medium
6.9
CWE
119
Advisory Published
CVE Published
Updated

CVE-2015-2666: Buffer Overflow

First published: Mon Mar 23 2015(Updated: )

It was found that the Linux kernel's Intel early microcode loader was vulnerable to a stack overflow. On a UEFI Secure Boot enabled system, a local root user could use this flaw to increase their privileges to the kernel (ring0) level despite the additional restrictions in place. Upstream fix: <a href="https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit?id=f84598bd7c851f8b0bf8cd0d7c3be0d73c432ff4">https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit?id=f84598bd7c851f8b0bf8cd0d7c3be0d73c432ff4</a>

Credit: cve@mitre.org cve@mitre.org cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Linux kernel>=3.9<3.10.83
Linux kernel>=3.11<3.12.40
Linux kernel>=3.13<3.14.47
Linux kernel>=3.15<3.16.35
Linux kernel>=3.17<3.18.19
Fedora=21
Linux Kernel<=3.19.8
debian/linux
5.10.223-1
5.10.234-1
6.1.123-1
6.1.128-1
6.12.12-1
6.12.17-1

Remedy

https://github.com/torvalds/linux/commit/f84598bd7c851f8b0bf8cd0d7c3be0d73c432ff4

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2015-2666?

    CVE-2015-2666 is classified as a high-severity vulnerability due to its potential for local privilege escalation.

  • How do I fix CVE-2015-2666?

    To fix CVE-2015-2666, update the Linux kernel to a version that is not affected, such as 5.10.223-1 or later.

  • Which versions of the Linux kernel are affected by CVE-2015-2666?

    CVE-2015-2666 affects Linux kernel versions between 3.9 to 3.19.8, including several specific versions in that range.

  • Can CVE-2015-2666 be exploited on systems with UEFI Secure Boot enabled?

    Yes, CVE-2015-2666 can be exploited by a local root user on systems with UEFI Secure Boot enabled to escalate privileges.

  • What is the impact of CVE-2015-2666?

    The impact of CVE-2015-2666 is that it allows a local attacker to gain kernel-level privileges, potentially leading to a full system compromise.

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