Symfony 4.4.27 has just been released. Here is a list of the most
important changes:

bug #42212 [Lock] Handle lock with long key (@jderusse)
bug #42223 [Debug][ErrorHandler] Do not use the php80 polyfill (@nicolas-grekas)
bug #42207 [Console] fix table setHeaderTitle without headers (@a1812)
bug #42130 [Translation] fix fallback to Locale::getDefault() (@nicolas-grekas)
bug #42184 [Mailer] Make sure Http TransportException is not leaking (@Nyholm)
bug #42150 [Form] Fix ‘invali _message’ use in multiple ChoiceType (@alexandre-daubois)
bug #42174 Indicate compatibility with psr/log 2 and 3 (@derrabus)
bug #42112 [HttpFoundation] fix FileBag under PHP 8.1 (@alexpott)
bug #42131 [PhpUnitBridge] Fix composer resolution on Windows (@Rainrider)
bug #42097 [DependencyInjection] Support for intersection types (@derrabus)
bug #42114 [HttpFoundation] Fix return types of SessionHandler::gc() (@derrabus)
bug #42099 [VarDumper] Support for intersection types (@derrabus)
bug #42011 [Cache] Support decorated Dbal drivers in PdoAdapter (@Jeroeny)
bug #42068 Add a Special Case for Translating Choices in e _U _POSIX (@chrisguitarguy)
bug #42074 Fix ctyp _digit deprecation (@alexpott)
bug #42084 [WebProfilerBundle] Fix the values of some CSS properties (@javiereguiluz)
bug #42079 [FrameworkBundle] Fixed file operations in Sodium vault seal (@javiereguiluz)
bug #42054 [DoctrineBridge] fix setting default mapping type to attribute/annotation on php 8/7 respectively (@nicolas-grekas)
bug #42049 [TwigBridge] do not render the same label id attribute twice (@xabbuh)
bug #42032 [HttpKernel] recover from failed deserializations (@xabbuh)
bug #41990 [Lock] fix derivating semaphore from key (@nicolas-grekas)
bug #40529 [Translation] Missing translations from traits (@insekticid)
bug #41384 Fix SkippedTestSuite (@jderusse)
bug #41966 [Console] Revert “bug #41952 fix handling positional arguments” (@chalasr, @nicolas-grekas)
bug #41905 [EventDispatcher] Correct the called event listener method case (@JJsty1e)
bug #41952 [Console] fix handling positional arguments (@nicolas-grekas)
bug #41887 [PhpUnitBridge] Fix deprecation handler with PHPUnit 10 (@YaFou)

Want to upgrade to this new release? Because Symfony protects
backwards-compatibility very closely, this should be quite easy. Use
SymfonyInsight upgrade reports
to detect the code you will need to change in your project and
read our upgrade
documentation to learn more.

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