This is the fifth backport release in the Squid series.
We recommend all users update to this release.

## Notable Changes

MDS (Metadata Server)
---------------------

- Fixed a segmentation fault relating to MDSContext completion and request
queuing.

OSD (Object Storage Daemon)
---------------------------

- Rollback & Vector Fixes: Corrected rollback logic for partial write
object information (OI) and optimized Erasure Coding (EC) by ensuring
Twiddle creates a full-sized vector.

RGW (RADOS Gateway)
-------------------

- TLS 1.3 Ciphersuites: Introduced the ssl_ciphersuites configuration
option for the Beast front-end to support TLS 1.3 cipher customizations.
- S3 PutObject ACLs Fix: Fixed a bug where PutObject requests were
erroneously rejected under BlockPublicAcls due to an incorrect comparison
return value from canned_acl.compare().
- Multisite Sync Robustness: Resolved an infinite loop scenario in
RGWBucketFullSyncCR when a source bucket was deleted mid-sync by
introducing a mechanism to clear stateful data in reused bucket_list_result
objects.
- SNS Policy Evaluation: Updated ListTopics to use the account root ARN for
policy evaluation when invoked by a non-root account user, preventing
unexpected implicit denies from identity-based policies.
- Presigned URLs: Fixed an internal server error occurring during the
authentication process of presigned URLs.
- Prerequest Hook: Restructured the order of execution so that the
prerequest hook now runs after the authorization process has completed.
- Object Tagging: Added handling for plain-text object tags during
execution of RGWObjTags::decode().
- Beast Frontend Stability: Applied a strand executor to the Beast timeout
timer to avoid concurrent socket access and potential race conditions.
- Bucket Statistics: Added a fix for bucket stats execution when the
underlying bucket index does not exist.

We recommend users to update to this release.
For detailed release notes with links & changelog please refer to the
official blog entry at
https://ceph.io/en/news/blog/2026/v19-2-5-squid-released/

Getting Ceph
------------
* Git at git://github.com/ceph/ceph.git
* Tarball at https://download.ceph.com/tarballs/ceph-19.2.5.tar.gz
* Containers at https://quay.io/repository/ceph/ceph
* For packages, see https://docs.ceph.com/en/latest/install/get-packages/
* Release git sha1: abc7aa7f2701e5d46878fd5e6bb7e2955f1a395a
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