CVE-2023-21400

Name: CVE-2023-21400
Creator: NVD / NIST
Published: 2023-07-13T00:15:24.34+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.7/10EPSS 0.26%

Last modified Jun 17, 2026

CVE-2023-21400 is a medium-severity vulnerability rated 6.7/10 on the CVSS scale. In multiple functions of io_uring.c, there is a possible kernel memory corruption due to improper locking. This could lead to local escalation of privilege in the kernel with System execution privileges needed. EPSS estimates a 0.26% chance of exploitation in the next 30 days.

Description

In multiple functions of io_uring.c, there is a possible kernel memory corruption due to improper locking. This could lead to local escalation of privilege in the kernel with System execution privileges needed. User interaction is not needed for exploitation.

Metrics

CVSS 3.1

6.7/10

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

EPSS Probability

0.26%

17.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-667

Affected Software

Vendor	Product	Versions
Google	Android	All versions
Debian	Debian Linux	10.0
Debian	Debian Linux	11.0

References

http://packetstormsecurity.com/files/175072/Kernel-Live-Patch-Security-Notice-LSN-0098-1.htmlThird Party Advisory, VDB Entry
http://www.openwall.com/lists/oss-security/2023/07/14/2Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2023/07/19/2Exploit, Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2023/07/19/7Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2023/07/25/7Mailing List
https://lists.debian.org/debian-lts-announce/2023/10/msg00027.htmlMailing List, Third Party Advisory
https://security.netapp.com/advisory/ntap-20240119-0012/
https://source.android.com/security/bulletin/pixel/2023-07-01Vendor Advisory
https://www.debian.org/security/2023/dsa-5480Third Party Advisory
http://packetstormsecurity.com/files/175072/Kernel-Live-Patch-Security-Notice-LSN-0098-1.htmlThird Party Advisory, VDB Entry
http://www.openwall.com/lists/oss-security/2023/07/14/2Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2023/07/19/2Exploit, Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2023/07/19/7Mailing List, Third Party Advisory
http://www.openwall.com/lists/oss-security/2023/07/25/7Mailing List
https://lists.debian.org/debian-lts-announce/2023/10/msg00027.htmlMailing List, Third Party Advisory
https://security.netapp.com/advisory/ntap-20240119-0012/
https://source.android.com/security/bulletin/pixel/2023-07-01Vendor Advisory
https://www.debian.org/security/2023/dsa-5480Third Party Advisory

Timeline

Published: Jul 13, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-21400?

How severe is CVE-2023-21400?

CVE-2023-21400 has a CVSS score of 6.7/10 (MEDIUM severity). The EPSS model estimates a 0.26% probability of exploitation in the next 30 days.

How do I fix CVE-2023-21400?

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-2023-21400?

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

Scan your code now

Source: NVD / NIST