CVE-2023-4135

Name: CVE-2023-4135
Creator: NVD / NIST
Published: 2023-08-04T14:15:12.173+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 0.41%

Last modified Jun 17, 2026

CVE-2023-4135 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. A heap out-of-bounds memory read flaw was found in the virtual nvme device in QEMU. The QEMU process does not validate an offset provided by the guest before computing a host heap pointer, which is used for copying data back to the guest. EPSS estimates a 0.41% chance of exploitation in the next 30 days.

Description

A heap out-of-bounds memory read flaw was found in the virtual nvme device in QEMU. The QEMU process does not validate an offset provided by the guest before computing a host heap pointer, which is used for copying data back to the guest. Arbitrary heap memory relative to an allocated buffer can be disclosed.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

0.41%

32.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions	Update
Qemu	Qemu	>= 8.0.0, < 8.1.0	—
Qemu	Qemu	8.1.0	Rc0
Fedoraproject	Fedora	38	—

References

https://access.redhat.com/security/cve/CVE-2023-4135Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2229101Issue Tracking, Patch, Third Party Advisory
https://security.netapp.com/advisory/ntap-20230915-0012/Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-CAN-21521Broken Link, Third Party Advisory, VDB Entry
https://access.redhat.com/security/cve/CVE-2023-4135Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2229101Issue Tracking, Patch, Third Party Advisory
https://security.netapp.com/advisory/ntap-20230915-0012/Third Party Advisory
https://www.zerodayinitiative.com/advisories/ZDI-CAN-21521Broken Link, Third Party Advisory, VDB Entry

Timeline

Published: Aug 4, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-4135?

How severe is CVE-2023-4135?

CVE-2023-4135 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 0.41% probability of exploitation in the next 30 days.

How do I fix CVE-2023-4135?

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-2023-4135?

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

Scan your code now

Source: NVD / NIST