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[scarthgap] freetype: Fix CVE-2026-23865

Message ID 20260309133055.2209039-1-vanusuri@mvista.com
State Under Review
Delegated to: Yoann Congal
Headers show
Series [scarthgap] freetype: Fix CVE-2026-23865 | expand

Commit Message

Vijay Anusuri March 9, 2026, 1:30 p.m. UTC 
Reference: https://nvd.nist.gov/vuln/detail/CVE-2026-23865
           https://security-tracker.debian.org/tracker/CVE-2026-23865

Picked patch mentioned in NVD

Signed-off-by: Vijay Anusuri <vanusuri@mvista.com>
---
 .../freetype/freetype/CVE-2026-23865.patch    | 54 +++++++++++++++++++
 .../freetype/freetype_2.13.2.bb               |  1 +
 2 files changed, 55 insertions(+)
 create mode 100644 meta/recipes-graphics/freetype/freetype/CVE-2026-23865.patch
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Patch

diff --git a/meta/recipes-graphics/freetype/freetype/CVE-2026-23865.patch b/meta/recipes-graphics/freetype/freetype/CVE-2026-23865.patch
new file mode 100644
index 0000000000..aa0d4326f8
--- /dev/null
+++ b/meta/recipes-graphics/freetype/freetype/CVE-2026-23865.patch
@@ -0,0 +1,54 @@ 
+From fc85a255849229c024c8e65f536fe1875d84841c Mon Sep 17 00:00:00 2001
+From: Werner Lemberg <wl@gnu.org>
+Date: Sat, 3 Jan 2026 08:07:57 +0100
+Subject: [PATCH] [ttgxvar] Check for overflow in array size computation.
+
+Problem reported and analyzed by povcfe <povcfe2sec@gmail.com>.
+
+Fixes issue #1382.
+
+* src/truetype/ttgxvar.c (tt_var_load_item_variation_store): Do it.
+
+Upstream-Status: Backport [https://gitlab.com/freetype/freetype/-/commit/fc85a255849229c024c8e65f536fe1875d84841c]
+CVE: CVE-2026-23865
+Signed-off-by: Vijay Anusuri <vanusuri@mvista.com>
+---
+ src/truetype/ttgxvar.c | 15 ++++++++++++++-
+ 1 file changed, 14 insertions(+), 1 deletion(-)
+
+diff --git a/src/truetype/ttgxvar.c b/src/truetype/ttgxvar.c
+index 2ff40c9e8..96ddc04c8 100644
+--- a/src/truetype/ttgxvar.c
++++ b/src/truetype/ttgxvar.c
+@@ -628,6 +628,7 @@
+       FT_UShort  word_delta_count;
+       FT_UInt    region_idx_count;
+       FT_UInt    per_region_size;
++      FT_UInt    delta_set_size;
+ 
+ 
+       if ( FT_STREAM_SEEK( offset + dataOffsetArray[i] ) )
+@@ -697,7 +698,19 @@
+       if ( long_words )
+         per_region_size *= 2;
+ 
+-      if ( FT_NEW_ARRAY( varData->deltaSet, per_region_size * item_count ) )
++      /* Check for overflow (we actually test whether the     */
++      /* multiplication of two unsigned values wraps around). */
++      delta_set_size = per_region_size * item_count;
++      if ( per_region_size                                &&
++           delta_set_size / per_region_size != item_count )
++      {
++        FT_TRACE2(( "tt_var_load_item_variation_store:"
++                    " bad delta set array size\n" ));
++        error = FT_THROW( Array_Too_Large );
++        goto Exit;
++      }
++
++      if ( FT_NEW_ARRAY( varData->deltaSet, delta_set_size ) )
+         goto Exit;
+       if ( FT_Stream_Read( stream,
+                            varData->deltaSet,
+-- 
+GitLab
+
diff --git a/meta/recipes-graphics/freetype/freetype_2.13.2.bb b/meta/recipes-graphics/freetype/freetype_2.13.2.bb
index ce7a615a3c..e053fef3b5 100644
--- a/meta/recipes-graphics/freetype/freetype_2.13.2.bb
+++ b/meta/recipes-graphics/freetype/freetype_2.13.2.bb
@@ -15,6 +15,7 @@  LIC_FILES_CHKSUM = "file://LICENSE.TXT;md5=843b6efc16f6b1652ec97f89d5a516c0 \
 
 SRC_URI = "${SAVANNAH_NONGNU_MIRROR}/${BPN}/${BP}.tar.xz \
            file://CVE-2025-27363.patch \
+           file://CVE-2026-23865.patch \
 "
 SRC_URI[sha256sum] = "12991c4e55c506dd7f9b765933e62fd2be2e06d421505d7950a132e4f1bb484d"