CVE-2026-89505RDMA/uverbs: Guard legacy bundles without method_elm
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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.
- 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 7122ff96068a03595bde2fbafaca82ca2ed8084e before edae84e5461749ed9adf9fcf5c6e075381040ac3; 7122ff96068a03595bde2fbafaca82ca2ed8084e builds before 60a42d510113f46de47e86a84bf5758597644487 | CNA record |
References
- https://git.kernel.org/stable/c/edae84e5461749ed9adf9fcf5c6e075381040ac3
- https://git.kernel.org/stable/c/60a42d510113f46de47e86a84bf5758597644487
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.