What is CVE-2017-17855?

CVE-2017-17855 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, classified as a Buffer Overflow flaw (CWE-119). CVE-2017-17855 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2017-17855?

CVE-2017-17855 has a CVSS score of 7.8 out of 10, rated High severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2017-17855?

No patch is currently available for CVE-2017-17855. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2017-17855 actively exploited?

CVE-2017-17855 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Buffer Overflow (CWE-119)?

The product performs operations on a memory buffer but reads or writes outside its intended boundaries. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/119.html

CVE-2017-17855

High

kernel/bpf/verifier.c in the Linux kernel through 4.14.8 allows local users to cause a denial of service (memory corruption) or possibly have unspecified other impact by leveraging improper use of pointers in place of scalars.

Package Linux Kernel

Published 2017-12-27

Last modified 2026-05-13

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

7.8

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness type

CWE-119

CVE-2017-17855 is a Buffer Overflow vulnerability

What is Buffer Overflow?

The product performs operations on a memory buffer but reads or writes outside its intended boundaries. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2017-17855 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Openwall
http://www.openwall.com/lists/oss-security/2017/12/21/2

Mailing List Third Party Advisory
Kernel patch commit
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=179d1c5602997fef5a940c6ddcf31212cbfebd14
Patch
Kernel patch commit
https://github.com/torvalds/linux/commit/179d1c5602997fef5a940c6ddcf31212cbfebd14
Patch

Details

CVE ID CVE-2017-17855

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2017-12-27

Modified 2026-05-13

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2017-17855?

CVE-2017-17855 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 , classified as a Buffer Overflow flaw (CWE-119) . CVE-2017-17855 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2017-17855?

CVE-2017-17855 has a CVSS score of 7.8 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2017-17855?

No patch is currently available for CVE-2017-17855. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2017-17855 actively exploited?

No — CVE-2017-17855 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Buffer Overflow (CWE-119)?

The product performs operations on a memory buffer but reads or writes outside its intended boundaries. View CWE-119 on MITRE CWE →