diff --git a/cyrus-imapd.spec b/cyrus-imapd.spec
index 822b451..931e09e 100644
--- a/cyrus-imapd.spec
+++ b/cyrus-imapd.spec
@@ -14,7 +14,7 @@
 
 Name: cyrus-imapd
 Version: 3.4.1
-Release: 10%{?dist}
+Release: 11%{?dist}
 
 
 %define ssl_pem_file_prefix /etc/pki/%name/%name
@@ -48,17 +48,25 @@ Patch1: patch-cyrus-default-configs
 # place in the source must be patched to match.
 Patch2: patch-cyrus-rename-quota
 
-
 # Workaround for some compiled Perl modules not being linked against
 # libpcreposix, which causes them to fail to load.
 # https://bugzilla.redhat.com/show_bug.cgi?id=1668723
 # https://github.com/cyrusimap/cyrus-imapd/issues/2629#issuecomment-456925909
 Patch4: patch-cyrus-perl-linking
 
-Patch5: cyrus-imapd-CVE-2021-33582.patch
-Patch6: fix-broken-delivery-to-shared-mailboxes.patch
+Patch5: patch-cyrus-CVE-2021-33582
+Patch6: patch-cyrus-fix-broken-delivery-to-shared-mailboxes
+
 # https://github.com/cyrusimap/cyrus-imapd/pull/3892
-Patch7: cyrus-imapd-squatter-assert-crash.patch
+Patch7: patch-cyrus-squatter-assert-crash
+
+# https://issues.redhat.com/browse/RHEL-20925
+# https://github.com/cyrusimap/cyrus-imapd/issues/3240
+# was fixed upstream in 3.2 by:
+# https://github.com/cyrusimap/cyrus-imapd/pull/3577
+# for 3.4 and up the below fix got used instead:
+# https://github.com/cyrusimap/cyrus-imapd/pull/4240
+Patch8: patch-cyrus-seen-unseen-flag
 
 Source10: cyrus-imapd.logrotate
 Source11: cyrus-imapd.pam-config
@@ -89,6 +97,9 @@ Source91: patch-cassandane-no-syslog
 # Upstream ticket https://github.com/cyrusimap/cyrus-imapd/issues/1995
 Source92: patch-cassandane-fix-annotator
 
+# Regression test for RHEL-20925
+# https://github.com/cyrusimap/cyrus-imapd/commit/b78c39153f96f473c1b0bbac8f8762c0ad4c64cc
+Source93: patch-cassandane-seen-unseen-flag
 
 BuildRequires: autoconf automake bison flex gcc gcc-c++ git glibc-langpack-en
 BuildRequires: groff libtool pkgconfig rsync systemd transfig
@@ -265,6 +276,7 @@ tar xf %SOURCE81
 
 patch -p1 < %SOURCE91
 patch -p1 < %SOURCE92
+patch -p1 < %SOURCE93
 
 cp %SOURCE82 cassandane.ini
 # RF rpm-buildroot-usage
@@ -671,6 +683,11 @@ exclude+=("!Master.maxforkrate")
 
 
 %changelog
+* Thu Feb 08 2024 Martin Osvald <mosvald@redhat.com> - 3.4.1-11
+- Resolves: RHEL-20925 - Seen/Unseen Flag not working correctly
+  for shared mailboxes
+- cyrus-imapd.spec: rename patches to correspond with others
+
 * Tue Aug 01 2023 Martin Osvald <mosvald@redhat.com> - 3.4.1-10
 - Resolves: #2095381 - Use systemd-sysusers for cyrus user and group
 
diff --git a/patch-cassandane-seen-unseen-flag b/patch-cassandane-seen-unseen-flag
new file mode 100644
index 0000000..f378d18
--- /dev/null
+++ b/patch-cassandane-seen-unseen-flag
@@ -0,0 +1,78 @@
+diff --git a/Cassandane/Cyrus/Flags.pm b/Cassandane/Cyrus/Flags.pm
+index a61d256..eedaf40 100644
+--- a/Cassandane/Cyrus/Flags.pm
++++ b/Cassandane/Cyrus/Flags.pm
+@@ -239,6 +239,73 @@ sub test_seen_otheruser
+     $self->check_messages(\%msg);
+ }
+ 
++# https://github.com/cyrusimap/cyrus-imapd/issues/3240
++sub test_seen_sharedmb_nosharedseen
++    :UnixHierarchySep :AltNamespace
++{
++    my ($self) = @_;
++
++    my $folder = 'shared';
++
++    # shared mailbox with sharedseen=false
++    my $admintalk = $self->{adminstore}->get_client();
++    $admintalk->create($folder);
++    $self->assert_str_equals('ok', $admintalk->get_last_completion_response());
++    $admintalk->setacl('shared', 'cassandane' => 'lrswipkxtecdan');
++    $self->assert_str_equals('ok', $admintalk->get_last_completion_response());
++    $admintalk->setmetadata($folder,
++        '/shared/vendor/cmu/cyrus-imapd/sharedseen' => 'false'
++    );
++    $self->assert_str_equals('ok', $admintalk->get_last_completion_response());
++
++
++    # add some messages
++    my $talk = $self->{store}->get_client();
++    $self->{store}->set_folder("Shared Folders/$folder");
++    $self->{store}->_select();
++    $self->assert_num_equals(1, $talk->uid());
++    $self->{store}->set_fetch_attributes(qw(uid flags));
++
++    xlog $self, "Add two messages";
++    my %msg;
++    $msg{A} = $self->make_message('Message A');
++    $msg{A}->set_attributes(id => 1,
++                            uid => 1,
++                            flags => []);
++    $msg{B} = $self->make_message('Message B');
++    $msg{B}->set_attributes(id => 2,
++                            uid => 2,
++                            flags => []);
++    $self->check_messages(\%msg);
++
++    # fiddle with seen flag, making sure we get both the expected results
++    # and the expected untagged fetch response
++    xlog $self, "Set \\Seen on message A";
++    my $res = $talk->store('1', '+flags', '(\\Seen)');
++    $self->assert_deep_equals({ '1' => { 'flags' => [ '\\Seen' ] }}, $res);
++    $msg{A}->set_attribute(flags => ['\\Seen']);
++    $self->check_messages(\%msg);
++
++    xlog $self, "Clear \\Seen on message A";
++    $res = $talk->store('1', '-flags', '(\\Seen)');
++    $self->assert_deep_equals({ '1' => { 'flags' => [] }}, $res);
++    $msg{A}->set_attribute(flags => []);
++    $self->check_messages(\%msg);
++
++    xlog $self, "Set \\Seen on message A again";
++    $res = $talk->store('1', '+flags', '(\\Seen)');
++    $self->assert_deep_equals({ '1' => { 'flags' => [ '\\Seen' ] }}, $res);
++    $msg{A}->set_attribute(flags => ['\\Seen']);
++    $self->check_messages(\%msg);
++
++    # seen flag should survive a reconnect
++    xlog $self, "Reconnect, \\Seen should still be on message A";
++    $self->{store}->disconnect();
++    $self->{store}->connect();
++    $self->{store}->_select();
++    $self->check_messages(\%msg);
++}
++
+ #
+ # Test that
+ #  - the \Flagged flag can be set
diff --git a/cyrus-imapd-CVE-2021-33582.patch b/patch-cyrus-CVE-2021-33582
similarity index 100%
rename from cyrus-imapd-CVE-2021-33582.patch
rename to patch-cyrus-CVE-2021-33582
diff --git a/fix-broken-delivery-to-shared-mailboxes.patch b/patch-cyrus-fix-broken-delivery-to-shared-mailboxes
similarity index 100%
rename from fix-broken-delivery-to-shared-mailboxes.patch
rename to patch-cyrus-fix-broken-delivery-to-shared-mailboxes
diff --git a/patch-cyrus-seen-unseen-flag b/patch-cyrus-seen-unseen-flag
new file mode 100644
index 0000000..aaff4e2
--- /dev/null
+++ b/patch-cyrus-seen-unseen-flag
@@ -0,0 +1,60 @@
+From 6dc8b483b5045a94e72e631a8faee388713c3c05 Mon Sep 17 00:00:00 2001
+From: Bron Gondwana <brong@fastmail.fm>
+Date: Wed, 21 Sep 2022 16:08:07 +1000
+Subject: [PATCH] index: track changes for modseq bump when setting seen on
+ shared folders
+
+---
+ imap/index.c | 15 +++++++++++++++
+ 1 file changed, 15 insertions(+)
+
+diff --git a/imap/index.c b/imap/index.c
+index af06e94e6..5c96216ad 100644
+--- a/imap/index.c
++++ b/imap/index.c
+@@ -4778,6 +4778,7 @@ static int index_storeflag(struct index_state *state,
+     int dirty = 0;
+     modseq_t oldmodseq;
+     struct index_map *im = &state->map[msgno-1];
++    int seen_dirty = 0;
+     int r;
+ 
+     memset(modified_flags, 0, sizeof(struct index_modified_flags));
+@@ -4803,6 +4804,7 @@ static int index_storeflag(struct index_state *state,
+             im->isseen = new;
+             state->seen_dirty = 1;
+             dirty++;
++            seen_dirty = 1;
+         }
+     }
+ 
+@@ -4925,6 +4927,7 @@ static int index_storeflag(struct index_state *state,
+         else
+             system_flags &= ~FLAG_SEEN;
+     }
++
+     /* add back the internal tracking flags */
+     system_flags |= keep;
+ 
+@@ -4942,6 +4945,18 @@ static int index_storeflag(struct index_state *state,
+     r = msgrecord_set_userflags(msgrec, user_flags);
+     if (r) return r;
+ 
++    // patch back in seen state for non-internal-seen
++    if (seen_dirty && !state->internalseen) {
++        if (im->isseen) {
++            modified_flags->added_system_flags |= FLAG_SEEN;
++            modified_flags->added_flags++;
++        }
++        else {
++            modified_flags->removed_system_flags |= FLAG_SEEN;
++            modified_flags->removed_flags++;
++        }
++    }
++
+     /* if it's silent and unchanged, update the seen value, but
+      * not if qresync is enabled - RFC 4551 says that the MODSEQ
+      * must always been told, and we prefer just to tell flags
+-- 
+2.43.0
+
diff --git a/cyrus-imapd-squatter-assert-crash.patch b/patch-cyrus-squatter-assert-crash
similarity index 100%
rename from cyrus-imapd-squatter-assert-crash.patch
rename to patch-cyrus-squatter-assert-crash