SB2026091340 - Reliance on undefined behavior in Linux kernel dsa realtek driver
Published: September 13, 2026
Security Bulletin ID
SB2026091340
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Information disclosure
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Reliance on undefined behavior (CVE-ID: CVE-2026-80999)
CWE-ID: CWE-758 - Reliance on Undefined, Unspecified, or Implementation-Defined Behavior
CVSSv4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local privileged user to trigger a kernel warning.
The vulnerability exists due to improper GPIO API selection in the rtl83xx_reset_assert() and rtl83xx_reset_deassert() helpers when handling reset GPIOs controlled by sleeping controllers. A local privileged user can trigger device probing with such a GPIO configuration to trigger a kernel warning.
Remediation
Install update from vendor's website.