SB20261007135 - Out-of-bounds write in Linux kernel scsi driver

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Main Vulnerability Database SB20261007135

SB20261007135 - Out-of-bounds write in Linux kernel scsi driver

Published: October 7, 2026

Security Bulletin ID SB20261007135
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Physical access
Highest impact Code execution

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Out-of-bounds write (CVE-ID: CVE-2026-98232)

CWE-ID: CWE-787 - Out-of-bounds write

CVSSv4: 5.4 [CVSS:4.0/AV:P/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows an attacker with physical access to execute arbitrary code and disclose sensitive information.

The vulnerability exists due to out-of-bounds reads and writes in scsi_cdl_enable() in drivers/scsi/scsi.c when processing target-supplied MODE SENSE length fields. An attacker with physical access can supply crafted MODE SENSE responses through a USB storage device that identifies as an ATA device and advertises CDL support to execute arbitrary code and disclose sensitive information.

Exploitation is reachable during automatic device scanning without a filesystem mount or userspace access to the block device. Code execution was demonstrated using a build-specific, one-vCPU QEMU/Raw Gadget proof with QEMU-only multi-UDC allocator sampling, while KASLR and NX were enabled.


Remediation

Install update from vendor's website.

References