File: '/opt/build/poky/meta/classes/cve-check.bbclass', lineno: 241, function: check_cves
     0237:        else:
     0238:            vendor = "%"
     0239:
     0240:        # Find all relevant CVE IDs.
 *** 0241:        for cverow in conn.execute("SELECT DISTINCT ID FROM PRODUCTS WHERE PRODUCT IS ? AND VENDOR LIKE ?", (product, vendor)):
     0242:            cve = cverow[0]
     0243:
     0244:            if cve in cve_whitelist:
     0245:                bb.note("%s-%s has been whitelisted for %s" % (product, pv, cve))
Exception: sqlite3.OperationalError: attempt to write a readonly database

I suspect that, as the class is executed on multiple recipe workspaces at the same time, and sqlite is know to have issues with multiple clients executions (http://www.sqlite.org/faq.html#q5) we are running into the above problem.