SB20260918363 - Use-after-free in Linux kernel hw erdma driver
Published: September 18, 2026
Security Bulletin ID
SB20260918363
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-90309)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 6.8 [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]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to use-after-free in the ERDMA completion queue handling when EQ handlers invoke completion or error callbacks after a completion queue has been destroyed. A local user can race completion queue destruction with EQ event processing to cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/05b8ca493dd02319bca93c640b259c2ba51ef321
- https://git.kernel.org/stable/c/1fc9c1933959d2776a1ce7bf424251b8b5b586cd
- https://git.kernel.org/stable/c/4545f355654d044d35a31cd01cc46f491a8a7c36
- https://git.kernel.org/stable/c/610ef81797bb4f709e8675c1d8d093bb9ccdcbd8
- https://git.kernel.org/stable/c/98df2aee1459ee1c62c70cbe9b370d2a532aea36
- https://git.kernel.org/stable/c/c0a83f29a24c7e7f8516630848ef6db4c174deed