What is CVE-2017-18221?

CVE-2017-18221 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a Improper Input Validation flaw (CWE-20). CVE-2017-18221 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2017-18221?

CVE-2017-18221 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-2017-18221?

No patch is currently available for CVE-2017-18221. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2017-18221 actively exploited?

CVE-2017-18221 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2017-18221

Medium

The __munlock_pagevec function in mm/mlock.c in the Linux kernel before 4.11.4 allows local users to cause a denial of service (NR_MLOCK accounting corruption) via crafted use of mlockall and munlockall system calls.

Package Linux Kernel

Published 2018-03-07

Last modified 2024-11-21

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-20

CVE-2017-18221 is a Improper Input Validation vulnerability

What is Improper Input Validation?

The product receives input but does not validate it correctly, allowing attackers to craft inputs that cause unexpected behavior. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2017-18221 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Securityfocus
http://www.securityfocus.com/bid/103321

Third Party Advisory VDB Entry
Ubuntu Security
https://usn.ubuntu.com/3655-1/
Ubuntu Security
https://usn.ubuntu.com/3655-2/
Kernel.org
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.11.4

Release Notes Vendor Advisory
Kernel patch commit
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=70feee0e1ef331b22cc51f383d532a0d043fbdcc
Patch
Kernel patch commit
https://github.com/torvalds/linux/commit/70feee0e1ef331b22cc51f383d532a0d043fbdcc
Patch

Details

CVE ID CVE-2017-18221

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.0

Published 2018-03-07

Modified 2024-11-21

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2017-18221?

CVE-2017-18221 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as an Improper Input Validation flaw (CWE-20) . CVE-2017-18221 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2017-18221?

CVE-2017-18221 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-2017-18221?

No patch is currently available for CVE-2017-18221. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2017-18221 actively exploited?

No — CVE-2017-18221 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Improper Input Validation (CWE-20)?

The product receives input but does not validate it correctly, allowing attackers to craft inputs that cause unexpected behavior. View CWE-20 on MITRE CWE →