CVE-2023-5215

MEDIUM

libnbd - Memory Corruption

Title source: llm

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.

References (4)

[Vendor Advisory] https://access.redhat.com/security/cve/CVE-2023-5215

[Issue Tracking, Vendor Advisory] https://bugzilla.redhat.com/show_bug.cgi?id=2241041

[Exploit, Patch] https://listman.redhat.com/archives/libguestfs/2023-September/032635.html

[Vendor Advisory] https://access.redhat.com/errata/RHSA-2024:2204

Scores

CVSS v3 5.3

EPSS 0.0005

EPSS Percentile 14.1%

Attack Vector ADJACENT_NETWORK

CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Classification

CWE

CWE-252 CWE-241

Status published

Affected Products (3)

redhat/libnbd < 1.18.0

redhat/enterprise_linux

redhat/enterprise_linux

Timeline

Published Sep 28, 2023

Tracked Since Feb 18, 2026