CVE-2021-41073

Name: CVE-2021-41073
Creator: NVD / NIST
Published: 2021-09-19T17:15:07.227+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 1.69%

Last modified Jun 17, 2026

CVE-2021-41073 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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.. EPSS estimates a 1.69% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

7.8/10

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

EPSS Probability

1.69%

74.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-763

Affected Software

Vendor	Product	Versions
Linux	Linux Kernel	>= 5.10, < 5.10.68
Linux	Linux Kernel	>= 5.11, < 5.14.7
Debian	Debian Linux	10.0
Fedoraproject	Fedora	33
Fedoraproject	Fedora	34
Netapp	Cloud Backup	All versions
Netapp	Solidfire Baseboard Management Controller	All versions
Netapp	H410c Firmware	All versions
Netapp	H300s Firmware	All versions
Netapp	H500s Firmware	All versions
Netapp	H700s Firmware	All versions
Netapp	H300e Firmware	All versions
Netapp	H500e Firmware	All versions
Netapp	H700e Firmware	All versions
Netapp	H410s Firmware	All versions

References

http://www.openwall.com/lists/oss-security/2021/09/18/2Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/09/18/2Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/09/18/2Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/09/18/2Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2022/06/04/4Mailing List, Third Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=16c8d2df7ec0eed31b7d3b61cb13206a7fb930ccPatch, Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/J7KSMIOQ4377CVTHMWNGNCWHMCRFRP2T/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PAP4TXEZ7J4EZQMQW5SIJMWXG7WZT3F7/
https://security.netapp.com/advisory/ntap-20211014-0003/Third Party Advisory
https://www.debian.org/security/2021/dsa-4978Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/09/18/2Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/09/18/2Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/09/18/2Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2021/09/18/2Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2022/06/04/4Mailing List, Third Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=16c8d2df7ec0eed31b7d3b61cb13206a7fb930ccPatch, Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/J7KSMIOQ4377CVTHMWNGNCWHMCRFRP2T/
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PAP4TXEZ7J4EZQMQW5SIJMWXG7WZT3F7/
https://security.netapp.com/advisory/ntap-20211014-0003/Third Party Advisory
https://www.debian.org/security/2021/dsa-4978Third Party Advisory

Timeline

Published: Sep 19, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-41073?

How severe is CVE-2021-41073?

CVE-2021-41073 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 1.69% probability of exploitation in the next 30 days.

How do I fix CVE-2021-41073?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-41073?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST