CVE-2023-5215
Libnbd: crash or misbehaviour when nbd server returns an unexpected block size
5.3CVSSMEDIUM
Description
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.
CVSS Vector Breakdown
Exploitability
AV:AAttack VectorAdjacent
AC:HAttack ComplexityHigh
PR:NPrivileges RequiredNone
UI:NUser InteractionNone
Scope
S:UScopeUnchanged
Impact
C:NConfidentialityNone
I:NIntegrityNone
A:HAvailabilityHigh
Weaknesses
Affected Products
and 6 more affected products View all →
Exploitability
1 exploit source identified
Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.
View exploit details Official Patch Available
References
https://access.redhat.com/errata/RHSA-2024:2204
access.redhat.com
https://access.redhat.com/security/cve/CVE-2023-5215
access.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2241041
bugzilla.redhat.com
and 10 more references View all →
Timeline
Published
Sep 28, 2023
Last Updated
Nov 21, 2024
Unlock Complete Vulnerability Intelligence
Get the full picture for CVE-2023-5215 and every CVE in our database. Create a free account — no credit card required.
Create Free AccountPlain-language analysis
Impact assessment and exploitation scenario in plain English
Attack graph visualization
Interactive attack path and kill chain mapping
Exploit details & PoC links
ExploitDB, Metasploit, GitHub PoCs with direct links
Nuclei scanner templates
Ready-to-use vulnerability scanner templates
Full remediation guide
Patch instructions, workarounds, and compliance impact
Interactive AI chat
Ask questions about this vulnerability in natural language
Related vulnerabilities
Semantically similar CVEs and attack patterns
REST API & MCP access
Integrate vulnerability data into your workflows