SB20260720341 - Integer overflow in Linux kernel scsi driver

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Main Vulnerability Database SB20260720341

SB20260720341 - Integer overflow in Linux kernel scsi driver

Published: July 20, 2026

Security Bulletin ID SB20260720341
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Adjecent network
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Integer overflow (CVE-ID: CVE-2026-63889)

CWE-ID: CWE-190 - Integer overflow

CVSSv4: 7.1 [CVSS:4.0/AV:A/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 an infinite loop caused by an integer truncation error in the FPIN pname walker in scsi_transport_fc when processing a crafted FPIN ELS frame. A remote attacker can send a crafted Fibre Channel fabric frame to cause a denial of service.

Exploitation requires the ability to inject Fibre Channel fabric traffic to an lpfc or qla2xxx Linux initiator, such as from a compromised switch or fabric controller, or from a same-zone N_Port on a fabric that permits source spoofing.


Remediation

Install update from vendor's website.

References