Backport security fix for CVE-2026-22693 (fix RHBZ#2429278)

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;
+   }

harfbuzz.spec

@@ -1,12 +1,22 @@
 Name:           harfbuzz
 Version:        10.4.0
-Release:        1%{?dist}
+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
@@ -111,6 +121,9 @@ This package contains Harfbuzz Cairo support library.
 %{_libdir}/libharfbuzz-cairo.so.*
 
 %changelog
+* Wed Jan 14 2026 Parag Nemade <pnemade AT redhat DOT com> - 10.4.0-2
+- Backport security fix for CVE-2026-22693 (fix RHBZ#2429278)
+
 * Sat Mar 01 2025 Parag Nemade <pnemade AT redhat DOT com> - 10.4.0-1
 - Update to 10.4.0 version (#2349122)