Commit 3550b1f04e for ffmpeg

commit 3550b1f04e92bb35264dabb511b23acb6a543f85
Author: Michael Niedermayer <michael@niedermayer.cc>
Date:   Sun Nov 8 16:47:11 2026 +0100

    avcodec/vmdvideo: reject frames with an unknown rendering method

    Fixes: information disclosure
    Fixes: gwIoY2z5dNBe
    Information disclosure Replicated through UnModified FFmpeg

    Found during triage of the security report 4q1titS5dliF

diff --git a/libavcodec/vmdvideo.c b/libavcodec/vmdvideo.c
index 022e60a692..a9f73389af 100644
--- a/libavcodec/vmdvideo.c
+++ b/libavcodec/vmdvideo.c
@@ -372,6 +372,9 @@ static int vmd_decode(VmdVideoContext *s, AVFrame *frame)
             pp  = FF_PTR_ADD(pp, prev_linesize);
         }
         break;
+    default:
+        avpriv_request_sample(s->avctx, "Method %d", meth);
+        return AVERROR_PATCHWELCOME;
     }
     return 0;
 }