diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
index 0c883cd834..40b2c57fe5 100644
--- a/src/conf/domain_conf.c
+++ b/src/conf/domain_conf.c
@@ -29589,7 +29589,11 @@ virDomainDefFormatInternalSetRootName(virDomainDefPtr def,
          * Thankfully, libxml maps what looks like globals into
          * thread-local uses, so we are thread-safe.  */
         xmlIndentTreeOutput = 1;
-        xmlbuf = xmlBufferCreate();
+        if (!(xmlbuf = xmlBufferCreate())) {
+            virReportOOMError();
+            goto error;
+        }
+
         if (xmlNodeDump(xmlbuf, def->metadata->doc, def->metadata,
                         virBufferGetIndent(buf) / 2, 1) < 0) {
             xmlBufferFree(xmlbuf);
diff --git a/src/conf/network_conf.c b/src/conf/network_conf.c
index 87d43de1e3..5b578f894c 100644
--- a/src/conf/network_conf.c
+++ b/src/conf/network_conf.c
@@ -2518,7 +2518,11 @@ virNetworkDefFormatBuf(virBufferPtr buf,
          * Thankfully, libxml maps what looks like globals into
          * thread-local uses, so we are thread-safe.  */
         xmlIndentTreeOutput = 1;
-        xmlbuf = xmlBufferCreate();
+        if (!(xmlbuf = xmlBufferCreate())) {
+            virReportOOMError();
+            return -1;
+        }
+
         if (xmlNodeDump(xmlbuf, def->metadata->doc, def->metadata,
                         virBufferGetIndent(buf) / 2, 1) < 0) {
             xmlBufferFree(xmlbuf);
diff --git a/src/vmx/vmx.c b/src/vmx/vmx.c
index f2248cef53..263b57e177 100644
--- a/src/vmx/vmx.c
+++ b/src/vmx/vmx.c
@@ -697,8 +697,8 @@ virVMXConvertToUTF8(const char *encoding, const char *string)
 {
     char *result = NULL;
     xmlCharEncodingHandlerPtr handler;
-    xmlBufferPtr input;
-    xmlBufferPtr utf8;
+    xmlBufferPtr input = NULL;
+    xmlBufferPtr utf8 = NULL;
 
     handler = xmlFindCharEncodingHandler(encoding);
 
@@ -708,8 +708,11 @@ virVMXConvertToUTF8(const char *encoding, const char *string)
         return NULL;
     }
 
-    input = xmlBufferCreateStatic((char *)string, strlen(string));
-    utf8 = xmlBufferCreate();
+    if (!(input = xmlBufferCreateStatic((char *)string, strlen(string))) ||
+        !(utf8 = xmlBufferCreate())) {
+        virReportOOMError();
+        goto cleanup;
+    }
 
     if (xmlCharEncInFunc(handler, utf8, input) < 0) {
         virReportError(VIR_ERR_INTERNAL_ERROR,