diff --git a/poky/meta/lib/oe/cve_check.py b/poky/meta/lib/oe/cve_check.py
index a1d7c29..0302bee 100644
--- a/poky/meta/lib/oe/cve_check.py
+++ b/poky/meta/lib/oe/cve_check.py
@@ -63,3 +63,86 @@
     else:
         _pre = float(pre_v) if pre_v else float('-inf')
     return _release, _patch, _pre
+
+
+def get_patched_cves(d):
+    """
+    Get patches that solve CVEs using the "CVE: " tag.
+    """
+
+    import re
+    import oe.patch
+
+    pn = d.getVar("PN")
+    cve_match = re.compile("CVE:( CVE\-\d{4}\-\d+)+")
+
+    # Matches the last "CVE-YYYY-ID" in the file name, also if written
+    # in lowercase. Possible to have multiple CVE IDs in a single
+    # file name, but only the last one will be detected from the file name.
+    # However, patch files contents addressing multiple CVE IDs are supported
+    # (cve_match regular expression)
+
+    cve_file_name_match = re.compile(".*([Cc][Vv][Ee]\-\d{4}\-\d+)")
+
+    patched_cves = set()
+    bb.debug(2, "Looking for patches that solves CVEs for %s" % pn)
+    for url in oe.patch.src_patches(d):
+        patch_file = bb.fetch.decodeurl(url)[2]
+
+        if not os.path.isfile(patch_file):
+            bb.error("File Not found: %s" % patch_file)
+            raise FileNotFoundError
+
+        # Check patch file name for CVE ID
+        fname_match = cve_file_name_match.search(patch_file)
+        if fname_match:
+            cve = fname_match.group(1).upper()
+            patched_cves.add(cve)
+            bb.debug(2, "Found CVE %s from patch file name %s" % (cve, patch_file))
+
+        with open(patch_file, "r", encoding="utf-8") as f:
+            try:
+                patch_text = f.read()
+            except UnicodeDecodeError:
+                bb.debug(1, "Failed to read patch %s using UTF-8 encoding"
+                        " trying with iso8859-1" %  patch_file)
+                f.close()
+                with open(patch_file, "r", encoding="iso8859-1") as f:
+                    patch_text = f.read()
+
+        # Search for one or more "CVE: " lines
+        text_match = False
+        for match in cve_match.finditer(patch_text):
+            # Get only the CVEs without the "CVE: " tag
+            cves = patch_text[match.start()+5:match.end()]
+            for cve in cves.split():
+                bb.debug(2, "Patch %s solves %s" % (patch_file, cve))
+                patched_cves.add(cve)
+                text_match = True
+
+        if not fname_match and not text_match:
+            bb.debug(2, "Patch %s doesn't solve CVEs" % patch_file)
+
+    return patched_cves
+
+
+def get_cpe_ids(cve_product, version):
+    """
+    Get list of CPE identifiers for the given product and version
+    """
+
+    version = version.split("+git")[0]
+
+    cpe_ids = []
+    for product in cve_product.split():
+        # CVE_PRODUCT in recipes may include vendor information for CPE identifiers. If not,
+        # use wildcard for vendor.
+        if ":" in product:
+            vendor, product = product.split(":", 1)
+        else:
+            vendor = "*"
+
+        cpe_id = f'cpe:2.3:a:{vendor}:{product}:{version}:*:*:*:*:*:*:*'
+        cpe_ids.append(cpe_id)
+
+    return cpe_ids
diff --git a/poky/meta/lib/oe/overlayfs.py b/poky/meta/lib/oe/overlayfs.py
new file mode 100644
index 0000000..21ef710
--- /dev/null
+++ b/poky/meta/lib/oe/overlayfs.py
@@ -0,0 +1,43 @@
+#
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# This file contains common functions for overlayfs and its QA check
+
+# this function is based on https://github.com/systemd/systemd/blob/main/src/basic/unit-name.c
+def escapeSystemdUnitName(path):
+    escapeMap = {
+        '/': '-',
+        '-': "\\x2d",
+        '\\': "\\x5d"
+    }
+    return "".join([escapeMap.get(c, c) for c in path.strip('/')])
+
+def strForBash(s):
+    return s.replace('\\', '\\\\')
+
+def mountUnitName(unit):
+    return escapeSystemdUnitName(unit) + '.mount'
+
+def helperUnitName(unit):
+    return escapeSystemdUnitName(unit) + '-create-upper-dir.service'
+
+def unitFileList(d):
+    fileList = []
+    overlayMountPoints = d.getVarFlags("OVERLAYFS_MOUNT_POINT")
+
+    if not overlayMountPoints:
+        bb.fatal("A recipe uses overlayfs class but there is no OVERLAYFS_MOUNT_POINT set in your MACHINE configuration")
+
+    # check that we have required mount points set first
+    requiredMountPoints = d.getVarFlags('OVERLAYFS_WRITABLE_PATHS')
+    for mountPoint in requiredMountPoints:
+        if mountPoint not in overlayMountPoints:
+            bb.fatal("Missing required mount point for OVERLAYFS_MOUNT_POINT[%s] in your MACHINE configuration" % mountPoint)
+
+    for mountPoint in overlayMountPoints:
+        for path in d.getVarFlag('OVERLAYFS_WRITABLE_PATHS', mountPoint).split():
+            fileList.append(mountUnitName(path))
+            fileList.append(helperUnitName(path))
+
+    return fileList
+
diff --git a/poky/meta/lib/oe/packagedata.py b/poky/meta/lib/oe/packagedata.py
index 22261d2..0b17897 100644
--- a/poky/meta/lib/oe/packagedata.py
+++ b/poky/meta/lib/oe/packagedata.py
@@ -45,14 +45,14 @@
     return read_pkgdatafile(fn)
 
 #
-# Collapse FOO_pkg variables into FOO
+# Collapse FOO:pkg variables into FOO
 #
 def read_subpkgdata_dict(pkg, d):
     ret = {}
     subd = read_pkgdatafile(get_subpkgedata_fn(pkg, d))
     for var in subd:
-        newvar = var.replace("_" + pkg, "")
-        if newvar == var and var + "_" + pkg in subd:
+        newvar = var.replace(":" + pkg, "")
+        if newvar == var and var + ":" + pkg in subd:
             continue
         ret[newvar] = subd[var]
     return ret