diff --git a/.gitignore b/.gitignore
index e13cb52..443fb4d 100644
--- a/.gitignore
+++ b/.gitignore
@@ -172,7 +172,3 @@
 /harfbuzz-11.4.5.tar.xz
 /harfbuzz-11.5.0.tar.xz
 /harfbuzz-11.5.1.tar.xz
-/harfbuzz-12.0.0.tar.xz
-/harfbuzz-12.1.0.tar.xz
-/harfbuzz-12.2.0.tar.xz
-/harfbuzz-12.3.0.tar.xz
diff --git a/1265ff8d990284f04d8768f35b0e20ae5f60daae.patch b/1265ff8d990284f04d8768f35b0e20ae5f60daae.patch
new file mode 100644
index 0000000..81a02d6
--- /dev/null
+++ b/1265ff8d990284f04d8768f35b0e20ae5f60daae.patch
@@ -0,0 +1,25 @@
+From 1265ff8d990284f04d8768f35b0e20ae5f60daae Mon Sep 17 00:00:00 2001
+From: Behdad Esfahbod <behdad@behdad.org>
+Date: Fri, 9 Jan 2026 04:54:42 -0700
+Subject: [PATCH] [cmap] malloc fail test (#5710)
+
+Fixes https://github.com/harfbuzz/harfbuzz/security/advisories/GHSA-xvjr-f2r9-c7ww
+---
+ src/hb-ot-cmap-table.hh | 4 ++++
+ 1 file changed, 4 insertions(+)
+
+diff --git a/src/hb-ot-cmap-table.hh b/src/hb-ot-cmap-table.hh
+index 32f705bb3c5..d08e66edaa2 100644
+--- a/src/hb-ot-cmap-table.hh
++++ b/src/hb-ot-cmap-table.hh
+@@ -1670,6 +1670,10 @@ struct SubtableUnicodesCache {
+   {
+     SubtableUnicodesCache* cache =
+         (SubtableUnicodesCache*) hb_malloc (sizeof(SubtableUnicodesCache));
++
++    if (unlikely (!cache))
++      return nullptr;
++
+     new (cache) SubtableUnicodesCache (source_table);
+     return cache;
+   }
diff --git a/harfbuzz.spec b/harfbuzz.spec
index 8f5f956..bb213da 100644
--- a/harfbuzz.spec
+++ b/harfbuzz.spec
@@ -1,12 +1,22 @@
 Name:           harfbuzz
-Version:        12.3.0
-Release:        1%{?dist}
+Version:        11.5.1
+Release:        2%{?dist}
 Summary:        Text shaping library
 
 License:        MIT-Modern-Variant
 URL:            https://github.com/harfbuzz/harfbuzz/
 Source0:        https://github.com/harfbuzz/harfbuzz/releases/download/%{version}/harfbuzz-%{version}.tar.xz
 
+# [cmap] malloc fail test (#5710)
+# https://github.com/harfbuzz/harfbuzz/commit/1265ff8d990284f04d8768f35b0e20ae5f60daae
+#
+# Fixes:
+#
+# Null Pointer Dereference in SubtableUnicodesCache::create leading to DoS
+# https://www.cve.org/CVERecord?id=CVE-2026-22693
+# https://github.com/harfbuzz/harfbuzz/security/advisories/GHSA-xvjr-f2r9-c7ww
+Patch:          https://github.com/harfbuzz/harfbuzz/commit/1265ff8d990284f04d8768f35b0e20ae5f60daae.patch
+
 BuildRequires:  cairo-devel
 BuildRequires:  freetype-devel
 BuildRequires:  glib2-devel
@@ -110,17 +120,8 @@ This package contains Harfbuzz Cairo support library.
 %{_libdir}/libharfbuzz-cairo.so.*
 
 %changelog
-* Sun Dec 28 2025 Parag Nemade <pnemade AT redhat DOT com> - 12.3.0-1
-- Update to 12.3.0 version (#2425647)
-
-* Fri Nov 07 2025 Parag Nemade <pnemade AT redhat DOT com> - 12.2.0-1
-- Update to 12.2.0 version (#2412425)
-
-* Thu Oct 02 2025 Parag Nemade <pnemade AT redhat DOT com> - 12.1.0-1
-- Update to 12.1.0 version (#2400640)
-
-* Sun Sep 28 2025 Parag Nemade <pnemade AT redhat DOT com> - 12.0.0-1
-- Update to 12.0.0 version (#2399955)
+* Wed Jan 14 2026 Parag Nemade <pnemade AT redhat DOT com> - 11.5.1-2
+- Backport security fix for CVE-2026-22693 (fix RHBZ#2429288)
 
 * Tue Sep 23 2025 Parag Nemade <pnemade AT redhat DOT com> - 11.5.1-1
 - Update to 11.5.1 version (#2397450)
diff --git a/sources b/sources
index 7199718..4df73bd 100644
--- a/sources
+++ b/sources
@@ -1 +1 @@
-SHA512 (harfbuzz-12.3.0.tar.xz) = 7452379ee35b312cb83b5365e480dd2cc73813fa5eb489988ea7b02fa7e8137de66ea10ef71fcbbfb3275013247c46ede3f28ac9ef92c1213424ea0b0a077b03
+SHA512 (harfbuzz-11.5.1.tar.xz) = c5525837cba6fd2d79660ffcf4069b107fa60eec21daeb89fb529c9b2a388392e92aca896c503fdd9545050ffc8e831281141fcfe816fee74b997a465ff2b528