CVE-2015-2666

Name: CVE-2015-2666
Creator: NVD / NIST
Published: 2015-05-27T10:59:04.813+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 0.42%

Last modified Jun 17, 2026

CVE-2015-2666 is a vulnerability of currently unknown severity. Stack-based buffer overflow in the get_matching_model_microcode function in arch/x86/kernel/cpu/microcode/intel_early.c in the Linux kernel before 4.0 allows context-dependent attackers to gain privileges by constructing a crafted microcode header and leveraging root privileges for write access to the initrd.. EPSS estimates a 0.42% chance of exploitation in the next 30 days.

Description

Stack-based buffer overflow in the get_matching_model_microcode function in arch/x86/kernel/cpu/microcode/intel_early.c in the Linux kernel before 4.0 allows context-dependent attackers to gain privileges by constructing a crafted microcode header and leveraging root privileges for write access to the initrd.

Metrics

EPSS Probability

0.42%

33.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-119

Affected Software

Vendor	Product	Versions
Linux	Linux Kernel	>= 3.9, < 3.10.83
Linux	Linux Kernel	>= 3.11, < 3.12.40
Linux	Linux Kernel	>= 3.13, < 3.14.47
Linux	Linux Kernel	>= 3.15, < 3.16.35
Linux	Linux Kernel	>= 3.17, < 3.18.19
Fedoraproject	Fedora	21

References

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=f84598bd7c851f8b0bf8cd0d7c3be0d73c432ff4Broken Link
http://lists.fedoraproject.org/pipermail/package-announce/2015-March/153329.htmlThird Party Advisory
http://rhn.redhat.com/errata/RHSA-2015-1534.htmlThird Party Advisory
http://www.openwall.com/lists/oss-security/2015/03/20/18Mailing List
http://www.securitytracker.com/id/1032414Third Party Advisory, VDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=1204722Issue Tracking
https://github.com/torvalds/linux/commit/f84598bd7c851f8b0bf8cd0d7c3be0d73c432ff4Patch
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=f84598bd7c851f8b0bf8cd0d7c3be0d73c432ff4Broken Link
http://lists.fedoraproject.org/pipermail/package-announce/2015-March/153329.htmlThird Party Advisory
http://rhn.redhat.com/errata/RHSA-2015-1534.htmlThird Party Advisory
http://www.openwall.com/lists/oss-security/2015/03/20/18Mailing List
http://www.securitytracker.com/id/1032414Third Party Advisory, VDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=1204722Issue Tracking
https://github.com/torvalds/linux/commit/f84598bd7c851f8b0bf8cd0d7c3be0d73c432ff4Patch

Timeline

Published: May 27, 2015
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2015-2666?

How severe is CVE-2015-2666?

Severity scoring for CVE-2015-2666 is pending analysis. The EPSS model estimates a 0.42% probability of exploitation in the next 30 days.

How do I fix CVE-2015-2666?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2015-2666?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST