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in repository ffmpeg.
The following commit(s) were added to refs/heads/master by this push:
new 6631bbc5d4 avcodec/jpeg2000dec: Clear header derived variables
6631bbc5d4 is described below
commit 6631bbc5d47082a6212e3c82fce0215fce2dbac6
Author: Michael Niedermayer <[email protected]>
AuthorDate: Wed May 6 02:33:01 2026 +0200
Commit: michaelni <[email protected]>
CommitDate: Thu May 28 22:31:36 2026 +0000
avcodec/jpeg2000dec: Clear header derived variables
Fixes: NULL pointer dereference
Found-by: Oguzhan Akkaya with AFL++ fuzzing (May 2026)
Signed-off-by: Michael Niedermayer <[email protected]>
---
libavcodec/jpeg2000dec.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/libavcodec/jpeg2000dec.c b/libavcodec/jpeg2000dec.c
index 01c025235e..ed8ff83fd0 100644
--- a/libavcodec/jpeg2000dec.c
+++ b/libavcodec/jpeg2000dec.c
@@ -2451,8 +2451,14 @@ static void jpeg2000_dec_cleanup(Jpeg2000DecoderContext
*s)
memset(s->qntsty, 0, sizeof(s->qntsty));
memset(s->properties, 0, sizeof(s->properties));
memset(&s->poc , 0, sizeof(s->poc));
+ memset(s->roi_shift, 0, sizeof(s->roi_shift));
s->numXtiles = s->numYtiles = 0;
s->ncomponents = 0;
+ s->has_ppm = 0;
+ s->isHT = 0;
+ s->precision = 0;
+ s->colour_space = 0;
+ s->pal8 = 0;
}
static int jpeg2000_read_main_headers(Jpeg2000DecoderContext *s)
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