SB2026090590 - Use-after-free in Linux kernel sw rxe driver
Published: September 5, 2026
Security Bulletin ID
SB2026090590
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-2026-80864)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/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 RDMA/rxe responder resource handling when modifying IB_QP_MAX_DEST_RD_ATOMIC while the responder task is active. A local user can race the freeing and reallocation of rd_atomic resources to cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/0136b528b753c5a56e4d997ef20b86bb6750b8fb
- https://git.kernel.org/stable/c/60dfd47929cd1e7070daa810d40ce538d888410d
- https://git.kernel.org/stable/c/6f7014237405e7f032b5c53a82d9eccf6161c291
- https://git.kernel.org/stable/c/d4cd32eb8bd2b0ffbdc7b1f3d82ce6a371f8f844
- https://git.kernel.org/stable/c/ffa4f0be69656be1755090f02db38d49816585c6