CVE-2026-89509RDMA/ionic: Embed counter driver data in rdma_counter allocation
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: RDMA/ionic: Embed counter driver data in rdma_counter allocation Commit 7e53b31acc7f ("RDMA/core: Create and destroy rdma_counter using rdma_zalloc_drv_obj()") requires drivers implementing counter ops to embed struct rdma_counter in a driver-specific struct, register its size via INIT_RDMA_OBJ_SIZE, and provide a counter_init callback. The ionic driver was merged without this adaptation, causing a NULL pointer dereference in alloc_and_bind() since rdma_zalloc_drv_obj() allocates zero bytes when size_rdma_counter is unset. Consolidate struct ionic_counter into a new struct ionic_rdma_counter that embeds struct rdma_counter, replace the xarray with a lightweight ida for ID allocation, and add the required counter_init and INIT_RDMA_OBJ_SIZE declarations.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Sep 11, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from ea4c399642b85dc30f44d90ee805c6a18fa03062 before c98197ee3cd28288da13dc9881bb9e74daa7cbbc; from ea4c399642b85dc30f44d90ee805c6a18fa03062 before 08b8630b557828aedb1d9ef0a6e2ec421f334ee2; from ea4c399642b85dc30f44d90ee805c6a18fa03062 before cf3ebd89e754015625fee90aa938f6bc79a2c974 | CNA record |
References
- https://git.kernel.org/stable/c/c98197ee3cd28288da13dc9881bb9e74daa7cbbc
- https://git.kernel.org/stable/c/08b8630b557828aedb1d9ef0a6e2ec421f334ee2
- https://git.kernel.org/stable/c/cf3ebd89e754015625fee90aa938f6bc79a2c974
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.