VULNERABILITY INTELLIGENCE

CVE-2023-5215

CVSS score5.3 MEDIUM
EPSS probability0.81%
CISA KEVNot currently listed
Published2023-09-28
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

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.

Weakness classification

  • CWE-241: Improper Handling of Unexpected Data Type
  • CWE-252: Unchecked Return Value

Primary references