diff --git a/CVE-2023-44488-libvpx.patch b/CVE-2023-44488-libvpx.patch
new file mode 100644
index 0000000..79e5235
--- /dev/null
+++ b/CVE-2023-44488-libvpx.patch
@@ -0,0 +1,127 @@
+From 263682c9a29395055f3b3afe2d97be1828a6223f Mon Sep 17 00:00:00 2001
+From: Jerome Jiang <jianj@google.com>
+Date: Thu, 30 Jun 2022 13:48:56 -0400
+Subject: [PATCH] Fix bug with smaller width bigger size
+
+Fixed previous patch that clusterfuzz failed on.
+
+Bug: webm:1642
+Change-Id: If0e08e72abd2e042efe4dcfac21e4cc51afdfdb9
+---
+ test/resize_test.cc          | 11 +++--------
+ vp9/common/vp9_alloccommon.c | 13 ++++++-------
+ vp9/encoder/vp9_encoder.c    | 27 +++++++++++++++++++++++++--
+ 3 files changed, 34 insertions(+), 17 deletions(-)
+
+diff --git a/test/resize_test.cc b/test/resize_test.cc
+index fd1c2a92de6..20ad2229b46 100644
+--- a/test/resize_test.cc
++++ b/test/resize_test.cc
+@@ -102,11 +102,8 @@ void ScaleForFrameNumber(unsigned int frame, unsigned int initial_w,
+     if (frame < 30) {
+       return;
+     }
+-    if (frame < 100) {
+-      *w = initial_w * 7 / 10;
+-      *h = initial_h * 16 / 10;
+-      return;
+-    }
++    *w = initial_w * 7 / 10;
++    *h = initial_h * 16 / 10;
+     return;
+   }
+   if (frame < 10) {
+@@ -559,9 +556,7 @@ TEST_P(ResizeRealtimeTest, TestExternalResizeWorks) {
+   }
+ }
+ 
+-// TODO(https://crbug.com/webm/1642): This causes a segfault in
+-// init_encode_frame_mb_context().
+-TEST_P(ResizeRealtimeTest, DISABLED_TestExternalResizeSmallerWidthBiggerSize) {
++TEST_P(ResizeRealtimeTest, TestExternalResizeSmallerWidthBiggerSize) {
+   ResizingVideoSource video;
+   video.flag_codec_ = true;
+   video.smaller_width_larger_size_ = true;
+diff --git a/vp9/common/vp9_alloccommon.c b/vp9/common/vp9_alloccommon.c
+index e53883f621d..9e73e40ea09 100644
+--- a/vp9/common/vp9_alloccommon.c
++++ b/vp9/common/vp9_alloccommon.c
+@@ -135,13 +135,6 @@ int vp9_alloc_context_buffers(VP9_COMMON *cm, int width, int height) {
+     cm->free_mi(cm);
+     if (cm->alloc_mi(cm, new_mi_size)) goto fail;
+   }
+-
+-  if (cm->seg_map_alloc_size < cm->mi_rows * cm->mi_cols) {
+-    // Create the segmentation map structure and set to 0.
+-    free_seg_map(cm);
+-    if (alloc_seg_map(cm, cm->mi_rows * cm->mi_cols)) goto fail;
+-  }
+-
+   if (cm->above_context_alloc_cols < cm->mi_cols) {
+     vpx_free(cm->above_context);
+     cm->above_context = (ENTROPY_CONTEXT *)vpx_calloc(
+@@ -156,6 +149,12 @@ int vp9_alloc_context_buffers(VP9_COMMON *cm, int width, int height) {
+     cm->above_context_alloc_cols = cm->mi_cols;
+   }
+ 
++  if (cm->seg_map_alloc_size < cm->mi_rows * cm->mi_cols) {
++    // Create the segmentation map structure and set to 0.
++    free_seg_map(cm);
++    if (alloc_seg_map(cm, cm->mi_rows * cm->mi_cols)) goto fail;
++  }
++
+   if (vp9_alloc_loop_filter(cm)) goto fail;
+ 
+   return 0;
+diff --git a/vp9/encoder/vp9_encoder.c b/vp9/encoder/vp9_encoder.c
+index 69a4e3c314f..e3ba294c32f 100644
+--- a/vp9/encoder/vp9_encoder.c
++++ b/vp9/encoder/vp9_encoder.c
+@@ -2047,6 +2047,17 @@ static void alloc_copy_partition_data(VP9_COMP *cpi) {
+   }
+ }
+ 
++static void free_copy_partition_data(VP9_COMP *cpi) {
++  vpx_free(cpi->prev_partition);
++  cpi->prev_partition = NULL;
++  vpx_free(cpi->prev_segment_id);
++  cpi->prev_segment_id = NULL;
++  vpx_free(cpi->prev_variance_low);
++  cpi->prev_variance_low = NULL;
++  vpx_free(cpi->copied_frame_cnt);
++  cpi->copied_frame_cnt = NULL;
++}
++
+ void vp9_change_config(struct VP9_COMP *cpi, const VP9EncoderConfig *oxcf) {
+   VP9_COMMON *const cm = &cpi->common;
+   RATE_CONTROL *const rc = &cpi->rc;
+@@ -2126,6 +2137,8 @@ void vp9_change_config(struct VP9_COMP *cpi, const VP9EncoderConfig *oxcf) {
+     new_mi_size = cm->mi_stride * calc_mi_size(cm->mi_rows);
+     if (cm->mi_alloc_size < new_mi_size) {
+       vp9_free_context_buffers(cm);
++      vp9_free_pc_tree(&cpi->td);
++      vpx_free(cpi->mbmi_ext_base);
+       alloc_compressor_data(cpi);
+       realloc_segmentation_maps(cpi);
+       cpi->initial_width = cpi->initial_height = 0;
+@@ -2144,8 +2157,18 @@ void vp9_change_config(struct VP9_COMP *cpi, const VP9EncoderConfig *oxcf) {
+     update_frame_size(cpi);
+ 
+   if (last_w != cpi->oxcf.width || last_h != cpi->oxcf.height) {
+-    memset(cpi->consec_zero_mv, 0,
+-           cm->mi_rows * cm->mi_cols * sizeof(*cpi->consec_zero_mv));
++    vpx_free(cpi->consec_zero_mv);
++    CHECK_MEM_ERROR(
++        &cm->error, cpi->consec_zero_mv,
++        vpx_calloc(cm->mi_rows * cm->mi_cols, sizeof(*cpi->consec_zero_mv)));
++
++    vpx_free(cpi->skin_map);
++    CHECK_MEM_ERROR(
++        &cm->error, cpi->skin_map,
++        vpx_calloc(cm->mi_rows * cm->mi_cols, sizeof(cpi->skin_map[0])));
++
++    free_copy_partition_data(cpi);
++    alloc_copy_partition_data(cpi);
+     if (cpi->oxcf.aq_mode == CYCLIC_REFRESH_AQ)
+       vp9_cyclic_refresh_reset_resize(cpi);
+     rc->rc_1_frame = 0;
diff --git a/firefox.spec b/firefox.spec
index ae78fb8..882b312 100644
--- a/firefox.spec
+++ b/firefox.spec
@@ -230,6 +230,9 @@ Patch155:       rhbz-1354671.patch
 # GENDIFF_DIFF_ARGS=-U0 gendiff firefox-xxxx .firefox-tests-reftest
 Patch201:       firefox-tests-xpcshell-freeze.patch
 
+# ---- Security patches ----
+Patch301:       CVE-2023-44488-libvpx.patch
+
 # BUILD REQURES/REQUIRES
 %if %{?system_nss} && !0%{?bundle_nss}
 BuildRequires:  pkgconfig(nspr) >= %{nspr_version}
@@ -1035,6 +1038,11 @@ echo "--------------------------------------------"
 # ---- Test patches ----
 %patch -P201 -p1 -b .firefox-tests-xpcshell-freeze
 
+# ---- Security patches ----
+cd media/libvpx/libvpx
+%patch -P301 -p1 -b .CVE-2023-44488-libvpx
+cd -
+
 %{__rm} -f .mozconfig
 %{__cp} %{SOURCE10} .mozconfig
 %{__cp} %{SOURCE24} mozilla-api-key