[oe][meta-multimedia][wrynose][PATCH 5/22] libde265: patch CVE-2026-49337

[ankur.tyagi85@gmail.com]

From: Ankur Tyagi <ankur.tyagi85@gmail.com>

Details:
https://nvd.nist.gov/vuln/detail/cve-2026-49337

Signed-off-by: Ankur Tyagi <ankur.tyagi85@gmail.com>
---
 .../libde265/libde265/CVE-2026-49337.patch    | 53 +++++++++++++++++++
 .../libde265/libde265_1.0.19.bb               |  1 +
 2 files changed, 54 insertions(+)
 create mode 100644 meta-multimedia/recipes-multimedia/libde265/libde265/CVE-2026-49337.patch

diff --git a/meta-multimedia/recipes-multimedia/libde265/libde265/CVE-2026-49337.patch b/meta-multimedia/recipes-multimedia/libde265/libde265/CVE-2026-49337.patch
new file mode 100644
index 0000000000..88e0e32949
--- /dev/null
+++ b/meta-multimedia/recipes-multimedia/libde265/libde265/CVE-2026-49337.patch
@@ -0,0 +1,53 @@
+From 2f0c53241cb9bf2f5acded53c25f1b74db536de7 Mon Sep 17 00:00:00 2001
+From: Dirk Farin <dirk.farin@gmail.com>
+Date: Mon, 25 May 2026 20:29:40 +0200
+Subject: [PATCH] free orphaned slice header when no active image unit
+ (GHSA-g5hj-rf9f-7vxm)
+
+(cherry picked from commit 683cb9fa603e35840642f98765ab95cdb71cadf9)
+
+CVE: CVE-2026-49337
+Upstream-Status: Backport [https://github.com/strukturag/libde265/commit/683cb9fa603e35840642f98765ab95cdb71cadf9]
+
+Signed-off-by: Ankur Tyagi <ankur.tyagi85@gmail.com>
+---
+ libde265/decctx.cc | 12 ++++++++----
+ 1 file changed, 8 insertions(+), 4 deletions(-)
+
+diff --git a/libde265/decctx.cc b/libde265/decctx.cc
+index fbb3baa1..5deddc37 100644
+--- a/libde265/decctx.cc
++++ b/libde265/decctx.cc
+@@ -478,10 +478,6 @@ de265_error decoder_context::read_slice_NAL(bitreader& reader, NAL_unit* nal, na
+     shdr->entry_point_offset[i] -= skipped;
+   }
+ 
+-  this->img->add_slice_segment_header(shdr);
+-
+-
+-
+   // --- start a new image if this is the first slice ---
+ 
+   if (shdr->first_slice_segment_in_pic_flag) {
+@@ -495,6 +491,13 @@ de265_error decoder_context::read_slice_NAL(bitreader& reader, NAL_unit* nal, na
+ 
+   if ( ! image_units.empty() ) {
+ 
++    // Hand the slice header to the picture (which takes ownership and frees it
++    // on release). Only do this when there is an active image unit to decode
++    // the slice; otherwise the header would be retained on img->slices forever,
++    // which a crafted stream of non-first slice NALs can exploit to grow memory
++    // without bound.
++    this->img->add_slice_segment_header(shdr);
++
+     slice_unit* sliceunit = new slice_unit(this);
+     sliceunit->nal = nal;
+     sliceunit->shdr = shdr;
+@@ -507,6 +510,7 @@ de265_error decoder_context::read_slice_NAL(bitreader& reader, NAL_unit* nal, na
+   }
+   else {
+     nal_parser.free_NAL_unit(nal);
++    delete shdr;
+   }
+ 
+   bool did_work;
diff --git a/meta-multimedia/recipes-multimedia/libde265/libde265_1.0.19.bb b/meta-multimedia/recipes-multimedia/libde265/libde265_1.0.19.bb
index b4f80d18a7..bca5c9d776 100644
--- a/meta-multimedia/recipes-multimedia/libde265/libde265_1.0.19.bb
+++ b/meta-multimedia/recipes-multimedia/libde265/libde265_1.0.19.bb
@@ -10,6 +10,7 @@ LIC_FILES_CHKSUM = "file://COPYING;md5=695b556799abb2435c97a113cdca512f"
 
 SRC_URI = "git://github.com/strukturag/libde265.git;branch=master;protocol=https;tag=v${PV} \
            file://CVE-2026-49295.patch \
+           file://CVE-2026-49337.patch \
 "
 SRCREV = "824b4138ecd51611d7073f1b50d5d6f982609b06"