jbig2_parse_segment(Jbig2Ctx *ctx, Jbig2Segment *segment, const uint8_t *segment_data)
{
    jbig2_error(ctx, JBIG2_SEVERITY_INFO, segment->number,
                "Segment %d, flags=%x, type=%d, data_length=%d", segment->number, segment->flags, segment->flags & 63, segment->data_length);
    switch (segment->flags & 63) {
    case 0:
        return jbig2_symbol_dictionary(ctx, segment, segment_data);
    case 4:                    /* intermediate text region */
    case 6:                    /* immediate text region */
    case 7:                    /* immediate lossless text region */
        return jbig2_text_region(ctx, segment, segment_data);
    case 16:
        return jbig2_pattern_dictionary(ctx, segment, segment_data);
    case 20:                   /* intermediate halftone region */
    case 22:                   /* immediate halftone region */
    case 23:                   /* immediate lossless halftone region */
        return jbig2_halftone_region(ctx, segment, segment_data);
    case 36:
        return jbig2_error(ctx, JBIG2_SEVERITY_WARNING, segment->number, "unhandled segment type 'intermediate generic region'");
    case 38:                   /* immediate generic region */
    case 39:                   /* immediate lossless generic region */
        return jbig2_immediate_generic_region(ctx, segment, segment_data);
    case 40:                   /* intermediate generic refinement region */
    case 42:                   /* immediate generic refinement region */
    case 43:                   /* immediate lossless generic refinement region */
        return jbig2_refinement_region(ctx, segment, segment_data);
    case 48:
        return jbig2_page_info(ctx, segment, segment_data);
    case 49:
        return jbig2_end_of_page(ctx, segment, segment_data);
    case 50:
        return jbig2_end_of_stripe(ctx, segment, segment_data);
    case 51:
        ctx->state = JBIG2_FILE_EOF;
        return jbig2_error(ctx, JBIG2_SEVERITY_INFO, segment->number, "end of file");
    case 52:
        return jbig2_error(ctx, JBIG2_SEVERITY_WARNING, segment->number, "unhandled segment type 'profile'");
    case 53:                   /* user-supplied huffman table */
        return jbig2_table(ctx, segment, segment_data);
    case 62:
        return jbig2_parse_extension_segment(ctx, segment, segment_data);
    default:
        jbig2_error(ctx, JBIG2_SEVERITY_WARNING, segment->number, "unknown segment type %d", segment->flags & 63);
    }
    return 0;
}

The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.