Vulnerability Details : CVE-2015-3291
arch/x86/entry/entry_64.S in the Linux kernel before 4.1.6 on the x86_64 platform does not properly determine when nested NMI processing is occurring, which allows local users to cause a denial of service (skipped NMI) by modifying the rsp register, issuing a syscall instruction, and triggering an NMI.
Vulnerability category: Denial of service
Threat overview for CVE-2015-3291
Top countries where our scanners detected CVE-2015-3291
Top open port discovered on systems with this issue
49152
IPs affected by CVE-2015-3291 10,723
Threat actors abusing to this issue?
Yes
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Exploit prediction scoring system (EPSS) score for CVE-2015-3291
Probability of exploitation activity in the next 30 days: 0.04%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 6 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2015-3291
Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
---|---|---|---|---|---|
2.1
|
LOW | AV:L/AC:L/Au:N/C:N/I:N/A:P |
3.9
|
2.9
|
NIST |
CWE ids for CVE-2015-3291
-
Assigned by: nvd@nist.gov (Primary)
References for CVE-2015-3291
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http://www.ubuntu.com/usn/USN-2691-1
USN-2691-1: Linux kernel vulnerabilities | Ubuntu security notices
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http://www.openwall.com/lists/oss-security/2015/07/22/7
oss-security - Linux x86_64 NMI security issues
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http://www.debian.org/security/2015/dsa-3313
Debian -- Security Information -- DSA-3313-1 linux
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https://github.com/torvalds/linux/commit/810bc075f78ff2c221536eb3008eac6a492dba2d
x86/nmi/64: Use DF to avoid userspace RSP confusing nested NMI detection · torvalds/linux@810bc07 · GitHub
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http://www.ubuntu.com/usn/USN-2687-1
USN-2687-1: Linux kernel (Trusty HWE) vulnerabilities | Ubuntu security notices
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http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=810bc075f78ff2c221536eb3008eac6a492dba2d
kernel/git/torvalds/linux.git - Linux kernel source tree
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http://www.securityfocus.com/bid/76003
Linux Kernel 'x86/entry/entry_64.S' Local Security Bypass Vulnerability
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https://bugzilla.redhat.com/show_bug.cgi?id=1243489
1243489 – (CVE-2015-3291) CVE-2015-3291 kernel: x86/nmi: malicious userspace programs can cause the kernel to skip NMIs
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http://www.ubuntu.com/usn/USN-2689-1
USN-2689-1: Linux kernel (Utopic HWE) vulnerabilities | Ubuntu security notices
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http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.1.6
Vendor Advisory
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http://www.ubuntu.com/usn/USN-2690-1
USN-2690-1: Linux kernel (Vivid HWE) vulnerabilities | Ubuntu security notices
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http://www.ubuntu.com/usn/USN-2688-1
USN-2688-1: Linux kernel vulnerabilities | Ubuntu security notices
Products affected by CVE-2015-3291
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*