CVE-2023-1386

A flaw was found in the 9p passthrough filesystem (9pfs) implementation in QEMU. When a local user in the guest writes an executable file with SUID or SGID, none of these privileged bits are correctly dropped. As a result, in rare circumstances, this flaw could be used by malicious users in the guest to elevate their privileges within the guest and help a host local user to elevate privileges on the host.

• CWE-281
• CWE-281

• https://access.redhat.com/security/cve/CVE-2023-1386Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=2223985Issue Tracking, Third Party Advisory
• https://github.com/advisories/GHSA-ppj8-867g-rgjr
• https://github.com/v9fs/linux/issues/29
• https://security.netapp.com/advisory/ntap-20230831-0005/
• https://access.redhat.com/security/cve/CVE-2023-1386Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=2223985Issue Tracking, Third Party Advisory
• https://github.com/advisories/GHSA-ppj8-867g-rgjr
• https://github.com/v9fs/linux/issues/29
• https://security.netapp.com/advisory/ntap-20230831-0005/

Published

Jul 24, 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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