SB2026051452 - Improper Check or Handling of Exceptional Conditions in Linux kernel usb host driver

Description

This security bulletin contains information about 1 vulnerability.

1) Improper Check or Handling of Exceptional Conditions (CVE-ID: CVE-2026-43488)

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

CVSSv4: 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/E:U/U:Clear

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper error handling in xhci_irq() when handling a host controller error during UAS storage device plug/unplug scenarios. A local user can trigger repeated device plug/unplug events to cause a denial of service.

The issue can result in an interrupt storm that leads to severe system-level faults.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/09ff0099c6cf148ff1f7053b5b6c84beb1c2ef8d
• https://git.kernel.org/stable/c/6f91f3f087194c114d6d8ea4591b850bb00672f8
• https://git.kernel.org/stable/c/b2dd9abf8c06cfcbcf242321fd54ae51a4807705
• https://git.kernel.org/stable/c/cd41e0d1df8fcf5eae294657da52b50d1ce03246
• https://git.kernel.org/stable/c/d6d5febd12452b7fd951fdd15c3ec262f01901a4