What is CVE-2017-14340?

CVE-2017-14340 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a NULL Pointer Dereference flaw (CWE-476). CVE-2017-14340 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2017-14340?

CVE-2017-14340 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2017-14340?

No patch is currently available for CVE-2017-14340. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2017-14340 actively exploited?

CVE-2017-14340 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is NULL Pointer Dereference (CWE-476)?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/476.html

CVE-2017-14340

Medium

The XFS_IS_REALTIME_INODE macro in fs/xfs/xfs_linux.h in the Linux kernel before 4.13.2 does not verify that a filesystem has a realtime device, which allows local users to cause a denial of service (NULL pointer dereference and OOPS) via vectors related to setting an RHINHERIT flag on a directory.

Package Linux Kernel

Published 2017-09-15

Last modified 2026-05-13

CVSS version 3.0

Patch available

Awaiting data

CVSS 3.0 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness type

CWE-476

CVE-2017-14340 is a NULL Pointer Dereference vulnerability

What is NULL Pointer Dereference?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2017-14340 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Debian Security
http://www.debian.org/security/2017/dsa-3981
Kernel.org
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.2

Release Notes Vendor Advisory
Securityfocus
http://www.securityfocus.com/bid/100851

Third Party Advisory VDB Entry
Red Hat
https://access.redhat.com/errata/RHSA-2017:2918
Kernel patch commit
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=b31ff3cdf540110da4572e3e29bd172087af65cc
Patch
Kernel patch commit
http://seclists.org/oss-sec/2017/q3/436
Patch
Kernel patch commit
https://bugzilla.redhat.com/show_bug.cgi?id=1491344
Patch

4 patch commits total View all on NVD

Details

CVE ID CVE-2017-14340

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.0

Published 2017-09-15

Modified 2026-05-13

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2017-14340?

CVE-2017-14340 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as a NULL Pointer Dereference flaw (CWE-476) . CVE-2017-14340 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2017-14340?

CVE-2017-14340 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.0). The vector string is CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2017-14340?

No patch is currently available for CVE-2017-14340. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2017-14340 actively exploited?

No — CVE-2017-14340 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is NULL Pointer Dereference (CWE-476)?

The product dereferences a pointer that it expects to be valid but is NULL, typically causing a crash. View CWE-476 on MITRE CWE →