What is CVE-2018-12633?

CVE-2018-12633 is a Medium severity Linux kernel vulnerability with a CVSS score of 6.3 out of 10, classified as a Race Condition flaw (CWE-362). CVE-2018-12633 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2018-12633?

CVE-2018-12633 has a CVSS score of 6.3 out of 10, rated Medium severity. The vector string is CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:H.

Is there a patch available for CVE-2018-12633?

No patch is currently available for CVE-2018-12633. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2018-12633 actively exploited?

CVE-2018-12633 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Race Condition (CWE-362)?

The product contains a code sequence that can run concurrently with other code, creating unexpected states. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/362.html

CVE-2018-12633

Medium

An issue was discovered in the Linux kernel through 4.17.2. vbg_misc_device_ioctl() in drivers/virt/vboxguest/vboxguest_linux.c reads the same user data twice with copy_from_user. The header part of the user data is double-fetched, and a malicious user thread can tamper with the critical variables (hdr.size_in and hdr.size_out) in the header between the two fetches because of a race condition, leading to severe kernel errors, such as buffer over-accesses. This bug can cause a local denial of service and information leakage.

Package Linux Kernel

Published 2018-06-22

Last modified 2024-11-21

CVSS version 3.0

Patch available

Awaiting data

CVSS 3.0 score

6.3

out of 10

Medium

Attack Vector

Local

Attack Complexity

High

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

High

Vector string

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

Weakness type

CWE-362

CVE-2018-12633 is a Race Condition vulnerability

What is Race Condition?

The product contains a code sequence that can run concurrently with other code, creating unexpected states. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2018-12633 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel.org
https://bugzilla.kernel.org/show_bug.cgi?id=200131

Issue Tracking Vendor Advisory
Kernel patch commit
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=bd23a7269834dc7c1f93e83535d16ebc44b75eba
Patch
Kernel patch commit
https://github.com/torvalds/linux/commit/bd23a7269834dc7c1f93e83535d16ebc44b75eba
Patch

Details

CVE ID CVE-2018-12633

Severity Medium

CVSS score 6.3 / 10

CVSS version 3.0

Published 2018-06-22

Modified 2024-11-21

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2018-12633?

CVE-2018-12633 is a Medium severity Linux kernel vulnerability with a CVSS score of 6.3 out of 10 , classified as a Race Condition flaw (CWE-362) . CVE-2018-12633 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2018-12633?

CVE-2018-12633 has a CVSS score of 6.3 out of 10, rated Medium severity (CVSS 3.0). The vector string is CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:H.
Is there a patch available for CVE-2018-12633?

No patch is currently available for CVE-2018-12633. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2018-12633 actively exploited?

No — CVE-2018-12633 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Race Condition (CWE-362)?

The product contains a code sequence that can run concurrently with other code, creating unexpected states. View CWE-362 on MITRE CWE →