SB2026102377 - Out-of-bounds read in Linux kernel broadcom bnxt driver

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Main Vulnerability Database SB2026102377

SB2026102377 - Out-of-bounds read in Linux kernel broadcom bnxt driver

Published: October 23, 2026

Security Bulletin ID SB2026102377
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Out-of-bounds read (CVE-ID: CVE-2026-99081)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local user to cause a denial of service through network transmit queue timeouts.

The vulnerability exists due to an out-of-bounds read in the Linux kernel bnxt_en driver's bnxt_start_xmit() function when transmitting small packets whose padded length exceeds their DMA mapping length. A local user can trigger transmission of small packets with data positioned near a page boundary to cause the NIC to read beyond the DMA-mapped region, triggering IOMMU faults and transmit queue timeouts.


Remediation

Install update from vendor's website.

References