new file mode 100644
@@ -0,0 +1,88 @@
+From 4003a6635c9a429de3f64ce967e8322ecbc6e71a Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Bern=C3=A1t=20G=C3=A1bor?= <gaborjbernat@gmail.com>
+Date: Mon, 15 Dec 2025 15:52:12 -0800
+Subject: [PATCH] Fix TOCTOU symlink vulnerability in lock file creation (#461)
+
+CVE: CVE-2025-68146
+Upstream-Status: Backport [https://github.com/tox-dev/filelock/commit/4724d7f8c3393ec1f048c93933e6e3e6ec321f0e]
+
+(cherry picked from commit 4724d7f8c3393ec1f048c93933e6e3e6ec321f0e)
+Signed-off-by: Darsh Kelaiya <dkelaiya@cisco.com>
+---
+ src/filelock/_unix.py | 2 +-
+ src/filelock/_windows.py | 38 ++++++++++++++++++++++++++++++++++++++
+ 2 files changed, 39 insertions(+), 1 deletion(-)
+
+diff --git a/src/filelock/_unix.py b/src/filelock/_unix.py
+index 4ae1fbe..28d3673 100644
+--- a/src/filelock/_unix.py
++++ b/src/filelock/_unix.py
+@@ -36,7 +36,7 @@ else: # pragma: win32 no cover
+
+ def _acquire(self) -> None:
+ ensure_directory_exists(self.lock_file)
+- open_flags = os.O_RDWR | os.O_TRUNC
++ open_flags = os.O_RDWR | os.O_TRUNC | os.O_NOFOLLOW
+ if not Path(self.lock_file).exists():
+ open_flags |= os.O_CREAT
+ fd = os.open(self.lock_file, open_flags, self._context.mode)
+diff --git a/src/filelock/_windows.py b/src/filelock/_windows.py
+index 8db55dc..fe3d45c 100644
+--- a/src/filelock/_windows.py
++++ b/src/filelock/_windows.py
+@@ -11,7 +11,38 @@ from ._api import BaseFileLock
+ from ._util import ensure_directory_exists, raise_on_not_writable_file
+
+ if sys.platform == "win32": # pragma: win32 cover
++ import ctypes
+ import msvcrt
++ from ctypes import wintypes
++
++ # Windows API constants for reparse point detection
++ FILE_ATTRIBUTE_REPARSE_POINT = 0x00000400
++ INVALID_FILE_ATTRIBUTES = 0xFFFFFFFF
++
++ # Load kernel32.dll
++ _kernel32 = ctypes.WinDLL("kernel32", use_last_error=True)
++ _kernel32.GetFileAttributesW.argtypes = [wintypes.LPCWSTR]
++ _kernel32.GetFileAttributesW.restype = wintypes.DWORD
++
++ def _is_reparse_point(path: str) -> bool:
++ """
++ Check if a path is a reparse point (symlink, junction, etc.) on Windows.
++
++ :param path: Path to check
++ :return: True if path is a reparse point, False otherwise
++ :raises OSError: If GetFileAttributesW fails for reasons other than file-not-found
++ """
++ attrs = _kernel32.GetFileAttributesW(path)
++ if attrs == INVALID_FILE_ATTRIBUTES:
++ # File doesn't exist yet - that's fine, we'll create it
++ err = ctypes.get_last_error()
++ if err == 2: # noqa: PLR2004 # ERROR_FILE_NOT_FOUND
++ return False
++ if err == 3: # noqa: PLR2004 # ERROR_PATH_NOT_FOUND
++ return False
++ # Some other error - let caller handle it
++ return False
++ return bool(attrs & FILE_ATTRIBUTE_REPARSE_POINT)
+
+ class WindowsFileLock(BaseFileLock):
+ """Uses the :func:`msvcrt.locking` function to hard lock the lock file on Windows systems."""
+@@ -19,6 +50,13 @@ if sys.platform == "win32": # pragma: win32 cover
+ def _acquire(self) -> None:
+ raise_on_not_writable_file(self.lock_file)
+ ensure_directory_exists(self.lock_file)
++
++ # Security check: Refuse to open reparse points (symlinks, junctions)
++ # This prevents TOCTOU symlink attacks (CVE-TBD)
++ if _is_reparse_point(self.lock_file):
++ msg = f"Lock file is a reparse point (symlink/junction): {self.lock_file}"
++ raise OSError(msg)
++
+ flags = (
+ os.O_RDWR # open for read and write
+ | os.O_CREAT # create file if not exists
+--
+2.44.4
+
@@ -8,6 +8,9 @@ LIC_FILES_CHKSUM = "file://LICENSE;md5=911690f51af322440237a253d695d19f"
SRC_URI[sha256sum] = "d13f466618bfde72bd2c18255e269f72542c6e70e7bac83a0232d6b1cc5c8cf4"
+SRC_URI += "file://CVE-2025-68146.patch \
+ "
+
BBCLASSEXTEND = "native nativesdk"
inherit pypi python_hatchling