CVE-2026-89505
Description
In the Linux kernel, the following vulnerability has been resolved: RDMA/uverbs: Guard legacy bundles without method_elm The legacy write() path dispatches through a uverbs_api_write_method, but the uverbs_attr_bundle passed to provider code does not have an ioctl method element. If malformed provider input causes the common uverbs validation code to emit an error message, uverbs_get_handler_fn() dereferences the uninitialized method_elm pointer. Initialize method_elm explicitly for legacy bundles and make uverbs_get_handler_fn() return NULL when no ioctl method is present. The legacy dispatcher continues to use its local write method, while the ioctl path continues to use the registered ioctl handler.
How to fix
- Linux Linuxedae84e5461749ed9adf9fcf5c6e075381040ac3, 60a42d510113f46de47e86a84bf5758597644487 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 7122ff96068a03595bde2fbafaca82ca2ed8084e ≤ v < edae84e5461749ed9adf9fcf5c6e075381040ac3, 7122ff96068a03595bde2fbafaca82ca2ed8084e ≤ v < 60a42d510113f46de47e86a84bf5758597644487, 7.1 | edae84e5461749ed9adf9fcf5c6e075381040ac3, 60a42d510113f46de47e86a84bf5758597644487 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.