CVE-2023-21400

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.

• CWE-667

• 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

Published

Jul 13, 2023

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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