What is CVE-2017-12762?

CVE-2017-12762 is a Critical severity Linux kernel vulnerability with a CVSS score of 9.8 out of 10, classified as a Buffer Overflow flaw (CWE-119). CVE-2017-12762 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2017-12762?

CVE-2017-12762 has a CVSS score of 9.8 out of 10, rated Critical severity. The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2017-12762?

No patch is currently available for CVE-2017-12762. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2017-12762 actively exploited?

CVE-2017-12762 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-2017-12762

Critical

In /drivers/isdn/i4l/isdn_net.c: A user-controlled buffer is copied into a local buffer of constant size using strcpy without a length check which can cause a buffer overflow. This affects the Linux kernel 4.9-stable tree, 4.12-stable tree, 3.18-stable tree, and 4.4-stable tree.

Package Linux Kernel

Published 2017-08-09

Last modified 2026-05-13

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

9.8

out of 10

Critical

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Weakness type

CWE-119

CVE-2017-12762 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-2017-12762 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/2020/02/11/1

Mailing List Third Party Advisory
Openwall
http://www.openwall.com/lists/oss-security/2020/02/11/2

Mailing List Third Party Advisory
Openwall
http://www.openwall.com/lists/oss-security/2020/02/14/4

Mailing List Third Party Advisory
Securityfocus
http://www.securityfocus.com/bid/100251

Third Party Advisory VDB Entry
Ubuntu Security
https://usn.ubuntu.com/3620-1/

Third Party Advisory
Ubuntu Security
https://usn.ubuntu.com/3620-2/

Third Party Advisory
Kernel patch commit
https://patchwork.kernel.org/patch/9880041/
Patch

Details

CVE ID CVE-2017-12762

Severity Critical

CVSS score 9.8 / 10

CVSS version 3.1

Published 2017-08-09

Modified 2026-05-13

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2017-12762?

CVE-2017-12762 is a Critical severity Linux kernel vulnerability with a CVSS score of 9.8 out of 10 , classified as a Buffer Overflow flaw (CWE-119) . CVE-2017-12762 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2017-12762?

CVE-2017-12762 has a CVSS score of 9.8 out of 10, rated Critical severity (CVSS 3.1). The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2017-12762?

No patch is currently available for CVE-2017-12762. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2017-12762 actively exploited?

No — CVE-2017-12762 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 →