Strix
64.1K

CVE-2026-89509

Unknown

Last modified

CVE-2026-89509 is a vulnerability of currently unknown severity. 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..

Description

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.

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= ea4c399642b85dc30f44d90ee805c6a18fa03062, < c98197ee3cd28288da13dc9881bb9e74daa7cbbc; >= ea4c399642b85dc30f44d90ee805c6a18fa03062, < 08b8630b557828aedb1d9ef0a6e2ec421f334ee2; >= ea4c399642b85dc30f44d90ee805c6a18fa03062, < cf3ebd89e754015625fee90aa938f6bc79a2c974
LinuxLinux6.18

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-89509?
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.
How severe is CVE-2026-89509?
Severity scoring for CVE-2026-89509 is pending analysis.
How do I fix CVE-2026-89509?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

How Strix Helps

Related CVEs from 2026

View all 2026CVEs →

Are you affected by CVE-2026-89509?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST