What is CVE-2021-41073?

CVE-2021-41073 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10, classified as a Release of Invalid Pointer or Reference flaw (CWE-763). CVE-2021-41073 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2021-41073?

CVE-2021-41073 has a CVSS score of 7.8 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:H/A:H.

Is there a patch available for CVE-2021-41073?

No patch is currently available for CVE-2021-41073. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

Is CVE-2021-41073 actively exploited?

CVE-2021-41073 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Release of Invalid Pointer or Reference (CWE-763)?

The product attempts to return a memory resource to the system but calls the wrong release function. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/763.html

CVE-2021-41073

High

loop_rw_iter in fs/io_uring.c in the Linux kernel 5.10 through 5.14.6 allows local users to gain privileges by using IORING_OP_PROVIDE_BUFFERS to trigger a free of a kernel buffer, as demonstrated by using /proc/<pid>/maps for exploitation.

Package Linux Kernel

Published 2021-09-19

Last modified 2024-11-21

CVSS version 3.1

Patch available

Awaiting data

CVSS 3.1 score

7.8

out of 10

High

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

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

Weakness type

CWE-763

CVE-2021-41073 is a Release of Invalid Pointer or Reference vulnerability

What is Release of Invalid Pointer or Reference?

The product attempts to return a memory resource to the system but calls the wrong release function. Learn more on MITRE CWE

References

The following references provide additional information about CVE-2021-41073 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/2021/09/18/2

Mailing List Third Party Advisory
Openwall
http://www.openwall.com/lists/oss-security/2022/06/04/4

Mailing List Third Party Advisory
Lists
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/J7KSMIOQ4377CVTHMWNGNCWHMCRFRP2T/
Lists
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PAP4TXEZ7J4EZQMQW5SIJMWXG7WZT3F7/
Security
https://security.netapp.com/advisory/ntap-20211014-0003/

Third Party Advisory
Debian Security
https://www.debian.org/security/2021/dsa-4978

Third Party Advisory
Kernel patch commit
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=16c8d2df7ec0eed31b7d3b61cb13206a7fb930cc
Patch

Details

CVE ID CVE-2021-41073

Severity High

CVSS score 7.8 / 10

CVSS version 3.1

Published 2021-09-19

Modified 2024-11-21

KEV No

Patch Awaiting data

Package linux

Frequently asked questions

What is CVE-2021-41073?

CVE-2021-41073 is a High severity Linux kernel vulnerability with a CVSS score of 7.8 out of 10 , classified as a Release of Invalid Pointer or Reference flaw (CWE-763) . CVE-2021-41073 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2021-41073?

CVE-2021-41073 has a CVSS score of 7.8 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:H/A:H.
Is there a patch available for CVE-2021-41073?

No patch is currently available for CVE-2021-41073. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
Is CVE-2021-41073 actively exploited?

No — CVE-2021-41073 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.
What is Release of Invalid Pointer or Reference (CWE-763)?

The product attempts to return a memory resource to the system but calls the wrong release function. View CWE-763 on MITRE CWE →