ffmpeg: fix CVE-2025-0518

Unchecked Return Value, Out-of-bounds Read vulnerability in FFmpeg allows
Read Sensitive Constants Within an Executable. This vulnerability is associated
with program files https://github.Com/FFmpeg/FFmpeg/blob/master/libavfilter/af_pan.C
This issue affects FFmpeg: 7.1.
Issue was fixed:  b5b6391d64
b5b6391d64
This issue was discovered by: Simcha Kosma

(From OE-Core rev: 75ad6e004de95ff6208820ccf2c0af01d9363749)

Signed-off-by: Archana Polampalli <archana.polampalli@windriver.com>
Signed-off-by: Steve Sakoman <steve@sakoman.com>

meta/recipes-multimedia/ffmpeg/ffmpeg/CVE-2025-0518.patch

@@ -0,0 +1,34 @@
+From b5b6391d64807578ab872dc58fb8aa621dcfc38a Mon Sep 17 00:00:00 2001
+From: Michael Niedermayer <michael@niedermayer.cc>
+Date: Mon, 6 Jan 2025 22:01:39 +0100
+Subject: [PATCH] avfilter/af_pan: Fix sscanf() use
+
+Fixes: Memory Data Leak
+
+Found-by: Simcha Kosman <simcha.kosman@cyberark.com>
+Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
+
+CVE: CVE-2025-0518
+
+Upstream-Status: Backport [https://github.com/FFmpeg/FFmpeg/commit/b5b6391d64807578ab872dc58fb8aa621dcfc38a]
+
+Signed-off-by: Archana Polampalli <archana.polampalli@windriver.com>
+---
+ libavfilter/af_pan.c | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/libavfilter/af_pan.c b/libavfilter/af_pan.c
+index cfed9f1..ffcd214 100644
+--- a/libavfilter/af_pan.c
++++ b/libavfilter/af_pan.c
+@@ -165,7 +165,7 @@ static av_cold int init(AVFilterContext *ctx)
+         sign = 1;
+         while (1) {
+             gain = 1;
+-            if (sscanf(arg, "%lf%n *%n", &gain, &len, &len))
++            if (sscanf(arg, "%lf%n *%n", &gain, &len, &len) >= 1)
+                 arg += len;
+             if (parse_channel_name(&arg, &in_ch_id, &named)){
+                 av_log(ctx, AV_LOG_ERROR,
+--
+2.40.0

meta/recipes-multimedia/ffmpeg/ffmpeg_6.1.1.bb

@@ -50,6 +50,7 @@ SRC_URI = " \
     file://CVE-2025-25473.patch \
     file://CVE-2025-25471.patch \
     file://CVE-2025-22921.patch \
+    file://CVE-2025-0518.patch \
 "
 
 SRC_URI[sha256sum] = "8684f4b00f94b85461884c3719382f1261f0d9eb3d59640a1f4ac0873616f968"