SB20260905158 - Allocation of Resources Without Limits or Throttling in Linux kernel nvme target driver

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Main Vulnerability Database SB20260905158

SB20260905158 - Allocation of Resources Without Limits or Throttling in Linux kernel nvme target driver

Published: September 5, 2026

Security Bulletin ID SB20260905158
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) Allocation of Resources Without Limits or Throttling (CVE-ID: CVE-2026-80789)

CWE-ID: CWE-770 - Allocation of Resources Without Limits or Throttling

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


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

The vulnerability exists due to uncontrolled resource allocation in nvmet_tcp_map_data() when processing write commands containing non-inline transport SGL data-block descriptors. A remote attacker can submit a crafted NVMe/TCP command with an oversized SGL length to cause a denial of service.

For write commands, the target waits for host data after issuing an R2T response.


Remediation

Install update from vendor's website.

References