What is CVE-2014-7843?

CVE-2014-7843 is a Medium severity Linux kernel vulnerability with a CVSS score of 4.9 out of 10. CVE-2014-7843 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2014-7843?

CVE-2014-7843 has a CVSS score of 4.9 out of 10, rated Medium severity. The vector string is AV:L/AC:L/Au:N/C:N/I:N/A:C.

Is there a patch available for CVE-2014-7843?

No patch is currently available for CVE-2014-7843. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2014-7843 actively exploited?

CVE-2014-7843 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2014-7843

Medium

The __clear_user function in arch/arm64/lib/clear_user.S in the Linux kernel before 3.17.4 on the ARM64 platform allows local users to cause a denial of service (system crash) by reading one byte beyond a /dev/zero page boundary.

Package Linux Kernel

Published 2014-11-30

Last modified 2026-05-06

CVSS version 2.0

Patch available

Awaiting data

CVSS 2.0 score

4.9

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

User Interaction

Scope

Confidentiality

Low

Integrity

None

Availability

Vector string

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

Weakness type

CWE-17

CVE-2014-7843 is classified as CWE-17

See CWE-17 on MITRE CWE for full details on this weakness type.

References

The following references provide additional information about CVE-2014-7843 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Secunia
http://secunia.com/advisories/62305
Kernel.org
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.17.4

Vendor Advisory
Openwall
http://www.openwall.com/lists/oss-security/2014/11/13/5
Securityfocus
http://www.securityfocus.com/bid/71082
Kernel patch commit
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=97fc15436b36ee3956efad83e22a557991f7d19d
Patch
Kernel patch commit
https://bugzilla.redhat.com/show_bug.cgi?id=1163744
Patch
Kernel patch commit
https://github.com/torvalds/linux/commit/97fc15436b36ee3956efad83e22a557991f7d19d
Patch

Details

CVE ID CVE-2014-7843

Severity Medium

CVSS score 4.9 / 10

CVSS version 2.0

Published 2014-11-30

Modified 2026-05-06

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2014-7843?

CVE-2014-7843 is a Medium severity Linux kernel vulnerability with a CVSS score of 4.9 out of 10 . CVE-2014-7843 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2014-7843?

CVE-2014-7843 has a CVSS score of 4.9 out of 10, rated Medium severity (CVSS 2.0). The vector string is AV:L/AC:L/Au:N/C:N/I:N/A:C.
Is there a patch available for CVE-2014-7843?

No patch is currently available for CVE-2014-7843. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2014-7843 actively exploited?

No — CVE-2014-7843 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.