Issue #18426: Fix NULL pointer dereference in C extension import when
PyModule_GetDef() returns an error.
diff --git a/Misc/NEWS b/Misc/NEWS
index 63d4969..4d55853 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -12,6 +12,9 @@
Core and Builtins
-----------------
+- Issue #18426: Fix NULL pointer dereference in C extension import when
+ PyModule_GetDef() returns an error.
+
- Issue #18328: Reorder ops in PyThreadState_Delete*() functions. Now the
tstate is first removed from TLS and then deallocated.
diff --git a/Python/importdl.c b/Python/importdl.c
index 942e4b8..e393de1 100644
--- a/Python/importdl.c
+++ b/Python/importdl.c
@@ -97,6 +97,8 @@
/* Remember pointer to module init function. */
def = PyModule_GetDef(m);
+ if (def == NULL)
+ goto error;
def->m_base.m_init = p;
/* Remember the filename as the __file__ attribute */