# Windows Subsystem for Linux 2.9.10

- Product: Windows Subsystem for Linux (https://whatsnew.fyi/product/wsl)
- Vendor: Microsoft
- Date: 2026-09-04
- Version: 2.9.10
- Original notes: https://github.com/microsoft/WSL/releases/tag/2.9.10
- Permalink: https://whatsnew.fyi/product/wsl/releases/2.9.10
- Labels: Pre-release

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

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- **fixed** — Fix tracked routes being collapsed by incomplete comparison
- **added** — Add github issue suggestion in user visible error
- **changed** — Match Docker output for prune operations and container inspection
- **fixed** — Fix two docker parser bugs in CLI mount
- **fixed** — Invalidate the TestImageRegistry cache after running prune --all
- **fixed** — Solve various issues found by verifier
- **changed** — Align alias listing with docker, Apple and other CLIs
- **changed** — Align container list format with Docker specifications
- **changed** — Add -f alias to --format on inspect commands for docker parity
- **added** — Add explicit per-command argument overrides
- **fixed** — Fix systemd-tmpfiles failure on systemd v261+ with systemd boot disabled
- **fixed** — Fix unvalidated TerminalProfileSize during distribution import
- **changed** — Bump WSL DeviceHost to 1.2.62
- **added** — Add wslc system info command
- **fixed** — Harden Windows macros against dangling-else ambiguity
- **fixed** — Fix dangling-else bugs in FAIL_FAST_IF and EMIT_USER_WARNING macros
- **fixed** — Resolve an issue preventing WSL from starting due to an MDE Plugin error

##### What's Changed
* wslc: consolidate size formatting on FormatHumanReadableSize by @ggarzia-MSFT in https://github.com/microsoft/WSL/pull/41429
* CLI: Add virtiofs mapshared regression test by @dkbennett in https://github.com/microsoft/WSL/pull/41427
* Fix tracked routes being collapsed by incomplete comparison by @chemwolf6922 in https://github.com/microsoft/WSL/pull/41393
* Add github issue suggestion in user visible error by @chemwolf6922 in https://github.com/microsoft/WSL/pull/41432
* Match Docker output for prune operations and container inspection by @ggarzia-MSFT in https://github.com/microsoft/WSL/pull/41430
* CLI: Mount PR followup & fix two docker parser bugs by @dkbennett in https://github.com/microsoft/WSL/pull/41436
* Invalidate the TestImageRegistry cache after running prune --all by @OneBlue in https://github.com/microsoft/WSL/pull/41442
* Solve various issues found by verifier by @OneBlue in https://github.com/microsoft/WSL/pull/41445
* CLI: Align alias listing with docker, Apple and other CLIs by @dkbennett in https://github.com/microsoft/WSL/pull/41439
* Align container list format with Docker specifications by @ggarzia-MSFT in https://github.com/microsoft/WSL/pull/41375
* wslc: alias -f to --format on inspect commands for docker parity by @ggarzia-MSFT in https://github.com/microsoft/WSL/pull/41463
* CLI: Add explicit per-command argument overrides by @dkbennett in https://github.com/microsoft/WSL/pull/41478
* Fix WSLC parser unit test argument overrides by @benhillis in https://github.com/microsoft/WSL/pull/41496
* Fix systemd-tmpfiles failure on systemd v261+ with systemd boot disabled by @chemwolf6922 in https://github.com/microsoft/WSL/pull/41491
* Fix unvalidated TerminalProfileSize during distribution import by @benhillis in https://github.com/microsoft/WSL/pull/41495
* Bump WSL DeviceHost to 1.2.62 by @damanm24 with @Copilot in https://github.com/microsoft/WSL/pull/41499
* Enable unity build repo-wide via WSL_UNITY_BATCH_SIZE by @ggarzia-MSFT in https://github.com/microsoft/WSL/pull/41441
* Add wslc system info command by @beena352 in https://github.com/microsoft/WSL/pull/41408
* Harden Windows macros against dangling-else ambiguity by @Eamon2009 in https://github.com/microsoft/WSL/pull/41513
* Fix dangling-else bugs in FAIL_FAST_IF and EMIT_USER_WARNING macros by @Eamon2009 in https://github.com/microsoft/WSL/pull/41504
* Wslc events by @kvega005 in https://github.com/microsoft/WSL/pull/40971
* Resolve an issue preventing WSL from starting due to an MDE Plugin error

##### New Contributors
* @tega-ajise made their first contribution in https://github.com/microsoft/WSL/pull/41509

**Full Changelog**: https://github.com/microsoft/WSL/compare/2.9.9...2.9.10