diff -Nru nginx-1.18.0/debian/changelog nginx-1.18.0/debian/changelog
--- nginx-1.18.0/debian/changelog	2022-04-12 08:04:16.000000000 +0000
+++ nginx-1.18.0/debian/changelog	2022-11-10 06:38:48.000000000 +0000
@@ -1,3 +1,13 @@
+nginx (1.18.0-0ubuntu1.4) focal-security; urgency=medium
+
+  * SECURITY UPDATE: memory corruption/disclosure issue
+    - debian/patches/CVE-2022-41741_41742.patch: disabled duplicate atoms in
+      Mp4
+    - CVE-2022-41741
+    - CVE-2022-41742
+
+ -- Nishit Majithia <nishit.majithia@canonical.com>  Thu, 10 Nov 2022 12:08:48 +0530
+
 nginx (1.18.0-0ubuntu1.3) focal-security; urgency=medium
 
   * SECURITY UPDATE: ALPACA TLS issue
diff -Nru nginx-1.18.0/debian/patches/CVE-2022-41741_41742.patch nginx-1.18.0/debian/patches/CVE-2022-41741_41742.patch
--- nginx-1.18.0/debian/patches/CVE-2022-41741_41742.patch	1970-01-01 00:00:00.000000000 +0000
+++ nginx-1.18.0/debian/patches/CVE-2022-41741_41742.patch	2022-11-10 06:19:54.000000000 +0000
@@ -0,0 +1,308 @@
+From 0d23105373e6d8a720b9826079c077b9b4be919d Mon Sep 17 00:00:00 2001
+From: Roman Arutyunyan <arut@nginx.com>
+Date: Wed, 19 Oct 2022 10:53:17 +0300
+Subject: [PATCH] Mp4: disabled duplicate atoms.
+
+Most atoms should not appear more than once in a container.  Previously,
+this was not enforced by the module, which could result in worker process
+crash, memory corruption and disclosure.
+---
+ src/http/modules/ngx_http_mp4_module.c | 147 +++++++++++++++++++++++++
+ 1 file changed, 147 insertions(+)
+
+--- nginx-1.18.0.orig/src/http/modules/ngx_http_mp4_module.c
++++ nginx-1.18.0/src/http/modules/ngx_http_mp4_module.c
+@@ -1076,6 +1076,12 @@ ngx_http_mp4_read_ftyp_atom(ngx_http_mp4
+         return NGX_ERROR;
+     }
+ 
++    if (mp4->ftyp_atom.buf) {
++        ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
++                      "duplicate mp4 ftyp atom in \"%s\"", mp4->file.name.data);
++        return NGX_ERROR;
++    }
++
+     atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size;
+ 
+     ftyp_atom = ngx_palloc(mp4->request->pool, atom_size);
+@@ -1134,6 +1140,12 @@ ngx_http_mp4_read_moov_atom(ngx_http_mp4
+         return NGX_DECLINED;
+     }
+ 
++    if (mp4->moov_atom.buf) {
++        ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
++                      "duplicate mp4 moov atom in \"%s\"", mp4->file.name.data);
++        return NGX_ERROR;
++    }
++
+     conf = ngx_http_get_module_loc_conf(mp4->request, ngx_http_mp4_module);
+ 
+     if (atom_data_size > mp4->buffer_size) {
+@@ -1201,6 +1213,12 @@ ngx_http_mp4_read_mdat_atom(ngx_http_mp4
+ 
+     ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 mdat atom");
+ 
++    if (mp4->mdat_atom.buf) {
++        ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
++                      "duplicate mp4 mdat atom in \"%s\"", mp4->file.name.data);
++        return NGX_ERROR;
++    }
++
+     data = &mp4->mdat_data_buf;
+     data->file = &mp4->file;
+     data->in_file = 1;
+@@ -1327,6 +1345,12 @@ ngx_http_mp4_read_mvhd_atom(ngx_http_mp4
+ 
+     ngx_log_debug0(NGX_LOG_DEBUG_HTTP, mp4->file.log, 0, "mp4 mvhd atom");
+ 
++    if (mp4->mvhd_atom.buf) {
++        ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
++                      "duplicate mp4 mvhd atom in \"%s\"", mp4->file.name.data);
++        return NGX_ERROR;
++    }
++
+     atom_header = ngx_mp4_atom_header(mp4);
+     mvhd_atom = (ngx_mp4_mvhd_atom_t *) atom_header;
+     mvhd64_atom = (ngx_mp4_mvhd64_atom_t *) atom_header;
+@@ -1592,6 +1616,13 @@ ngx_http_mp4_read_tkhd_atom(ngx_http_mp4
+     atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size;
+ 
+     trak = ngx_mp4_last_trak(mp4);
++
++    if (trak->out[NGX_HTTP_MP4_TKHD_ATOM].buf) {
++        ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
++                      "duplicate mp4 tkhd atom in \"%s\"", mp4->file.name.data);
++        return NGX_ERROR;
++    }
++
+     trak->tkhd_size = atom_size;
+ 
+     ngx_mp4_set_32value(tkhd_atom->size, atom_size);
+@@ -1630,6 +1661,12 @@ ngx_http_mp4_read_mdia_atom(ngx_http_mp4
+ 
+     trak = ngx_mp4_last_trak(mp4);
+ 
++    if (trak->out[NGX_HTTP_MP4_MDIA_ATOM].buf) {
++        ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
++                      "duplicate mp4 mdia atom in \"%s\"", mp4->file.name.data);
++        return NGX_ERROR;
++    }
++
+     atom = &trak->mdia_atom_buf;
+     atom->temporary = 1;
+     atom->pos = atom_header;
+@@ -1753,6 +1790,13 @@ ngx_http_mp4_read_mdhd_atom(ngx_http_mp4
+     atom_size = sizeof(ngx_mp4_atom_header_t) + (size_t) atom_data_size;
+ 
+     trak = ngx_mp4_last_trak(mp4);
++
++    if (trak->out[NGX_HTTP_MP4_MDHD_ATOM].buf) {
++        ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
++                      "duplicate mp4 mdhd atom in \"%s\"", mp4->file.name.data);
++        return NGX_ERROR;
++    }
++
+     trak->mdhd_size = atom_size;
+     trak->timescale = timescale;
+ 
+@@ -1795,6 +1839,12 @@ ngx_http_mp4_read_hdlr_atom(ngx_http_mp4
+ 
+     trak = ngx_mp4_last_trak(mp4);
+ 
++    if (trak->out[NGX_HTTP_MP4_HDLR_ATOM].buf) {
++        ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
++                      "duplicate mp4 hdlr atom in \"%s\"", mp4->file.name.data);
++        return NGX_ERROR;
++    }
++
+     atom = &trak->hdlr_atom_buf;
+     atom->temporary = 1;
+     atom->pos = atom_header;
+@@ -1823,6 +1873,12 @@ ngx_http_mp4_read_minf_atom(ngx_http_mp4
+ 
+     trak = ngx_mp4_last_trak(mp4);
+ 
++    if (trak->out[NGX_HTTP_MP4_MINF_ATOM].buf) {
++        ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
++                      "duplicate mp4 minf atom in \"%s\"", mp4->file.name.data);
++        return NGX_ERROR;
++    }
++
+     atom = &trak->minf_atom_buf;
+     atom->temporary = 1;
+     atom->pos = atom_header;
+@@ -1866,6 +1922,15 @@ ngx_http_mp4_read_vmhd_atom(ngx_http_mp4
+ 
+     trak = ngx_mp4_last_trak(mp4);
+ 
++    if (trak->out[NGX_HTTP_MP4_VMHD_ATOM].buf
++        || trak->out[NGX_HTTP_MP4_SMHD_ATOM].buf)
++    {
++        ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
++                      "duplicate mp4 vmhd/smhd atom in \"%s\"",
++                      mp4->file.name.data);
++        return NGX_ERROR;
++    }
++
+     atom = &trak->vmhd_atom_buf;
+     atom->temporary = 1;
+     atom->pos = atom_header;
+@@ -1897,6 +1962,15 @@ ngx_http_mp4_read_smhd_atom(ngx_http_mp4
+ 
+     trak = ngx_mp4_last_trak(mp4);
+ 
++    if (trak->out[NGX_HTTP_MP4_VMHD_ATOM].buf
++        || trak->out[NGX_HTTP_MP4_SMHD_ATOM].buf)
++    {
++        ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
++                      "duplicate mp4 vmhd/smhd atom in \"%s\"",
++                      mp4->file.name.data);
++        return NGX_ERROR;
++    }
++
+     atom = &trak->smhd_atom_buf;
+     atom->temporary = 1;
+     atom->pos = atom_header;
+@@ -1928,6 +2002,12 @@ ngx_http_mp4_read_dinf_atom(ngx_http_mp4
+ 
+     trak = ngx_mp4_last_trak(mp4);
+ 
++    if (trak->out[NGX_HTTP_MP4_DINF_ATOM].buf) {
++        ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
++                      "duplicate mp4 dinf atom in \"%s\"", mp4->file.name.data);
++        return NGX_ERROR;
++    }
++
+     atom = &trak->dinf_atom_buf;
+     atom->temporary = 1;
+     atom->pos = atom_header;
+@@ -1956,6 +2036,12 @@ ngx_http_mp4_read_stbl_atom(ngx_http_mp4
+ 
+     trak = ngx_mp4_last_trak(mp4);
+ 
++    if (trak->out[NGX_HTTP_MP4_STBL_ATOM].buf) {
++        ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
++                      "duplicate mp4 stbl atom in \"%s\"", mp4->file.name.data);
++        return NGX_ERROR;
++    }
++
+     atom = &trak->stbl_atom_buf;
+     atom->temporary = 1;
+     atom->pos = atom_header;
+@@ -2024,6 +2110,12 @@ ngx_http_mp4_read_stsd_atom(ngx_http_mp4
+ 
+     trak = ngx_mp4_last_trak(mp4);
+ 
++    if (trak->out[NGX_HTTP_MP4_STSD_ATOM].buf) {
++        ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
++                      "duplicate mp4 stsd atom in \"%s\"", mp4->file.name.data);
++        return NGX_ERROR;
++    }
++
+     atom = &trak->stsd_atom_buf;
+     atom->temporary = 1;
+     atom->pos = atom_header;
+@@ -2092,6 +2184,13 @@ ngx_http_mp4_read_stts_atom(ngx_http_mp4
+     atom_end = atom_table + entries * sizeof(ngx_mp4_stts_entry_t);
+ 
+     trak = ngx_mp4_last_trak(mp4);
++
++    if (trak->out[NGX_HTTP_MP4_STTS_ATOM].buf) {
++        ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
++                      "duplicate mp4 stts atom in \"%s\"", mp4->file.name.data);
++        return NGX_ERROR;
++    }
++
+     trak->time_to_sample_entries = entries;
+ 
+     atom = &trak->stts_atom_buf;
+@@ -2297,6 +2396,13 @@ ngx_http_mp4_read_stss_atom(ngx_http_mp4
+                    "sync sample entries:%uD", entries);
+ 
+     trak = ngx_mp4_last_trak(mp4);
++
++    if (trak->out[NGX_HTTP_MP4_STSS_ATOM].buf) {
++        ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
++                      "duplicate mp4 stss atom in \"%s\"", mp4->file.name.data);
++        return NGX_ERROR;
++    }
++
+     trak->sync_samples_entries = entries;
+ 
+     atom_table = atom_header + sizeof(ngx_http_mp4_stss_atom_t);
+@@ -2495,6 +2601,13 @@ ngx_http_mp4_read_ctts_atom(ngx_http_mp4
+                    "composition offset entries:%uD", entries);
+ 
+     trak = ngx_mp4_last_trak(mp4);
++
++    if (trak->out[NGX_HTTP_MP4_CTTS_ATOM].buf) {
++        ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
++                      "duplicate mp4 ctts atom in \"%s\"", mp4->file.name.data);
++        return NGX_ERROR;
++    }
++
+     trak->composition_offset_entries = entries;
+ 
+     atom_table = atom_header + sizeof(ngx_mp4_ctts_atom_t);
+@@ -2698,6 +2811,13 @@ ngx_http_mp4_read_stsc_atom(ngx_http_mp4
+     atom_end = atom_table + entries * sizeof(ngx_mp4_stsc_entry_t);
+ 
+     trak = ngx_mp4_last_trak(mp4);
++
++    if (trak->out[NGX_HTTP_MP4_STSC_ATOM].buf) {
++        ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
++                      "duplicate mp4 stsc atom in \"%s\"", mp4->file.name.data);
++        return NGX_ERROR;
++    }
++
+     trak->sample_to_chunk_entries = entries;
+ 
+     atom = &trak->stsc_atom_buf;
+@@ -3030,6 +3150,13 @@ ngx_http_mp4_read_stsz_atom(ngx_http_mp4
+                    "sample uniform size:%uD, entries:%uD", size, entries);
+ 
+     trak = ngx_mp4_last_trak(mp4);
++
++    if (trak->out[NGX_HTTP_MP4_STSZ_ATOM].buf) {
++        ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
++                      "duplicate mp4 stsz atom in \"%s\"", mp4->file.name.data);
++        return NGX_ERROR;
++    }
++
+     trak->sample_sizes_entries = entries;
+ 
+     atom_table = atom_header + sizeof(ngx_mp4_stsz_atom_t);
+@@ -3213,6 +3340,16 @@ ngx_http_mp4_read_stco_atom(ngx_http_mp4
+     atom_end = atom_table + entries * sizeof(uint32_t);
+ 
+     trak = ngx_mp4_last_trak(mp4);
++
++    if (trak->out[NGX_HTTP_MP4_STCO_ATOM].buf
++        || trak->out[NGX_HTTP_MP4_CO64_ATOM].buf)
++    {
++        ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
++                      "duplicate mp4 stco/co64 atom in \"%s\"",
++                      mp4->file.name.data);
++        return NGX_ERROR;
++    }
++
+     trak->chunks = entries;
+ 
+     atom = &trak->stco_atom_buf;
+@@ -3419,6 +3556,16 @@ ngx_http_mp4_read_co64_atom(ngx_http_mp4
+     atom_end = atom_table + entries * sizeof(uint64_t);
+ 
+     trak = ngx_mp4_last_trak(mp4);
++
++    if (trak->out[NGX_HTTP_MP4_STCO_ATOM].buf
++        || trak->out[NGX_HTTP_MP4_CO64_ATOM].buf)
++    {
++        ngx_log_error(NGX_LOG_ERR, mp4->file.log, 0,
++                      "duplicate mp4 stco/co64 atom in \"%s\"",
++                      mp4->file.name.data);
++        return NGX_ERROR;
++    }
++
+     trak->chunks = entries;
+ 
+     atom = &trak->co64_atom_buf;
diff -Nru nginx-1.18.0/debian/patches/series nginx-1.18.0/debian/patches/series
--- nginx-1.18.0/debian/patches/series	2022-04-12 08:03:34.000000000 +0000
+++ nginx-1.18.0/debian/patches/series	2022-11-10 06:19:46.000000000 +0000
@@ -5,3 +5,4 @@
 CVE-2021-23017-1.patch
 CVE-2021-23017-2.patch
 CVE-2021-3618.patch
+CVE-2022-41741_41742.patch