SB2026072104 - Improper handling of exceptional conditions in Linux kernel realtek rtw88 driver

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Main Vulnerability Database SB2026072104

SB2026072104 - Improper handling of exceptional conditions in Linux kernel realtek rtw88 driver

Published: July 21, 2026

Security Bulletin ID SB2026072104
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Partial DoS

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Improper handling of exceptional conditions (CVE-ID: CVE-2026-63821)

CWE-ID: CWE-755 - Improper Handling of Exceptional Conditions

CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]


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

The vulnerability exists due to improper exception handling in rtw_usb_write_data() and rtw_usb_tx_agg_skb() when handling USB write submission failures. A local user can trigger a USB write failure to cause a denial of service.

The issue can be triggered during device disconnect or reconnect scenarios and under memory pressure conditions.


Remediation

Install update from vendor's website.

References