CVE-2026-43405

medium Red Hat
CVSS v3 Base Score
7.0
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS Score
0.0%
Exploitation probability in 30 days
Top 93% most likely to be exploited
Attack Characteristics
Attack Vector
Local
Attack Complexity
High
Privileges Required
Low
User Interaction
None
Confidentiality
High
Integrity
High
Availability
High
Published: May 8, 2026 (6 days ago)
Last Modified: May 8, 2026
Vendor: Red Hat
Source: REDHAT

Description

A flaw was found in the libceph component of the Linux kernel. This vulnerability occurs in the ceph_monmap_decode() function due to incorrect handling of non-negative values, where int variables are used instead of u32 for blob_len and num_mon. An attacker could exploit this by sending a specially crafted message with an excessively large num_mon value. This could lead to an attempt to allocate a very large amount of memory, resulting in a Denial of Service (DoS) condition.

CWE

CWE-681

Affected Products

Red Hat Enterprise Linux 10Red Hat Enterprise Linux 6Red Hat Enterprise Linux 7Red Hat Enterprise Linux 8Red Hat Enterprise Linux 9

References

🔗 bugzilla.redhat.com 🔗 www.cve.org 🔗 nvd.nist.gov 🔗 lore.kernel.org