From 1687daa93c131f929495c7ab0509d2e5c98b40f5 Mon Sep 17 00:00:00 2001 From: Michael Niedermayer Date: Sun, 3 Aug 2025 01:47:54 +0200 Subject: [PATCH] avcodec/fits: Clear naxis Fixes: Use of uninitialized memory Fixes: 423673969/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_FITS_DEC_fuzzer-5602250833854464 Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg Signed-off-by: Michael Niedermayer --- libavcodec/fits.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/libavcodec/fits.c b/libavcodec/fits.c index 5f364960e0..0fc2d895b7 100644 --- a/libavcodec/fits.c +++ b/libavcodec/fits.c @@ -32,6 +32,8 @@ int avpriv_fits_header_init(FITSHeader *header, FITSHeaderState state) { header->state = state; header->naxis_index = 0; + header->naxis = 0; + memset(header->naxisn, 0, sizeof(header->naxisn)); header->blank_found = 0; header->pcount = 0; header->gcount = 1;