CVE-2023-5215
MEDIUMDescription
A flaw was found in libnbd. A server can reply with a block size larger than 2^63 (the NBD spec states the size is a 64-bit unsigned value). This issue could lead to an application crash or other unintended behavior for NBD clients that doesn't treat the return value of the nbd_get_size() function correctly.
How to fix
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Impact
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Exploit Intelligence
Moderate risk: more likely to be exploited than 51% of all known CVEs.
References
Related Vulnerabilities
Other CWE-241 vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2023-30591 | High | 7.5 | 54% | - | - |
| CVE-2022-29181 | High | 8.2 | 3.3% | - | Fix |
| CVE-2021-39131 | High | 7.5 | 1.9% | - | - |
| CVE-2021-40116 | High | 8.6 | 1.3% | - | Fix |
| CVE-2022-24668 | High | 7.5 | 1.1% | - | Fix |
| CVE-2021-32696 | Low | 3.7 | 1.1% | - | Fix |
Common questions
How do I fix CVE-2023-5215?
Published advisories record a fix for 25 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.
Is CVE-2023-5215 being actively exploited?
Not that we know of. CVE-2023-5215 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.75% is the estimated probability that it will be exploited in the next 30 days. That is higher than 51% of all scored CVEs.
How severe is CVE-2023-5215?
CVE-2023-5215 has a CVSS v3 base score of 5.3, rated medium. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
What does CVE-2023-5215 affect?
Published advisories record a fix for libnbd (Debian), libnbd (Red Hat / RHEL), libnbd (Rocky), libnbd-bash-completion (Red Hat / RHEL), and 21 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.
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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.