diff --git a/stdlib/@tests/stubtest_allowlists/darwin-py314.txt b/stdlib/@tests/stubtest_allowlists/darwin-py314.txt
index 31c60195d..128e49ac2 100644
--- a/stdlib/@tests/stubtest_allowlists/darwin-py314.txt
+++ b/stdlib/@tests/stubtest_allowlists/darwin-py314.txt
@@ -13,7 +13,6 @@ ctypes.c_float_complex._type_
 ctypes.c_longdouble_complex._type_
 multiprocessing.popen_fork.Popen.interrupt
 multiprocessing.reduction.ACKNOWLEDGE
-posix.readinto
 
 
 # =======
diff --git a/stdlib/@tests/stubtest_allowlists/linux-py314.txt b/stdlib/@tests/stubtest_allowlists/linux-py314.txt
index c6e1bc3bd..091e7257d 100644
--- a/stdlib/@tests/stubtest_allowlists/linux-py314.txt
+++ b/stdlib/@tests/stubtest_allowlists/linux-py314.txt
@@ -21,11 +21,6 @@ ctypes.c_longdouble_complex._type_
 errno.EHWPOISON
 multiprocessing.popen_fork.Popen.interrupt
 multiprocessing.reduction.ACKNOWLEDGE
-os.SCHED_DEADLINE
-os.SCHED_NORMAL
-posix.SCHED_DEADLINE
-posix.SCHED_NORMAL
-posix.readinto
 select.EPOLLWAKEUP
 socket.CAN_RAW_ERR_FILTER
 socket.IPV6_RECVERR
diff --git a/stdlib/@tests/stubtest_allowlists/py314.txt b/stdlib/@tests/stubtest_allowlists/py314.txt
index eac9334bc..5115fe7a8 100644
--- a/stdlib/@tests/stubtest_allowlists/py314.txt
+++ b/stdlib/@tests/stubtest_allowlists/py314.txt
@@ -90,8 +90,6 @@ multiprocessing.managers._BaseDictProxy.__ror__
 multiprocessing.managers._BaseDictProxy.fromkeys
 multiprocessing.process.BaseProcess.interrupt
 multiprocessing.synchronize.SemLock.locked
-os.__all__
-os.readinto
 pkgutil.__all__
 pkgutil.find_loader
 pkgutil.get_loader
diff --git a/stdlib/os/__init__.pyi b/stdlib/os/__init__.pyi
index d0ef614ab..5286c76d1 100644
--- a/stdlib/os/__init__.pyi
+++ b/stdlib/os/__init__.pyi
@@ -160,6 +160,8 @@ __all__ = [
     "walk",
     "write",
 ]
+if sys.version_info >= (3, 14):
+    __all__ += ["readinto"]
 if sys.platform == "darwin" and sys.version_info >= (3, 12):
     __all__ += ["PRIO_DARWIN_BG", "PRIO_DARWIN_NONUI", "PRIO_DARWIN_PROCESS", "PRIO_DARWIN_THREAD"]
 if sys.platform == "darwin" and sys.version_info >= (3, 10):
@@ -208,6 +210,8 @@ if sys.platform == "linux":
         "removexattr",
         "setxattr",
     ]
+if sys.platform == "linux" and sys.version_info >= (3, 14):
+    __all__ += ["SCHED_DEADLINE", "SCHED_NORMAL"]
 if sys.platform == "linux" and sys.version_info >= (3, 13):
     __all__ += [
         "POSIX_SPAWN_CLOSEFROM",
@@ -570,6 +574,10 @@ if sys.platform == "linux":
     SCHED_IDLE: int
     SCHED_RESET_ON_FORK: int
 
+if sys.version_info >= (3, 14) and sys.platform == "linux":
+    SCHED_DEADLINE: int
+    SCHED_NORMAL: int
+
 if sys.platform != "win32":
     RTLD_LAZY: int
     RTLD_NOW: int
@@ -1149,6 +1157,9 @@ if sys.platform != "win32":
     def readv(fd: int, buffers: SupportsLenAndGetItem[WriteableBuffer], /) -> int: ...
     def writev(fd: int, buffers: SupportsLenAndGetItem[ReadableBuffer], /) -> int: ...
 
+if sys.version_info >= (3, 14):
+    def readinto(fd: int, buffer: ReadableBuffer, /) -> int: ...
+
 @final
 class terminal_size(structseq[int], tuple[int, int]):
     if sys.version_info >= (3, 10):
diff --git a/stdlib/posix.pyi b/stdlib/posix.pyi
index 88f4135af..6d0d76ab8 100644
--- a/stdlib/posix.pyi
+++ b/stdlib/posix.pyi
@@ -250,6 +250,12 @@ if sys.platform != "win32":
             timerfd_settime_ns as timerfd_settime_ns,
         )
 
+    if sys.version_info >= (3, 14):
+        from os import readinto as readinto
+
+    if sys.version_info >= (3, 14) and sys.platform == "linux":
+        from os import SCHED_DEADLINE as SCHED_DEADLINE, SCHED_NORMAL as SCHED_NORMAL
+
     if sys.platform != "linux":
         from os import O_EXLOCK as O_EXLOCK, O_SHLOCK as O_SHLOCK, chflags as chflags, lchflags as lchflags, lchmod as lchmod