Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: RDMA/erdma: Hold QP references for AE and CM processing AE QP fatal events and iWARP CM paths load QPs from dev->qp_xa and then use or reference them outside the xarray lock. erdma_destroy_qp() can drop the destroy-path reference and free QP resources while such a lookup is in flight. Add erdma_qp_get_by_qpn() to acquire a kref under the xarray lock with kref_get_unless_zero(). Remove the QP from the xarray before dropping the destroy-path reference so no new lookup can acquire it while destruction waits for existing users.
CVSS Score
HIGH
References
- https://git.kernel.org/stable/c/6e32f84b63c054e09392153125d7202abab2d14b
- https://git.kernel.org/stable/c/a52eeff32024f190b3bdc99088c7becccd4fa60b
- https://git.kernel.org/stable/c/c92686867638cda954fdb2bdbac8a75e3aa6eaae
- https://git.kernel.org/stable/c/ec987c0654651036dad6a42f7fa2a6d7c16a3687
FAQ
What is CVE-2026-90308?
CVE-2026-90308 is a vulnerability with a CVSS score of 7.8 (HIGH). In the Linux kernel, the following vulnerability has been resolved: RDMA/erdma: Hold QP references for AE and CM processing AE QP fatal events and iWARP CM paths load QPs from dev->qp_xa and then us...
How severe is CVE-2026-90308?
CVE-2026-90308 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-90308?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.