu.com/3798-1/ https://usn.ubuntu.com/3798-2/

CVSS v3.1

Source Entity [email protected]

Severity HIGH

7.8

Attack Vector

LOCAL

Complexity

LOW

Privileges

N/A

Interaction

NONE

Confidentiality

N/A

Integrity

N/A

Availability

N/A

Scope

UNCHANGED

RAW VECTOR CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v2.0

Source Entity [email protected]

Severity HIGH

7.2

Access Vector

N/A

Authentication

N/A

RAW VECTOR AV:L/AC:L/Au:N/C:C/I:C/A:C

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2015-8539 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

June 17, 2026 MODIFIED

Vulnerability data updated via NVD.

May 06, 2026 MODIFIED

Vulnerability data updated via NVD.

April 12, 2025 MODIFIED

Vulnerability data or affected products updated.

February 08, 2016 PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector LOCAL

Complexity LOW

Privileges N/A

Interaction NONE

CVSS Vector String


                                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected Stack

No specific products linked.