Index: media/libnestegg/moz.yaml
===================================================================
--- media/libnestegg/moz.yaml
+++ media/libnestegg/moz.yaml
@@ -7,12 +7,12 @@
 origin:
   name: nestegg
   description: "WebM demuxer"
   url: https://github.com/mozilla/nestegg
   license: ISC
-  release: 405fdae0802b9d6aa0c7937dbc660da197164980 (2026-04-23T08:20:19+12:00).
-  revision: 405fdae0802b9d6aa0c7937dbc660da197164980
+  release: 1c9936b171b7e37efce87f7af247c7af0e3ea5b8 (2026-06-11T21:07:37Z).
+  revision: 1c9936b171b7e37efce87f7af247c7af0e3ea5b8
 
 vendoring:
   url: https://github.com/mozilla/nestegg
   source-hosting: github
   vendor-directory: media/libnestegg
Index: media/libnestegg/src/nestegg.c
===================================================================
--- media/libnestegg/src/nestegg.c
+++ media/libnestegg/src/nestegg.c
@@ -1024,17 +1024,15 @@
 ne_read_uint(ne_io * io, uint64_t * val, uint64_t length)
 {
   unsigned char b;
   int r;
 
-  if (length == 0 || length > 8)
+  if (length > 8)
     return -1;
-  r = ne_io_read(io, &b, 1);
-  if (r != 1)
-    return r;
-  *val = b;
-  while (--length) {
+
+  *val = 0;
+  while (length--) {
     r = ne_io_read(io, &b, 1);
     if (r != 1)
       return r;
     *val <<= 8;
     *val |= b;
@@ -1050,10 +1048,15 @@
 
   r = ne_read_uint(io, &uval, length);
   if (r != 1)
     return r;
 
+  if (length == 0) {
+    *val = 0;
+    return 1;
+  }
+
   if (length < sizeof(int64_t)) {
     base = 1;
     base <<= length * 8 - 1;
     if (uval >= base) {
       base = 1;
@@ -1085,17 +1088,18 @@
     } f;
     double d;
   } value;
   int r;
 
-  /* Length == 10 not implemented. */
-  if (length != 4 && length != 8)
+  if (length != 0 && length != 4 && length != 8)
     return -1;
   r = ne_read_uint(io, &value.u, length);
   if (r != 1)
     return r;
-  if (length == 4)
+  if (length == 0)
+    *val = 0.;
+  else if (length == 4)
     *val = value.f.f;
   else
     *val = value.d;
   return 1;
 }