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CVE-2015-3291

11
FAUCET Score

CVE-2015-3291 is a denial-of-service vulnerability affecting the Linux kernel before version 4.1.6 on x86_64 systems. A local attacker can manipulate the rsp register and issue a syscall, causing the kernel to improperly handle nested Non-Maskable Interrupts (NMIs) and skip NMI processing. This vulnerability has a low severity CVSS score of 2.1, indicating a low attack complexity and a partial availability impact. There is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.1.5CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

2.1LOW

AV:L/AC:L/Au:N/C:N/I:N/A:P

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Exploitability Score
3.9
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.40%
Probability of exploitation in next 30 days
EPSS Percentile
32.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0040 is in the 54th percentile among its peer group of 2,096 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.6 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Patches (3)

redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-rt
redhatend of lifevia redhat_api
Product: Red Hat Enterprise MRG 2Fixed in: realtime-kernel

Vendor Advisories (1)

redhatCVE-2015-3291Low

kernel: x86/nmi: malicious userspace programs can cause the kernel to skip NMIs

Jul 22, 2015

References

git.kernel.org / cgit/linux/kernel/git/torvalds/linux.git/commit
bugzilla.redhat.com / show_bug.cgi
github.com / torvalds/linux/commit/810bc075f78ff2c221536eb3008eac6a492dba2d
debian.org / security/2015/dsa-3313
kernel.org / pub/linux/kernel/v4.x/ChangeLog-4.1.6
Vendor Advisory
openwall.com / lists/oss-security/2015/07/22/7
securityfocus.com / bid/76003
ubuntu.com / usn/USN-2687-1
ubuntu.com / usn/USN-2688-1
ubuntu.com / usn/USN-2689-1
ubuntu.com / usn/USN-2690-1
ubuntu.com / usn/USN-2691-1