CVE-2023-40550
MEDIUMCVSS 5.5/10EPSS 0.39%
Last modified
CVE-2023-40550 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. An out-of-bounds read flaw was found in Shim when it tried to validate the SBAT information. This issue may expose sensitive data during the system's boot phase.. EPSS estimates a 0.39% chance of exploitation in the next 30 days.
Description
An out-of-bounds read flaw was found in Shim when it tried to validate the SBAT information. This issue may expose sensitive data during the system's boot phase.
Metrics
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-2023-40550Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2259915Issue Tracking, Vendor Advisory
- https://access.redhat.com/security/cve/CVE-2023-40550Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2259915Issue Tracking, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2023-40550?
An out-of-bounds read flaw was found in Shim when it tried to validate the SBAT information. This issue may expose sensitive data during the system's boot phase.
How severe is CVE-2023-40550?
CVE-2023-40550 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.39% probability of exploitation in the next 30 days.
How do I fix CVE-2023-40550?
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.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2023-40550?
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Scan your code nowSource: NVD / NIST