What is CVE-2021-3506?

CVE-2021-3506 is a High severity Linux kernel vulnerability with a CVSS score of 7.1 out of 10, classified as a Out-of-bounds Read flaw (CWE-125). CVE-2021-3506 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-3506?

CVE-2021-3506 has a CVSS score of 7.1 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:N/A:H.

Is there a patch available for CVE-2021-3506?

No patch is currently available for CVE-2021-3506. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2021-3506 actively exploited?

CVE-2021-3506 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Out-of-bounds Read (CWE-125)?

The product reads data past the end or before the beginning of the intended buffer. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/125.html

CVE-2021-3506

High

An out-of-bounds (OOB) memory access flaw was found in fs/f2fs/node.c in the f2fs module in the Linux kernel in versions before 5.12.0-rc4. A bounds check failure allows a local attacker 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 2021-04-19

Last modified 2024-11-21

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

7.1

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

High

Vector string

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

Weakness type

CWE-125

CVE-2021-3506 is a Out-of-bounds Read vulnerability

What is Out-of-bounds Read?

The product reads 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-2021-3506 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Red Hat
https://bugzilla.redhat.com/show_bug.cgi?id=1944298

Issue Tracking Third Party Advisory
Debian Security
https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html

Mailing List Third Party Advisory
Security
https://security.netapp.com/advisory/ntap-20210611-0007/

Third Party Advisory
Mail-Archive
https://www.mail-archive.com/linux-kernel%40vger.kernel.org/msg2520013.html
Kernel patch commit
http://www.openwall.com/lists/oss-security/2021/05/08/1
Patch
Kernel patch commit
https://www.openwall.com/lists/oss-security/2021/03/28/2
Patch

Details

CVE ID CVE-2021-3506

Severity High

CVSS score 7.1 / 10

CVSS version 3.1

Published 2021-04-19

Modified 2024-11-21

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2021-3506?

CVE-2021-3506 is a High severity Linux kernel vulnerability with a CVSS score of 7.1 out of 10 , classified as an Out-of-bounds Read flaw (CWE-125) . CVE-2021-3506 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-3506?

CVE-2021-3506 has a CVSS score of 7.1 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:N/A:H.
Is there a patch available for CVE-2021-3506?

No patch is currently available for CVE-2021-3506. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2021-3506 actively exploited?

No — CVE-2021-3506 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Out-of-bounds Read (CWE-125)?

The product reads data past the end or before the beginning of the intended buffer. View CWE-125 on MITRE CWE →