Out-of-bounds write in Linux kernel - CVE-2026-72014

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Main Vulnerability Database Vulnerabilities #VU143576

Out-of-bounds write in Linux kernel - CVE-2026-72014

Published: August 16, 2026


Vulnerability identifier: #VU143576
CSH Severity: High
CVSS v4: 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]
CVE-ID: CVE-2026-72014
CWE-ID: CWE-787
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

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.


Affected software

Linux kernel
Ubuntu
linux (Ubuntu package)
linux-gcp (Ubuntu package)

How to mitigate CVE-2026-72014

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
linux (Ubuntu package) - addressed in versions 7.0.0-34.34, 7.0.0-34.34.1, 7.0.0-34.34~24.04.1, 7.0.0-1012.12~24.04.1, 7.0.0-1013.13, 7.0.0-1013.13~24.04.1, 7.0.0-1014.14, 7.0.0-1020.20
linux-gcp (Ubuntu package) - addressed in versions 7.0.0-1013.13, 7.0.0-1013.13~24.04.1, 7.0.0-1014.14

External References

Related Security Bulletins