SB20260816511 - Out-of-bounds write in Linux kernel block drbd driver

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Main Vulnerability Database SB20260816511

SB20260816511 - Out-of-bounds write in Linux kernel block drbd driver

Published: August 16, 2026

Security Bulletin ID SB20260816511
CSH Severity
High
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

High 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Out-of-bounds write (CVE-ID: CVE-2026-72014)

CWE-ID: CWE-787 - Out-of-bounds write

CVSSv4: 8.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to corrupt kernel memory.

The vulnerability exists due to an out-of-bounds write in recv_dless_read() when processing a crafted P_DATA_REPLY from a DRBD peer. A remote attacker can send a specially crafted data reply to corrupt kernel memory.

A node that reads from its peer, such as a diskless node or a node using read-balancing to the peer, is exposed in the default configuration. A man-in-the-middle DRBD peer can also exploit the issue.


Remediation

Install update from vendor's website.

References