diff --git a/SOURCES/0001-CVE-2026-8357-A-formula-of-length-L-needs-L-plus-1-slots.patch b/SOURCES/0001-CVE-2026-8357-A-formula-of-length-L-needs-L-plus-1-slots.patch
new file mode 100644
index 0000000..6f12f1a
--- /dev/null
+++ b/SOURCES/0001-CVE-2026-8357-A-formula-of-length-L-needs-L-plus-1-slots.patch
@@ -0,0 +1,37 @@
+From a28cead4b7796642d946173b479281a6272117f2 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Caol=C3=A1n=20McNamara?= <caolan.mcnamara@collabora.com>
+Date: Sun, 26 Apr 2026 17:12:34 +0100
+Subject: [PATCH] A formula of length L, composed entirely of open tokens,
+ needs L+1 slots
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Signed-off-by: Caolán McNamara <caolan.mcnamara@collabora.com>
+Change-Id: I7cf1fd4fdaca780a8f0cf0d0b9d10def9b3af1ef
+Reviewed-on: https://gerrit.collaboraoffice.com/c/online/+/1690
+Tested-by: Jenkins CPCI <releng@collaboraoffice.com>
+(cherry picked from commit 0b7a9149d7c7b5e044bb4f02668297bdf41b64d6)
+Reviewed-on: https://gerrit.libreoffice.org/c/core/+/205090
+Tested-by: Jenkins
+Reviewed-by: Xisco Fauli <xiscofauli@libreoffice.org>
+---
+ sc/source/core/tool/compiler.cxx | 5 +++--
+ 1 file changed, 3 insertions(+), 2 deletions(-)
+
+diff --git a/sc/source/core/tool/compiler.cxx b/sc/source/core/tool/compiler.cxx
+index d1a6c8937ec61..f5b87efba2836 100644
+--- a/sc/source/core/tool/compiler.cxx
++++ b/sc/source/core/tool/compiler.cxx
+@@ -5058,8 +5058,9 @@ std::unique_ptr<ScTokenArray> ScCompiler::CompileString( const OUString& rFormul
+     bool bUseFunctionStack = (bPODF || bOOXML);
+     const size_t nAlloc = 512;
+     FunctionStack aFuncs[ nAlloc ];
+-    FunctionStack* pFunctionStack = (bUseFunctionStack && o3tl::make_unsigned(rFormula.getLength()) > nAlloc ?
+-         new FunctionStack[rFormula.getLength()] : &aFuncs[0]);
++    // A formula of length L composed entirely of open tokens needs L+1 slots,
++    FunctionStack* pFunctionStack = (bUseFunctionStack && o3tl::make_unsigned(rFormula.getLength()) >= nAlloc ?
++         new FunctionStack[rFormula.getLength() + 1] : &aFuncs[0]);
+     pFunctionStack[0].eOp = ocNone;
+     pFunctionStack[0].nSep = 0;
+     size_t nFunction = 0;
diff --git a/SPECS/libreoffice.spec b/SPECS/libreoffice.spec
index 087a2a0..af40c6d 100644
--- a/SPECS/libreoffice.spec
+++ b/SPECS/libreoffice.spec
@@ -62,7 +62,7 @@ Summary:        Free Software Productivity Suite
 Name:           libreoffice
 Epoch:          1
 Version:        %{libo_version}.1
-Release:        15%{?libo_prerelease}%{?dist}.1.alma.1
+Release:        15%{?libo_prerelease}%{?dist}.2.alma.1
 License:        (MPLv1.1 or LGPLv3+) and LGPLv3 and LGPLv2+ and BSD and (MPLv1.1 or GPLv2 or LGPLv2 or Netscape) and Public Domain and ASL 2.0 and MPLv2.0 and CC0
 URL:            http://www.libreoffice.org/
 
@@ -306,6 +306,8 @@ Patch45: 0001-CVE-2024-6472-remove-ability-to-trust-not-validated-macro-signatur
 Patch46: 0001-CVE-2025-1080-Filter-out-more-unwanted-command-URIs.patch
 # https://gerrit.libreoffice.org/c/core/+/202756
 Patch47: 0001-CVE-2026-4430-Conform-AlignEngine-parsing.patch
+# https://github.com/LibreOffice/core/commit/a28cead4b7796642d946173b479281a6272117f2
+Patch48: 0001-CVE-2026-8357-A-formula-of-length-L-needs-L-plus-1-slots.patch
 
 # not upstreamed
 Patch500: 0001-disable-libe-book-support.patch
@@ -2299,9 +2301,14 @@ gtk-update-icon-cache -q %{_datadir}/icons/hicolor &>/dev/null || :
 %{_includedir}/LibreOfficeKit
 
 %changelog
-* Mon Jul 06 2026 Eduard Abdullin <eabdullin@almalinux.org> - 1:7.1.8.1-15.1.alma.1
+* Wed Jul 15 2026 Eduard Abdullin <eabdullin@almalinux.org> - 1:7.1.8.1-15.2.alma.1
 - Debrand for AlmaLinux
 
+* Mon Jun 29 2026 Tomas Popela <tpopela@redhat.com> - 1:7.1.8.1-15.el9_8.2
+- Fix CVE-2026-8357 Arbitrary code execution via heap buffer overflow in
+  formula compilation
+- Resolves: RHEL-186062
+
 * Tue May 19 2026 Tomas Popela <tpopela@redhat.com> - 1:7.1.8.1-15.el9_8.1
 - Fix CVE-2026-4430 Conform AlignEngine parsing to what section 2.3.4.10 of
   the spec has