CVE-2023-40551
MEDIUMCVSS 5.1/10EPSS 0.39%
Last modified
CVE-2023-40551 is a medium-severity vulnerability rated 5.1/10 on the CVSS scale. A flaw was found in the MZ binary format in Shim. An out-of-bounds read may occur, leading to a crash or possible exposure of sensitive data during the system's boot phase.. EPSS estimates a 0.39% chance of exploitation in the next 30 days.
Description
A flaw was found in the MZ binary format in Shim. An out-of-bounds read may occur, leading to a crash or possible exposure of sensitive data during the system's boot phase.
Metrics
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:L/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Redhat | Shim | < 15.8 |
| Fedoraproject | Fedora | 39 |
| Redhat | Enterprise Linux | 8.0 |
| Redhat | Enterprise Linux | 9.0 |
References
- https://access.redhat.com/security/cve/CVE-2023-40551Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2259918Issue Tracking, Vendor Advisory
- https://access.redhat.com/security/cve/CVE-2023-40551Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2259918Issue Tracking, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2023-40551?
A flaw was found in the MZ binary format in Shim. An out-of-bounds read may occur, leading to a crash or possible exposure of sensitive data during the system's boot phase.
How severe is CVE-2023-40551?
CVE-2023-40551 has a CVSS score of 5.1/10 (MEDIUM severity). The EPSS model estimates a 0.39% probability of exploitation in the next 30 days.
How do I fix CVE-2023-40551?
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.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
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Are you affected by CVE-2023-40551?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST