SB20260508124 - Out-of-bounds read in Linux kernel ceph

CSH
CYBERSECURITY HELP
Sign In REGISTER

Main Vulnerability Database SB20260508124

SB20260508124 - Out-of-bounds read in Linux kernel ceph

Published: May 8, 2026

Security Bulletin ID SB20260508124
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Information disclosure

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Out-of-bounds read (CVE-ID: CVE-2026-43406)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green


The vulnerability allows a remote attacker to disclose sensitive information.

The vulnerability exists due to an out-of-bounds read in process_message_header() when processing a maliciously corrupted message frame. A remote attacker can send a specially crafted message frame to disclose sensitive information.

The issue can be triggered if the control segment length is smaller than the message header size or if a different frame is made to appear as a message frame.


Remediation

Install update from vendor's website.

References