microsoft/ebpf-for-windows Release-v1.1.0

Release-v1.1.0

Repository: microsoft/ebpf-for-windows

Tag: Release-v1.1.0

Published: 2026-03-25T00:53:02Z

Prerelease: yes

Release notes:

Highlights

This is the first stable release of eBPF for Windows following the v1.0.0 release candidates. The important changes include:

• Custom Maps: eBPF extensions can now register and implement their own custom map types via custom map types via ebpf_base_map_provider_dispatch_table_t, enabling extension-specific map entry handling.
• Synchronous Ring Buffer and Perf Event Array APIs: Implements libbpf-compatible synchronous APIs for both ring buffer (ring_buffer__poll, ring_buffer__consume) and perf event array (perf_buffer__poll, perf_buffer__consume) maps.
• Accept and Bind Hook Hard/Soft Permit: Accept and bind hooks now support hard and soft permit verdicts (extending connect hook support from v1.0), giving control over whether subsequent hook programs/filters can override a permit decision.
• Epoch Memory Improvements: Replaced InterlockedCompareExchange64 with ReadAcquire64 for published epoch reads, eliminating LOCK-prefix cache-line contention (4–43% benchmark improvement). Also fixed a per-CPU epoch skew bug and wrapped remaining async completion code paths in epoch logic.

What's Changed

• updated list of maintainers. by @shankarseal in https://github.com/microsoft/ebpf-for-windows/pull/4746
• update WDK version to 10.0.26100.6584 by @shankarseal in https://github.com/microsoft/ebpf-for-windows/pull/4752
• update version to 1.1.0 and other miscellaneous changes. by @shankarseal in https://github.com/microsoft/ebpf-for-windows/pull/4723
• wont fix policy. by @shankarseal in https://github.com/microsoft/ebpf-for-windows/pull/4753
• fix bpf-conformance version path for onebranch by @mikeagun in https://github.com/microsoft/ebpf-for-windows/pull/4754
• Exposing result helpers to be consumable by extensions by @nmlud21 in https://github.com/microsoft/ebpf-for-windows/pull/4733
• Optimize nested map operations by @saxena-anurag in https://github.com/microsoft/ebpf-for-windows/pull/4684
• Update usersim submodule to latest by @saxena-anurag in https://github.com/microsoft/ebpf-for-windows/pull/4792
• Add implementation for RtlUTF8StringToUnicodeString by @saxena-anurag in https://github.com/microsoft/ebpf-for-windows/pull/4793
• Fix for #4647 - Bugcheck in eBPFCore by @kumarvin123 in https://github.com/microsoft/ebpf-for-windows/pull/4790
• Add metadata file by @saxena-anurag in https://github.com/microsoft/ebpf-for-windows/pull/4798
• Update procDump checksum by @LakshK98 in https://github.com/microsoft/ebpf-for-windows/pull/4836
• Added KM test to test load/unload of sample drivers by @nmlud21 in https://github.com/microsoft/ebpf-for-windows/pull/4830
• Increase test timeout for stress tests. by @saxena-anurag in https://github.com/microsoft/ebpf-for-windows/pull/4771
• Re-enable regression tests using v1.0.0-rc1 by @mikeagun in https://github.com/microsoft/ebpf-for-windows/pull/4838
• Fix ensure-issue-linked workflow 403 error when commenting on PRs by @Copilot in https://github.com/microsoft/ebpf-for-windows/pull/4762
• Fixes: #4702 - The cilium_tests should be changed to work without the… by @kumarvin123 in https://github.com/microsoft/ebpf-for-windows/pull/4860
• _ebpf_object_load_native: wait until service is deleted on error by @lmb in https://github.com/microsoft/ebpf-for-windows/pull/4785
• Fix path quoting in Install-eBPFComponents and Uninstall-eBPFComponents by @lmb in https://github.com/microsoft/ebpf-for-windows/pull/4805
• Updated build platform path by @nmlud21 in https://github.com/microsoft/ebpf-for-windows/pull/4859
• Fixed incorrect invocation of netsh during ebpf install by @nmlud21 in https://github.com/microsoft/ebpf-for-windows/pull/4858
• Extension Code Deduplication Doc by @LakshK98 in https://github.com/microsoft/ebpf-for-windows/pull/4806
• Fix ETL collection for driver tests by @matthewige in https://github.com/microsoft/ebpf-for-windows/pull/4872
• Hold program information provider rundown reference while using program information by @Alan-Jowett in https://github.com/microsoft/ebpf-for-windows/pull/4877
• Fix VM expiry issue by @matthewige in https://github.com/microsoft/ebpf-for-windows/pull/4871
• Fixes #4706: Bring back XDP Mock provider and test XDP programs by @kumarvin123 in https://github.com/microsoft/ebpf-for-windows/pull/4878
• Accept hook hard permit support by @mikeagun in https://github.com/microsoft/ebpf-for-windows/pull/4800
• Mark load_all_sample_programs as mandatory by @nmlud21 in https://github.com/microsoft/ebpf-for-windows/pull/4880
• Let check-pr workflow inherit permissions by @dthaler in https://github.com/microsoft/ebpf-for-windows/pull/4848
• bind hook hard/soft permit support by @mikeagun in https://github.com/microsoft/ebpf-for-windows/pull/4886
• Add automatic issue creation on netperf workflow failure by @Copilot in https://github.com/microsoft/ebpf-for-windows/pull/4903
• Ensure that all comments are complete sentences as per guidelines by @Alan-Jowett in https://github.com/microsoft/ebpf-for-windows/pull/4760
• Pickup latest verifier by @Alan-Jowett in https://github.com/microsoft/ebpf-for-windows/pull/4844
• Add proposal for bpf_sock_ops_get_flow_id by @Alan-Jowett in https://github.com/microsoft/ebpf-for-windows/pull/4769
• Update submodules: pe-parse and kissfft by @Alan-Jowett in https://github.com/microsoft/ebpf-for-windows/pull/4907
• Extend api_tests to test all exported eBPF APIs with comprehensive validation by @Copilot in https://github.com/microsoft/ebpf-for-windows/pull/4606
• Add ErrorActionPreference to initialize_ebpf_repo.ps1 by @prince-melvin in https://github.com/microsoft/ebpf-for-windows/pull/4928
• Fix links to CONTRIBUTING.md in markdown by @mtfriesen in https://github.com/microsoft/ebpf-for-windows/pull/4918
• Publish proposal for connect authorization layer by @Alan-Jowett in https://github.com/microsoft/ebpf-for-windows/pull/4767
• Fix invalid 'permissions: inherit' syntax with explicit permissions in workflows by @Copilot in https://github.com/microsoft/ebpf-for-windows/pull/4930
• Refine issue prioritization criteria in Governance.md by @mingxr in https://github.com/microsoft/ebpf-for-windows/pull/4667
• Skip updating lru hotlist for user mode map reads by @mikeagun in https://github.com/microsoft/ebpf-for-windows/pull/4893
• Fix UAF in epoch work item: add epoch protection to map delete functions by…