CVE-2015-0239
Description
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.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| debian | bookworm | fixed | 3.16.7-ckt4-2 |
| debian | bullseye | fixed | 3.16.7-ckt4-2 |
| debian | forky | fixed | 3.16.7-ckt4-2 |
| debian | sid | fixed | 3.16.7-ckt4-2 |
| debian | trixie | fixed | 3.16.7-ckt4-2 |
| rhel | 6.0 | affected | |
| ubuntu | 12.04 | affected | |
| ubuntu | 14.04 | affected | |
| ubuntu | 14.10 | affected | |
| debian | 7.0 | affected | |
| debian | 8.0 | affected | |
| linux-kernel | affected | 3.18.5 |
References
- https://www.suse.com/security/cve/CVE-2015-0239.html
- 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
- http://rhn.redhat.com/errata/RHSA-2015-1272.html
- http://www.debian.org/security/2015/dsa-3170
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.18.5
- http://www.mandriva.com/security/advisories?name=MDVSA-2015:058
- http://www.openwall.com/lists/oss-security/2015/01/27/6
- http://www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.html
- http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html
- http://www.securityfocus.com/bid/72842
- http://www.ubuntu.com/usn/USN-2513-1
- http://www.ubuntu.com/usn/USN-2514-1
- http://www.ubuntu.com/usn/USN-2515-1
- http://www.ubuntu.com/usn/USN-2516-1
- http://www.ubuntu.com/usn/USN-2517-1
- http://www.ubuntu.com/usn/USN-2518-1
- https://bugzilla.redhat.com/show_bug.cgi?id=1186448
- https://github.com/torvalds/linux/commit/f3747379accba8e95d70cec0eae0582c8c182050
- https://security-tracker.debian.org/tracker/CVE-2015-0239
CWEs
CWE-269
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.