CVE-2023-1386

Name: CVE-2023-1386
Creator: NVD / NIST
Published: 2023-07-24T16:15:11.15+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.8/10EPSS 0.22%

Last modified Jun 17, 2026

CVE-2023-1386 is a high-severity vulnerability rated 7.8/10 on the CVSS scale. 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. EPSS estimates a 0.22% chance of exploitation in the next 30 days.

Description

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.

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

0.22%

12.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Qemu	Qemu	All versions
Fedoraproject	Fedora	38

References

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/

Timeline

Published: Jul 24, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-1386?

How severe is CVE-2023-1386?

CVE-2023-1386 has a CVSS score of 7.8/10 (HIGH severity). The EPSS model estimates a 0.22% probability of exploitation in the next 30 days.

How do I fix CVE-2023-1386?

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-2023-1386?

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

Scan your code now

Source: NVD / NIST