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[release/2.3] Prepare release notes for v2.3.3#13750

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Jul 9, 2026
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[release/2.3] Prepare release notes for v2.3.3#13750
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@chrishenzie chrishenzie commented Jul 9, 2026

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containerd 2.3.3

Welcome to the v2.3.3 release of containerd!

The third patch release for containerd 2.3 contains various fixes and updates.

Highlights

  • Set SystemTemp environment variable on Windows so temp directory overrides work for SYSTEM services (#13694)

Container Runtime Interface (CRI)

  • Fix nil pointer dereference in NRI GetIPs during pod sandbox teardown or container exit (#13697)
  • Reject CreateContainer calls when the target sandbox is not running (#13668)
  • Ensure sandbox shutdown on RunPodSandbox hook failures to avoid mount leaks (#13645)

Image Distribution

  • Surface OCI error bodies in registry 403 responses by falling back to GET requests (#13738)

Snapshotters

  • Align default 4K mkfs block size for EROFS across all platforms (#13632)

Please try out the release binaries and report any issues at
https://github.com/containerd/containerd/issues.

Contributors

  • Maksym Pavlenko
  • Samuel Karp
  • Chris Henzie
  • Phil Estes
  • Sebastiaan van Stijn
  • Akihiro Suda
  • Austin Vazquez
  • Chris Crone
  • Derek McGowan
  • Maksim An
  • crawfordxx
  • cshung
  • lauralorenz

Changes

14 commits

  • Prepare release notes for v2.3.3 (#13750)
  • CI: migrate Vagrant to Lima (#13744)
  • remotes: surface OCI error body in registry 4xx responses (#13738)
    • 457fba3a3 remotes: surface OCI error body on HEAD 403 via GET fallback
  • Update go to 1.26.5 (#13732)
  • ci: pin fog-json to resolve gem conflict (#13711)
    • 5be0495df ci: pin fog-json to resolve gem conflict
  • Fix nil pointer dereference in NRI GetIPs (#13697)
    • 36c713971 Fix nil pointer dereference in NRI GetIPs
  • Set SystemTemp env var to config temp on Windows (#13694)
    • 26dce170d Set SystemTemp env var to config temp on Windows
  • update runhcs to v0.15.0-rc.3 (#13693)
  • Update to current setup-go version (#13686)
    • 3e97edeb7 Update to current setup-go version
  • cri: reject CreateContainer when sandbox is not running (#13668)
    • 8856b0f9c cri: reject CreateContainer when sandbox is not running
  • update runhcs to v0.15.0-rc.2 (#13666)
  • test: fix flaky image timestamp check on coarse clocks (#13643)
    • 168d56783 test: fix flaky image timestamp check on coarse clocks
  • Add defer in event of mid-function failures in RunPodSandbox to avoid mount leaks (#13645)
    • d1db61db8 Add deferred call to ShutdownSandbox to avoid leaks
  • erofs: align default mkfs block size across platforms (#13632)
    • 01b0f03f6 erofs: align default mkfs block size across platforms

Dependency Changes

This release has no dependency changes

Previous release can be found at v2.3.2

Which file should I download?

  • containerd-<VERSION>-<OS>-<ARCH>.tar.gz: ✅Recommended. Dynamically linked with glibc 2.35 (Ubuntu 22.04).
  • containerd-static-<VERSION>-<OS>-<ARCH>.tar.gz: Statically linked. Expected to be used on Linux distributions that do not use glibc >= 2.35. Not position-independent.

In addition to containerd, typically you will have to install runc
and CNI plugins from their official sites too.

See also the Getting Started documentation.

@chrishenzie
chrishenzie marked this pull request as draft July 9, 2026 18:00
@chrishenzie
chrishenzie marked this pull request as ready for review July 9, 2026 21:29
@github-project-automation github-project-automation Bot moved this from Needs Triage to Review In Progress in Pull Request Review Jul 9, 2026
@fuweid
fuweid merged commit aad1100 into containerd:release/2.3 Jul 9, 2026
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@github-project-automation github-project-automation Bot moved this from Review In Progress to Done in Pull Request Review Jul 9, 2026
@chrishenzie
chrishenzie deleted the prepare-v2.3.3 branch July 10, 2026 00:17
jaredledvina added a commit to DataDog/containerd that referenced this pull request Jul 13, 2026
containerd 2.3.3

Welcome to the v2.3.3 release of containerd!

The third patch release for containerd 2.3 contains various fixes and updates.

### Highlights

* Set SystemTemp environment variable on Windows so temp directory overrides work for SYSTEM services ([containerd#13694](containerd#13694))

#### Container Runtime Interface (CRI)

* Fix nil pointer dereference in NRI GetIPs during pod sandbox teardown or container exit ([containerd#13697](containerd#13697))
* Reject CreateContainer calls when the target sandbox is not running ([containerd#13668](containerd#13668))
* Ensure sandbox shutdown on RunPodSandbox hook failures to avoid mount leaks ([containerd#13645](containerd#13645))

#### Image Distribution

* Surface OCI error bodies in registry 403 responses by falling back to GET requests ([containerd#13738](containerd#13738))

#### Snapshotters

* Align default 4K mkfs block size for EROFS across all platforms ([containerd#13632](containerd#13632))

Please try out the release binaries and report any issues at
https://github.com/containerd/containerd/issues.

### Contributors

* Maksym Pavlenko
* Samuel Karp
* Chris Henzie
* Phil Estes
* Sebastiaan van Stijn
* Akihiro Suda
* Austin Vazquez
* Chris Crone
* Derek McGowan
* Maksim An
* crawfordxx
* cshung
* lauralorenz

### Changes
<details><summary>14 commits</summary>
<p>

* Prepare release notes for v2.3.3 ([containerd#13750](containerd#13750))
  * [`7f6cee02a`](containerd@7f6cee0) Prepare release notes for v2.3.3
* CI: migrate Vagrant to Lima ([containerd#13744](containerd#13744))
  * [`7316210ce`](containerd@7316210) CI: migrate Vagrant to Lima
* remotes: surface OCI error body in registry 4xx responses ([containerd#13738](containerd#13738))
  * [`457fba3a3`](containerd@457fba3) remotes: surface OCI error body on HEAD 403 via GET fallback
* Update go to 1.26.5 ([containerd#13732](containerd#13732))
  * [`dc2df934e`](containerd@dc2df93) Update go to 1.26.5
* ci: pin fog-json to resolve gem conflict ([containerd#13711](containerd#13711))
  * [`5be0495df`](containerd@5be0495) ci: pin fog-json to resolve gem conflict
* Fix nil pointer dereference in NRI GetIPs ([containerd#13697](containerd#13697))
  * [`36c713971`](containerd@36c7139) Fix nil pointer dereference in NRI GetIPs
* Set SystemTemp env var to config temp on Windows ([containerd#13694](containerd#13694))
  * [`26dce170d`](containerd@26dce17) Set SystemTemp env var to config temp on Windows
* update runhcs to v0.15.0-rc.3 ([containerd#13693](containerd#13693))
  * [`9bc2c2349`](containerd@9bc2c23) update runhcs to v0.15.0-rc.3
* Update to current setup-go version ([containerd#13686](containerd#13686))
  * [`3e97edeb7`](containerd@3e97ede) Update to current setup-go version
* cri: reject CreateContainer when sandbox is not running ([containerd#13668](containerd#13668))
  * [`8856b0f9c`](containerd@8856b0f) cri: reject CreateContainer when sandbox is not running
* update runhcs to v0.15.0-rc.2 ([containerd#13666](containerd#13666))
  * [`ae796cec5`](containerd@ae796ce) update runhcs to v0.15.0-rc.2
* test: fix flaky image timestamp check on coarse clocks ([containerd#13643](containerd#13643))
  * [`168d56783`](containerd@168d567) test: fix flaky image timestamp check on coarse clocks
* Add defer in event of mid-function failures in RunPodSandbox to avoid mount leaks ([containerd#13645](containerd#13645))
  * [`d1db61db8`](containerd@d1db61d) Add deferred call to ShutdownSandbox to avoid leaks
* erofs: align default mkfs block size across platforms ([containerd#13632](containerd#13632))
  * [`01b0f03f6`](containerd@01b0f03) erofs: align default mkfs block size across platforms
</p>
</details>

### Dependency Changes

This release has no dependency changes

Previous release can be found at [v2.3.2](https://github.com/containerd/containerd/releases/tag/v2.3.2)
### Which file should I download?
* `containerd-<VERSION>-<OS>-<ARCH>.tar.gz`:         ✅Recommended. Dynamically linked with glibc 2.35 (Ubuntu 22.04).
* `containerd-static-<VERSION>-<OS>-<ARCH>.tar.gz`:  Statically linked. Expected to be used on Linux distributions that do not use glibc >= 2.35. Not position-independent.

In addition to containerd, typically you will have to install [runc](https://github.com/opencontainers/runc/releases)
and [CNI plugins](https://github.com/containernetworking/plugins/releases) from their official sites too.

See also the [Getting Started](https://github.com/containerd/containerd/blob/main/docs/getting-started.md) documentation.

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