CVE-2026-89505
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.
Affected versions
Linux kernel versions
7.1
and later are affected. Fixed in
7.2.4,
7.3-rc1
and their respective stable series.
References
2 totalFrequently asked questions
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What is CVE-2026-89505?
CVE-2026-89505 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 7.1 onward and has been patched in 7.2.4 and 7.3-rc1. CVE-2026-89505 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-89505?
Yes. CVE-2026-89505 has been patched. Fixed versions include 7.2.4 and 7.3-rc1. If you are running Linux kernel 7.1 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-89505 actively exploited?
No. CVE-2026-89505 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.