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BUG: Check dim[0] before using it to index dim[] in the NIFTI-2 converter #64

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Merged
hjmjohnson merged 1 commit into from
Sep 22, 2026
Merged

BUG: Check dim[0] before using it to index dim[] in the NIFTI-2 converter #64

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8 changes: 8 additions & 0 deletions nifti2/nifti2_io.c
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Original file line number Diff line number Diff line change
Expand Up @@ -5036,6 +5036,14 @@ nifti_image* nifti_convert_n2hdr2nim(nifti_2_header nhdr, const char * fname)
ERREX("bad datatype") ;
}

/* dim[0] is the number of dimensions and the loops below index dim[]
with it; the NIFTI-1 path gets this check from need_nhdr_swap() */
if( nhdr.dim[0] < 0 || nhdr.dim[0] > 7 )
{
free(nim);
ERREX("bad dim[0]") ;
}

if( nhdr.dim[1] <= 0 )
{
free(nim);
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