What is CVE-2021-31916?

CVE-2021-31916 is a Medium severity Linux kernel vulnerability with a CVSS score of 6.7 out of 10, classified as a Out-of-bounds Write flaw (CWE-787). CVE-2021-31916 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-31916?

CVE-2021-31916 has a CVSS score of 6.7 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2021-31916?

No patch is currently available for CVE-2021-31916. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2021-31916 actively exploited?

CVE-2021-31916 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Out-of-bounds Write (CWE-787)?

The product writes data past the end or before the beginning of the intended buffer. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/787.html

CVE-2021-31916

Medium

An out-of-bounds (OOB) memory write flaw was found in list_devices in drivers/md/dm-ioctl.c in the Multi-device driver module in the Linux kernel before 5.12. A bound check failure allows an attacker with special user (CAP_SYS_ADMIN) privilege to gain access to out-of-bounds memory leading to a system crash or a leak of internal kernel information. The highest threat from this vulnerability is to system availability.

Package Linux Kernel

Published 2021-05-06

Last modified 2024-11-21

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

6.7

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Weakness type

CWE-787

CVE-2021-31916 is a Out-of-bounds Write vulnerability

What is Out-of-bounds Write?

The product writes data past the end or before the beginning of the intended buffer. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2021-31916 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Debian Security
https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html

Mailing List Third Party Advisory
Debian Security
https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html

Mailing List Third Party Advisory
Seclists
https://seclists.org/oss-sec/2021/q1/268

Mailing List Third Party Advisory
Kernel patch commit
https://bugzilla.redhat.com/show_bug.cgi?id=1946965
Patch
Kernel patch commit
https://github.com/torvalds/linux/commit/4edbe1d7bcffcd6269f3b5eb63f710393ff2ec7a
Patch

Details

CVE ID CVE-2021-31916

Severity Medium

CVSS score 6.7 / 10

CVSS version 3.1

Published 2021-05-06

Modified 2024-11-21

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2021-31916?

CVE-2021-31916 is a Medium severity Linux kernel vulnerability with a CVSS score of 6.7 out of 10 , classified as an Out-of-bounds Write flaw (CWE-787) . CVE-2021-31916 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-31916?

CVE-2021-31916 has a CVSS score of 6.7 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2021-31916?

No patch is currently available for CVE-2021-31916. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2021-31916 actively exploited?

No — CVE-2021-31916 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Out-of-bounds Write (CWE-787)?

The product writes data past the end or before the beginning of the intended buffer. View CWE-787 on MITRE CWE →