SB20260918386 - Double free in Linux kernel phy renesas driver
Published: September 18, 2026
Security Bulletin ID
SB20260918386
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) Double free (CVE-ID: CVE-2026-90288)
CWE-ID: CWE-415 - Double Free
CVSSv4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to trigger a double free.
The vulnerability exists due to improper device tree node reference management in the Renesas R-Car Gen2 PHY driver's rcar_gen2_phy_probe function when handling a PHY creation failure. A local user can trigger the PHY creation failure to trigger a double free.
Remediation
Install update from vendor's website.