SB2026072847 - Use-after-free in Linux kernel nvme target driver

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Main Vulnerability Database SB2026072847

SB2026072847 - Use-after-free in Linux kernel nvme target driver

Published: July 28, 2026

Security Bulletin ID SB2026072847
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Use-after-free (CVE-ID: CVE-2026-64535)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote user to cause a denial of service.

The vulnerability exists due to a use-after-free in the NVMe/TCP target digest error handling in nvmet_tcp_try_recv_ddgst() and queue teardown logic when processing a digest mismatch on a non-final H2C_DATA PDU during an R2T-based data transfer. A remote user can trigger a digest mismatch to cause a denial of service.

Exploitation requires data digest to be enabled on the NVMe/TCP connection.


Remediation

Install update from vendor's website.

References