Is CVE-2015-0239 being actively exploited?

CVE-2015-0239 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2015-0239?

CVE-2015-0239 has a CVSS 2.0 base score of 4.4 (MEDIUM).

CVE-2015-0239

MEDIUM · CVSS 4.4EPSS 0.6%EU EUVD

The em_sysenter function in arch/x86/kvm/emulate.c in the Linux kernel before 3.18.5, when the guest OS lacks SYSENTER MSR initialization, allows guest OS users to gain guest OS privileges or cause a denial of service (guest OS crash) by triggering use of a 16-bit code segment for emulation of a SYSENTER instruction.

Key facts

CVSS score: 4.4 (v2.0)
Severity: MEDIUM
CVSS vector: AV:L/AC:M/Au:N/C:P/I:P/A:P
Weakness (CWE): CWE-269
EPSS score: 0.6% (50th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2015-0261)
Published: March 2, 2015
NVD last modified: June 17, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2015-0261 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.

View on the EU Vulnerability Database

Affected products

canonical / ubuntu linux
canonical / ubuntu linux
canonical / ubuntu linux
debian / debian linux
debian / debian linux
linux / linux kernel
oracle / linux
oracle / linux
redhat / enterprise linux desktop
redhat / enterprise linux server
redhat / enterprise linux workstation

Certified products that may be affected

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

Oracle Linux 7 NSS Cryptographic Module - Oracle Corporation - FIPS 140 4586 - historical
Oracle Linux 7 Libreswan Cryptographic Module - Oracle Corporation - FIPS 140 4266 - historical
Oracle Linux 7 OpenSSH Client Cryptographic Module - Oracle Corporation - FIPS 140 4206 - historical
Oracle Linux 7 OpenSSH Server Cryptographic Module - Oracle Corporation - FIPS 140 4176 - historical
Oracle Linux 7 Unbreakable Enterprise Kernel (UEK 6) Cryptographic Module - Oracle Corporation - FIPS 140 4169 - historical

See all 23 in the Security Certifications Explorer.

References

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=f3747379accba8e95d70cec0eae0582c8c182050
http://permalink.gmane.org/gmane.linux.kernel.commits.head/502245(Broken Link)
http://rhn.redhat.com/errata/RHSA-2015-1272.html(Third Party Advisory)
http://www.debian.org/security/2015/dsa-3170(Third Party Advisory)
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.18.5(Release Notes, Vendor Advisory)
http://www.mandriva.com/security/advisories?name=MDVSA-2015:058(Third Party Advisory)
http://www.openwall.com/lists/oss-security/2015/01/27/6(Exploit, Mailing List, Third Party Advisory)
http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html(Third Party Advisory)
http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html(Third Party Advisory)
http://www.securityfocus.com/bid/72842(Third Party Advisory, VDB Entry)
http://www.ubuntu.com/usn/USN-2513-1(Third Party Advisory)
http://www.ubuntu.com/usn/USN-2514-1(Third Party Advisory)
http://www.ubuntu.com/usn/USN-2515-1(Third Party Advisory)
http://www.ubuntu.com/usn/USN-2516-1(Third Party Advisory)
http://www.ubuntu.com/usn/USN-2517-1(Third Party Advisory)
http://www.ubuntu.com/usn/USN-2518-1(Third Party Advisory)
https://bugzilla.redhat.com/show_bug.cgi?id=1186448(Issue Tracking, Third Party Advisory)
https://github.com/torvalds/linux/commit/f3747379accba8e95d70cec0eae0582c8c182050(Patch, Third Party Advisory)

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

Query CVEs from your AI assistant

The CVE/NVD Explorer brain answers CVE questions directly inside Claude, ChatGPT, or any MCP assistant — always up to date, no setup. Add it once and stop pasting advisories into chat.

Add the CVE brain