SB20260918253 - Double free in Linux kernel hw cxgb4 driver
Published: September 18, 2026
Security Bulletin ID
SB20260918253
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Double free (CVE-ID: CVE-2026-90417)
CWE-ID: CWE-415 - Double Free
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 double free.
The vulnerability exists due to improper memory management in the RDMA/cxgb4 memory-registration error handling when processing DMA memory-region registration errors. A local user can trigger error handling to cause a double free.
Remediation
Install update from vendor's website.