What is CVE-2018-12896?

CVE-2018-12896 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a Integer Overflow flaw (CWE-190). CVE-2018-12896 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2018-12896?

CVE-2018-12896 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-2018-12896?

Monitor the NIST NVD and your Linux distribution's security advisories for CVE-2018-12896 patch availability.

Is CVE-2018-12896 actively exploited?

CVE-2018-12896 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Integer Overflow (CWE-190)?

The product performs a calculation that can produce an integer overflow, leading to unexpected values. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/190.html

CVE-2018-12896

Medium

An issue was discovered in the Linux kernel through 4.17.3. An Integer Overflow in kernel/time/posix-timers.c in the POSIX timer code is caused by the way the overrun accounting works. Depending on interval and expiry time values, the overrun can be larger than INT_MAX, but the accounting is int based. This basically makes the accounting values, which are visible to user space via timer_getoverrun(2) and siginfo::si_overrun, random. For example, a local user can cause a denial of service (signed integer overflow) via crafted mmap, futex, timer_create, and timer_settime system calls.

Package Linux Kernel

Published 2018-07-02

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-190

CVE-2018-12896 is a Integer Overflow vulnerability

What is Integer Overflow?

The product performs a calculation that can produce an integer overflow, leading to unexpected values. Learn more on MITRE CWE

References

13 total

GitHub
https://github.com/lcytxw/bug_repro/tree/master/bug_200189

Exploit Third Party Advisory
Kernel.org
https://bugzilla.kernel.org/show_bug.cgi?id=200189

Issue Tracking Vendor Advisory
GitHub
https://github.com/torvalds/linux/commit/78c9c4dfbf8c04883941445a195276bb4bb92c76

Patch Third Party Advisory
Debian Security
https://lists.debian.org/debian-lts-announce/2019/03/msg00017.html

Mailing List Third Party Advisory
Debian Security
https://lists.debian.org/debian-lts-announce/2019/03/msg00034.html

Mailing List Third Party Advisory

Showing 5 of 13 references View all on NVD

Details

CVE ID CVE-2018-12896

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.0

Published 2018-07-02

Modified 2024-11-21

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2018-12896?

CVE-2018-12896 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as an Integer Overflow flaw (CWE-190) . CVE-2018-12896 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2018-12896?

CVE-2018-12896 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-2018-12896?

Monitor the NIST NVD and your Linux distribution's security advisories for CVE-2018-12896 patch availability.
Is CVE-2018-12896 actively exploited?

No. CVE-2018-12896 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.