Out-of-bounds write in Linux kernel - CVE-2026-64273

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Main Vulnerability Database Vulnerabilities #VU139718

Out-of-bounds write in Linux kernel - CVE-2026-64273

Published: July 27, 2026


Vulnerability identifier: #VU139718
CSH Severity: Medium
CVSS v4: 5.2 [CVSS:4.0/AV:P/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-64273
CWE-ID: CWE-787
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows an attacker with physical access to corrupt kernel memory.

The vulnerability exists due to an out-of-bounds write in iforce_process_packet() when processing a device-reported force-feedback status packet. An attacker with physical access can supply a crafted device payload with an out-of-range effect index to corrupt kernel memory.

The issue affects both USB interrupt endpoint and serio transports, and the status handling path is not gated on force-feedback support being present.


Affected software

Linux kernel
Ubuntu
linux (Ubuntu package)
linux-gcp-7.0 (Ubuntu package)
linux-oem-7.0 (Ubuntu package)

How to mitigate CVE-2026-64273

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
linux (Ubuntu package) - addressed in versions 7.0.0-31.31, 7.0.0-31.31.1, 7.0.0-31.31~24.04.1, 7.0.0-1006.7, 7.0.0-1011.11~24.04.1, 7.0.0-1012.12, 7.0.0-1012.12~24.04.1
linux-gcp-7.0 (Ubuntu package) - update to 7.0.0-1011.11~24.04.1
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1013.13

External References

Related Security Bulletins