diff --git a/third_party/libtiff/0021-fix-leaks-ojpegreaderinfosectables.patch b/third_party/libtiff/0021-fix-leaks-ojpegreaderinfosectables.patch
new file mode 100644
index 0000000..13aef44
--- /dev/null
+++ b/third_party/libtiff/0021-fix-leaks-ojpegreaderinfosectables.patch
@@ -0,0 +1,31 @@
+diff --git a/third_party/libtiff/tif_ojpeg.c b/third_party/libtiff/tif_ojpeg.c
+index f69b00148..1a700d5bc 100644
+--- a/third_party/libtiff/tif_ojpeg.c
++++ b/third_party/libtiff/tif_ojpeg.c
+@@ -1794,6 +1794,8 @@ OJPEGReadHeaderInfoSecTablesQTable(TIFF* tif)
+                                _TIFFfree(ob);
+                                return(0);
+                        }
++                       if(sp->qtable[m]!=0)
++                               _TIFFfree(sp->qtable[m]);
+                        sp->qtable[m]=ob;
+                        sp->sof_tq[m]=m;
+                }
+@@ -1861,6 +1863,8 @@ OJPEGReadHeaderInfoSecTablesDcTable(TIFF* tif)
+                                _TIFFfree(rb);
+                                return(0);
+                        }
++                       if(sp->dctable[m]!=0)
++                               _TIFFfree(sp->dctable[m]);
+                        sp->dctable[m]=rb;
+                        sp->sos_tda[m]=(m<<4);
+                }
+@@ -1928,6 +1932,8 @@ OJPEGReadHeaderInfoSecTablesAcTable(TIFF* tif)
+                                _TIFFfree(rb);
+                                return(0);
+                        }
++                       if(sp->actable[m])
++                               _TIFFfree(sp->actable[m]);
+                        sp->actable[m]=rb;
+                        sp->sos_tda[m]=(sp->sos_tda[m]|m);
+                }
diff --git a/third_party/libtiff/README.pdfium b/third_party/libtiff/README.pdfium
index 219b3a7..e4436d2 100644
--- a/third_party/libtiff/README.pdfium
+++ b/third_party/libtiff/README.pdfium
@@ -30,3 +30,4 @@
 0018-fix-leak-in-PredictorSetupDecode.patch: call tif->tif_cleanup if the setup fails.
 0019-fix-invalid-reads-TIFFFetchNormalTag.patch: upstream security fix in tif_dirread.
 0020-unreasonable-td-bitspersample.patch: upstream patch ignoring large td_bitspersample.
+0021-fix-leaks-ojpegreaderinfosectables.patch: more direct leak fixes in tif_ojpeg.c.
diff --git a/third_party/libtiff/tif_ojpeg.c b/third_party/libtiff/tif_ojpeg.c
index f69b001..1a700d5 100644
--- a/third_party/libtiff/tif_ojpeg.c
+++ b/third_party/libtiff/tif_ojpeg.c
@@ -1794,6 +1794,8 @@
 				_TIFFfree(ob);
 				return(0);
 			}
+			if(sp->qtable[m]!=0)
+				_TIFFfree(sp->qtable[m]);
 			sp->qtable[m]=ob;
 			sp->sof_tq[m]=m;
 		}
@@ -1861,6 +1863,8 @@
 				_TIFFfree(rb);
 				return(0);
 			}
+			if(sp->dctable[m]!=0)
+				_TIFFfree(sp->dctable[m]);
 			sp->dctable[m]=rb;
 			sp->sos_tda[m]=(m<<4);
 		}
@@ -1928,6 +1932,8 @@
 				_TIFFfree(rb);
 				return(0);
 			}
+			if(sp->actable[m])
+				_TIFFfree(sp->actable[m]);
 			sp->actable[m]=rb;
 			sp->sos_tda[m]=(sp->sos_tda[m]|m);
 		}