From d6db7799503ee1b3b14ce7cb9d9ee776d86a583e Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Wed, 24 Jun 2026 03:00:42 +0200 Subject: [PATCH] avcodec/hevc: Fix integer overflow in WPP entry point range check Fixes: out of array access Fixes: poc.hevc / make_poc.py Fixes: 83WY4xnR87vb Fixes: dad354f38d (avcodec/hevc: Check max ctb addresses for WPP) Found-by: VulnForge Security Research Team Signed-off-by: Michael Niedermayer (cherry picked from commit ba55f425fdd889a7998fce068367e9d3a6c40af4) Signed-off-by: Michael Niedermayer --- libavcodec/hevc/hevcdec.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/libavcodec/hevc/hevcdec.c b/libavcodec/hevc/hevcdec.c index ae064ec8af..18e22f697e 100644 --- a/libavcodec/hevc/hevcdec.c +++ b/libavcodec/hevc/hevcdec.c @@ -2920,7 +2920,7 @@ static int hls_slice_data_wpp(HEVCContext *s, const H2645NAL *nal) int64_t startheader, cmpt = 0; int j, res = 0; - if (s->sh.slice_ctb_addr_rs + s->sh.num_entry_point_offsets * sps->ctb_width >= sps->ctb_width * sps->ctb_height) { + if (s->sh.slice_ctb_addr_rs + s->sh.num_entry_point_offsets * (int64_t)sps->ctb_width >= sps->ctb_width * (int64_t)sps->ctb_height) { av_log(s->avctx, AV_LOG_ERROR, "WPP ctb addresses are wrong (%d %d %d %d)\n", s->sh.slice_ctb_addr_rs, s->sh.num_entry_point_offsets, sps->ctb_width, sps->ctb_height