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.
References6
- git.kernel.org/stable/c/233f1b7fe2980e4e238fe03dd3ceddfd082cb4c8
- git.kernel.org/stable/c/6e32f84b63c054e09392153125d7202abab2d14b
- git.kernel.org/stable/c/92101d7bd67cf313d65baede27118614a283f6bf
- git.kernel.org/stable/c/a52eeff32024f190b3bdc99088c7becccd4fa60b
- git.kernel.org/stable/c/c92686867638cda954fdb2bdbac8a75e3aa6eaae
- git.kernel.org/stable/c/ec987c0654651036dad6a42f7fa2a6d7c16a3687
Metrics
- CVSS 3.1
-
7.8
HIGH
Score source: CNA
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 6 · as of 8 November 2026
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