SB20260928370 - Improper Check or Handling of Exceptional Conditions in Linux kernel broadcom bnxt driver

Description

This security bulletin contains information about 1 vulnerability.

1) Improper Check or Handling of Exceptional Conditions (CVE-ID: CVE-2026-97569)

CWE-ID: CWE-703 - Improper Check or Handling of Exceptional Conditions

CVSSv4: 6.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

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

The vulnerability exists due to improper handling of deferred completions in the bnxt_en transmit ring when handling transmit traffic with deferred completions. A remote attacker can send a burst of packets that fills the ring followed by a large software UDP segmentation offload packet that cannot fit to cause a denial of service.

Exploitation is possible with rings containing 457 or fewer descriptors under the default CONFIG_MAX_SKB_FRAGS configuration.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/39b23c1c40e1f73d2b94a09282cc476af647e438
• https://git.kernel.org/stable/c/e33ce547c0cd40738d6bad23e5fc0539ee3e8f7d