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CVE-2014-7843

15
FAUCET Score

CVE-2014-7843 describes a denial-of-service vulnerability in the Linux kernel (versions prior to 3.17.4) specifically affecting ARM64 systems. A local attacker can trigger a system crash by reading one byte beyond a /dev/zero page boundary due to an error in the __clear_user function. The vulnerability has a CVSS score of 4.9, indicating low attack complexity and local access, with the primary impact being system availability. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 3.17.3CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:arm64:*

CVSS Data

CVSS version used by this source: 2.0

4.9MEDIUM

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Exploitability Score
3.9
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.37%
Probability of exploitation in next 30 days
EPSS Percentile
30.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0037 is in the 50th percentile among its peer group of 3,052 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, 0.1 Bluesky, 0.0 Mastodon, and 0.4 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

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
redhatpatch availablevia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2014-7843Moderate

kernel: aarch64: copying from /dev/zero causes local DoS

Nov 13, 2014

References

git.kernel.org
bugzilla.redhat.com / show_bug.cgi
PatchVendor Advisory
secunia.com / advisories/62305
github.com / torvalds/linux/commit/97fc15436b36ee3956efad83e22a557991f7d19d
PatchVendor Advisory
kernel.org / pub/linux/kernel/v3.x/ChangeLog-3.17.4
Vendor Advisory
openwall.com / lists/oss-security/2014/11/13/5
securityfocus.com / bid/71082