# Blender Blender 4.5.8 LTS Maintenance Release !

- Product: Blender (https://whatsnew.fyi/product/blender)
- Vendor: Blender Foundation
- Date: 2026-03-17
- Original notes: https://store.steampowered.com/news/app/365670/view/518615049848226791
- Permalink: https://whatsnew.fyi/product/blender/releases/2026-03-17-blender-4.5.8-lts-maintenance-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'.

---

- **fixed** — Sculpting shapekey solo breaking undo steps
- **fixed** — Crash when quickly scrolling objects with modifier panels visible
- **fixed** — Assertion failure when moving keyframe in graph editor beyond enum range
- **fixed** — Focus distance not dropping keyframe automatically when picked while keyed with auto keyframe enabled
- **fixed** — Crash when joining a rig into another rig that is parented into another rig
- **fixed** — Lineart modifier using freed or invalid triangle data
- **fixed** — Correctly set new action user count to 0
- **fixed** — Principled BDSF to shader to RGB breaking when using both sheen and subsurface scattering
- **fixed** — Lag with grease pencil hook modifier due to dependency issue
- **fixed** — Error loading SGI image with 2 bytes per pixel RLE with potential out of bounds read
- **fixed** — Boundary brush symmetry bug
- **fixed** — Linear burn blend mode support in paint
- **fixed** — Assertion failure while closing Blender after rendering smoke simulation

Blender 4.5.8 LTS features important bug fixes. It is released on the _v4.5 - Stable - LTS_ branch.  You can switch to this by **right-clicking** on the **Blender** entry in your library, select **Properties...**. Open the **Betas** tab and select **v4.5 - Stable - Stable**.

##### Patch Notes

* Regression: Sculpting: Shapekey Solo breaks undo steps. ([#153226](https://projects.blender.org/blender/blender/issues/153226))
* Crash when quickly scrolling objects with modifier panels visible. ([#154087](https://projects.blender.org/blender/blender/issues/154087))
* Assertion Failure: Moving Keyframe in Graph Editor beyond enum range. ([#82669](https://projects.blender.org/blender/blender/issues/82669))
* When picking a focus distance while it's keyed + auto keyframe on, it doesn't drop a keyframe automatically. ([#154399](https://projects.blender.org/blender/blender/issues/154399))
* Blender suddenly crashed when trying to join a rig into another a rig that is parented into another a rig. ([#154651](https://projects.blender.org/blender/blender/issues/154651))
* Lineart Modifier seemingly using free()'d/invalid triangle data. ([#154632](https://projects.blender.org/blender/blender/issues/154632))
* Fix: Correctly set new action user count to 0. ([9663231430f](https://projects.blender.org/blender/blender/commit/9663231430f))
* Principled BDSF to Shader to RGB breaks when using both sheen and subsurface scattering. ([#154962](https://projects.blender.org/blender/blender/issues/154962))
* Odd lag with Grease Pencil Hook Modifier - dependency issue?. ([#153137](https://projects.blender.org/blender/blender/issues/153137))
* Error loading SGI image with 2 bytes per pixel, RLE (assertion, potential out of bounds read). ([#155162](https://projects.blender.org/blender/blender/issues/155162))
* Boundary brush symmetry bug. ([#154678](https://projects.blender.org/blender/blender/issues/154678))
* Paint: Linear Burn not supported. ([#155207](https://projects.blender.org/blender/blender/issues/155207))
* Assertion failure while closing Blender after rendering smoke simulation. ([#155341](https://projects.blender.org/blender/blender/issues/155341))

For a detailed list of bug fixes in each release, see [ 4.5 LTS releases on blender.org](https://www.blender.org/download/lts/4-5/)

##### LTS Program

Learn more about the [LTS program on blender.org](https://www.blender.org/download/lts/)

##### Stay up-to-date

You can follow Blender on social media:

Keep reporting any issues you find to make this LTS the most stable release ever !

Happy blending,
The Blender team