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Add patch for CVE-2026-2921

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Resolves: RHEL-156137
This commit is contained in:
Wim Taymans 2026-03-31 11:19:09 +02:00
parent 9e3e607a7f
commit f1f1f72934
2 changed files with 52 additions and 1 deletions
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44
0001-riff-Correctly-check-that-enough-RGB-palette-data-is.patch Normal file
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@ -0,0 +1,44 @@
From e59ed136f679ee941e174080d282aca3f5959700 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sebastian=20Dr=C3=B6ge?= <sebastian@centricular.com>
Date: Wed, 11 Feb 2026 19:44:34 +0200
Subject: [PATCH] riff: Correctly check that enough RGB palette data is
available
This can otherwise overflow and result in out-of-bounds reads/writes.
Fixes GST-SA-2026-0004, ZDI-CAN-28854, CVE-2026-2921.
Fixes https://gitlab.freedesktop.org/gstreamer/gstreamer/-/issues/4901
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/10882>
---
subprojects/gst-plugins-base/gst-libs/gst/riff/riff-media.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/subprojects/gst-plugins-base/gst-libs/gst/riff/riff-media.c b/subprojects/gst-plugins-base/gst-libs/gst/riff/riff-media.c
index 870a33ae12..5003fea58b 100644
--- a/subprojects/gst-plugins-base/gst-libs/gst/riff/riff-media.c
+++ b/subprojects/gst-plugins-base/gst-libs/gst/riff/riff-media.c
@@ -1021,7 +1021,7 @@ gst_riff_create_video_caps (guint32 codec_fcc,
if (palette) {
GstBuffer *copy;
guint num_colors;
- gsize size;
+ gsize expected_size, size;
if (strf != NULL)
num_colors = strf->num_colors;
@@ -1030,7 +1030,9 @@ gst_riff_create_video_caps (guint32 codec_fcc,
size = gst_buffer_get_size (palette);
- if (size >= (num_colors * 4)) {
+ if (!g_size_checked_mul (&expected_size, num_colors, 4)) {
+ GST_WARNING ("Palette too large: broken file");
+ } else if (size >= expected_size) {
guint8 *pdata;
/* palette is always at least 256*4 bytes */
--
2.53.0

9
gstreamer1-plugins-base.spec
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@ -9,7 +9,7 @@
Name: gstreamer1-plugins-base
Version: 1.26.7
Release: 1%{?dist}
Release: 2%{?dist}
Summary: GStreamer streaming media framework base plugins
License: LGPL-2.1-or-later
@ -23,6 +23,8 @@ Source0: http://gstreamer.freedesktop.org/src/gst-plugins-base/gst-plugin
%endif
Patch0: 0001-missing-plugins-Remove-the-mpegaudioversion-field.patch
Patch1: 0001-riff-Correctly-check-that-enough-RGB-palette-data-is.patch
BuildRequires: meson >= 0.48.0
BuildRequires: gcc
BuildRequires: gcc-c++
@ -124,6 +126,7 @@ for the GStreamer Base Plugins library.
%prep
%setup -q -n gst-plugins-base-%{version}
%patch -P 0 -p1
%patch -P 1 -p3
%build
%meson \
@ -505,6 +508,10 @@ chrpath --delete $RPM_BUILD_ROOT%{_bindir}/gst-play-1.0
%endif
%changelog
* Tue Mar 31 2025 Wim Taymans <wtaymans@redhat.com> - 1.26.7-2
- Add patch for CVE-2026-2921
Resolves: RHEL-156137
* Mon Nov 03 2025 Wim Taymans <wtaymans@redhat.com> - 1.26.7-1
- Update to 1.26.7
Resolves: DESKTOP-2922